Crown Mixer IQAMB 5 User Manual

*AMB-5/*SMX-6

DATA

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IQ Mixer/Multiplexers with Automatic Signal Processing

219-294-8000. The IQ–AMB-5 and IQ–SMX-6 are produced by Crown International, Inc. Trademark Notice:

IQ2 ^™is a trademark and Crown^®, IQ System^®, Com-Tech^®,and PZM^®are registered trademarks of Crown

International, Inc. Other trademarks are the property of their respective owners.

Printed on

recycled paper.

126869-1

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

Important Safety Instructions

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water.

6) Clean only with a dry cloth.

7) Do not block any ventilation openings. Install in accordance

with the manufacturer’s instructions.

8) Do not install near any heat sources such as radiators, heat

registers, stoves, or other apparatus that produce heat.

9) Do not defeat the safety purpose of the polarized or ground-

ing-type plug. A polarized plug has two blades with one wider

than the other. A grounding-type plug has two blades and a

third grounding prong. The wide blade or the third prong is

provided for your safety. If the provided plug does not fit into

your outlet, consult an electrician for replacement of the obso-

lete outlet.

10) Protect the power cord from being walked on or pinched, par-

ticularly at plugs, convenience receptacles, and the point

where they exit from the apparatus.

11) Only use attachments/accessories specified by the manufac-

turer.

12) Use only with a cart, stand, bracket, or table specified by the

manufacturer, or sold with the apparatus. When a cart is used,

use caution when moving the cart/apparatus combination to

avoid injury from tip-over.

13) Unplug this apparatus during lightning storms or when unused

for long periods of time.

14) Refer all servicing to qualified service personnel. Servicing is

required when the apparatus has been damaged in any way,

such as power-supply cord or plug is damaged, liquid has

been spilled or objects have fallen into the apparatus, the ap-

paratus has been exposed to rain or moisture, does not oper-

ate normally, or has been dropped.

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

The information furnished in this manual does not include all of the details of design, production,

or variations of the equipment. Nor does it cover every possible situation which may arise during

installation, operation or maintenance. If you need special assistance beyond the scope of this

manual, please contact our Technical Support Group.

Crown Audio Technical Support Group

Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A.

Phone: 800-342-6939 (North America, Puerto Rico and Virgin Islands) or 219-294-8200

Fax: 219-294-8301 Fax Back (North America only): 800-294-4094 or 219-293-9200

Fax Back (International): 219-294-8100 Internet: http://www.crownintl.com email: [email protected]

WARNING

TO REDUCETHE RISK OF ELECTRIC

SHOCK, DO NOT EXPOSETHIS

EQUIPMENTTO RAIN OR MOISTURE!

PLEASE NOTE

The following universal symbols may appear on your product and/or in various

sections of this manual. Wherever they appear, they are to be interpreted as follows:

Lightning Bolt Symbol:

This symbol is used to alert the user to the presence of dangerous

voltages and the possible risk of electric shock.

Exclamation Mark Symbol:

This symbol is used to alert the user to refer to the instruction

manual for important operating or maintenance instructions.

FCC Class A Compliance

This equipment has been tested and found to comply with the limits for Class A

Digital Device, pursuant to Part 15 of the FCC rules. These limits are designed to

provide reasonable protection against harmful interference when the equipment is

operated in a commercial environment. This equipment generates, uses and can

radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications. Op-

eration of this equipment in a residential area is likely to cause harmful interference

in which case the user will be required to correct the interference at his own expense.

The user is cautioned that any changes or modifications not expressly approved by

the party responsible for compliance could void the user’s authority to operate the

equipment.

Note: For a system to comply with FCC rules, all components in the system must be

in compliance. Please consult the instruction manuals of all components in an IQ

System for FCC compliance.

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

Quick Install Procedure

This procedure is provided for those who are already familiar with Crown’s

IQ System^®and who would like to install the mixer/multiplexer in the

shortest time possible. Less experienced installers or those wishing a full

explanation of the installation procedure are encouraged to go to Section

3 where the full installation procedure is described.

Prepare the mixer/multiplexer:

1 Set the IQ address switch (Figure 3.3) on the mixer/multiplexer to

an unused IQ address.

3 If the mixer/multiplexer is to be used as a system interface, set the

baud rate and parity switches.

Mounting:

4 Mount the unit into a standard 19-inch (48.3-cm) equipment rack or

cabinet, or it can be stacked.

Install the wiring:

5 Connect the mixer/multiplexer to the IQ System via the Crown Bus,

or directly to the host computer if the mixer/multiplexer is to be used

as the system interface (see Section 3.1 if more information is

needed).

6 Turn off all amplifiers or other equipment that will either feed or be

connected to the unit.

7 Connect the audio wiring to the mixer/multiplexer inputs and out-

puts.

8 Connect any circuits to be used with the AUX connector to the unit.

9 Connect the unit to the AC receptacle.

Prepare the audio system:

10 Set all equalizers, filters, delays and any other processing equip-

ment the will be in the signal chain before or after the mixer/multi-

plexer.

11 Set and verify all level and gain settings on all amplifiers or other

equipment that will either feed or be connected to the unit.

Configure the mixer/multiplexer:

12 Set input selector switches for Mic, Line, or Phantom, depending

upon input signal to be fed to the input.

13 Set gain levels on the back of the unit.

14 Use IQ software to set up the mixer/multiplexer software-controlled

features.

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

CONTENTS

Quick Install Procedure ................................................................. 5

1 Welcome ......................................................................................... 8

1.1 Unpacking .............................................................................. 8

2 Controls, Connectors & Indicators ................................................ 9

3 Hardware Installation ................................................................... 10

3.1 Connecting to a Host Computer ............................................ 10

3.2 Connecting to the Crown Bus ................................................ 11

3.2.1 Set the IQ Address Switch .......................................... 11

3.2.2 Connect to the IQ System via the Crown Bus .............. 12

3.3 Connect the Audio Wiring...................................................... 14

3.6 Connect Auxiliary Devices .................................................... 14

4 Operation...................................................................................... 15

4.1 Hardware .............................................................................. 15

4.1.1 IQ Address Switch .......................................................... 15

4.1.2 Baud Rate and Parity Switch ........................................... 15

4.1.3 Enable Indicator.............................................................. 15

4.1.4 DATA Indicator ................................................................ 15

4.1.5 Main Audio Inputs ........................................................... 15

4.1.6 Sense Input..................................................................... 15

4.1.7 Main Audio Outputs ........................................................ 15

4.1.8 Bus Outputs .................................................................... 15

4.1.9 Stack Audio Inputs .......................................................... 15

4.1.10 Crown Bus Connector ..................................................... 16

4.1.11 Crown Bus Ground Connector ........................................ 16

4.1.12 RS232 Serial Port ........................................................... 16

4.1.13 Sensing AUX Port ........................................................... 16

4.2 Computerized Control and Monitoring

4.2.1 Manual/Auto Mode .......................................................... 16

4.2.2 Input Level Monitors ........................................................ 16

4.2.3 Output Level Monitors ..................................................... 16

4.2.4 Bus Output Relays .......................................................... 16

4.2.5 VCA Gain Controls .......................................................... 16

Automatic Mixing Features

4.2.6 Gate................................................................................ 16

4.2.7 Duck Priority ................................................................... 17

4.2.8 Input Compressor ........................................................... 17

4.2.9 Auto Level ....................................................................... 17

4.2.10 Output Compressor ........................................................ 18

4.2.11 Gate Count ..................................................................... 18

4.2.12 Ambience ....................................................................... 18

4.3 Crown Local Net ................................................................... 19

5 Technical Information .................................................................. 19

5.1 Audio 19

5.1.1 Input Section .............................................................. 19

5.1.2 VCA Sections.............................................................. 19

5.1.3 Output Section ............................................................ 20

5.1.4 Level Sense Circuits ................................................... 20

5.2 Control and Interface Section ................................................ 20

5.2.1 Crown Bus Interface ....................................................... 20

5.2.2 RS232 Interface .............................................................. 20

5.2.3 D/A Converter ................................................................. 20

5.2.4 Log Amp and A/D Converter ........................................ 20

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

5.3 Auxiliary Port ......................................................................... 20

6 IQ Audio In Depth ......................................................................... 23

6.1 A Closer Look at Audio Signal Wiring ........................................ 23

6.1.1 Input ............................................................................... 23

6.1.2 IQ–AMB-5 Ambient Sensing Input ................................... 24

6.1.3 Ouput ............................................................................. 24

6.1.4 Stack Inputs .................................................................... 25

6.1.5 Paralleling Inputs ............................................................ 26

6.2 Using the AUX Port ............................................................... 27

6.3 The Mixer/Multiplexer as IQ Interface .................................... 28

6.4 Crown Local Net ................................................................... 28

6.4.1 Wiring the Crown Local Net ........................................ 28

6.5 A Closer Look at Crown Bus Wiring ....................................... 29

7 IQ Address Tables ........................................................................ 30

8 Factory Service ............................................................................ 32

Illustrations

Figure 1.1 The IQ–AMB-5 and IQ–SMX-6........................................................ 8

Figure 2.1 IQ Mixer / Multiplexer Controls, Connectors & Indicators ................ 9

Figure 3.1 IQ System with Host Computer and Two Mixer/Multiplexers ......... 10

Figure 3.2 RS232 Cable Wiring ..................................................................... 11

Figure 3.3 Selecting IQ Address and Communication Parameters ................ 12

Figure 3.4 Four-Terminal Removable Barrier Block Plug................................ 13

Figure 3.5 Crown Bus Wiring for Removable Barrier Blocks .......................... 13

Figure 3.6 Crown Bus Wiring for 5-pin DIN Input ........................................... 13

Figure 3.7 Crown Bus Wiring for RJ-45 Input ................................................ 13

Figure 3.8 Crown Bus Wiring for 4-pin DIN Output ........................................ 13

Figure 3.9 Crown Bus Wiring for RJ-45 Output .............................................. 13

Figure 3.10 Crown Bus Wiring “Loop” from Output to Input ............................. 14

Figure 5.1 IQ–AMB-5 Block Diagram ............................................................ 21

Figure 5.2 IQ–SMX-6 Block Diagram ............................................................ 22

Figure 6.1 An Audio Input Section ................................................................ 23

Figure 6.2 Suggested Audio Input Gain Control Settings .............................. 23

Figure 6.3 Balanced Audio Input Wiring........................................................ 23

Figure 6.4 Unbalanced Audio Input Wiring ................................................... 24

Figure 6.5 Sensing Input Section .................................................................. 24

Figure 6.6 Audio Output Section ................................................................... 25

Figure 6.7 Balanced Audio Output Connections ........................................... 25

Figure 6.8 Unbalanced Audio Output Connections ....................................... 25

Figure 6.9 A 12x2 Mixer Using 2 Mixer/Multiplexers ...................................... 25

Figure 6.10 Stacking the Outputs of Multiple Units .......................................... 26

Figure 6.11 A 6x8 Mixer Using 4 Mixer/Multiplexers ........................................ 26

Figure 6.12 Paralleling the Inputs of Multiple Units .......................................... 26

Figure 6.13 A 12x8 Mixer Using 8 Mixer/Multiplexers ...................................... 26

Figure 6.14 Sample Auxiliary System Wiring ................................................... 27

Figure 6.15 Internal Auxiliary Circuit................................................................ 27

Figure 6.16 A Crown Local Net RS232 Serial Loop ......................................... 28

Figure 6.17 Crown Local Net Wiring ............................................................... 28

Figure 7.1 IQ Address Switch Settings from 0 to 125..................................... 30

Figure 7.2 IQ Address Switch Settings from 126 to 250................................. 31

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

DSPI

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DSPI

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Figure 1.1 The IQ–AMB-5 and IQ–SMX-6

1 Welcome

Thank you for purchasing a Crown^®IQ mixer/multi-

plexer. IQ mixer/multiplexers are intelligent mixers with

special signal routing capabilities. Their intelligence

stems from a powerful onboard microprocessor which

enables them to be controlled by a Crown IQ System^®.

Each input and output can be individually controlled

and, with their distributed intelligence^™capability, con-

tinue to operate even when an IQ System is not con-

nected.

The IQ–AMB-5 has the same functions as an IQ–SMX-

6 plus it has the ability to sense ambient sound level

and automatically adjust its output level accordingly. In

this way it serves as the ultimate automatic level con-

troller. Input 6 is dedicated as the sensing input, leav-

ing 5 inputs to function normally as a 5x2 mixer. Unlike

the IQ–SMX-6, signal processing is only available for

Channel 1. Channel 2 functions as a manual mixer.

This manual will help you successfully install your unit.

Please read all the instructions, warnings and cautions

contained within it. Also, for your protection, please

send in the warranty registration card today. And save

the bill of sale—it is your official proof of purchase.

In addition to two main outputs (one for each channel),

each model has a second set of “bus” outputs which

are switched on and off by a relay. This enables many

mixer/multiplexers to be connected to a common au-

dio bus without loading it down. They are designed to

work as stand-alone units in a small audio system, or

as modules in a large audio system.

Two models are available to serve different needs. The

IQ–SMX-6^™model operates as a 6x2 mixer. The IQ–

AMB-5^™can operate as a 5x1 mixer. Multiple units can

be connected together to form larger mixers. For ex-

ample, two IQ–SMX-6 mixers can be connected to-

gether to form a single 12x2 mixer.

1.1 Unpacking

Please inspect the unit for any damage that may have

occurred during transit. If damage is found, notify the

transportation company immediately. Only you, the

consignee, may initiate a claim with the carrier for

shipping damage. Crown will cooperate fully as

needed. Save the shipping carton as evidence of

damage for the shipper’s inspection.

The IQ–SMX-6 provides basic mixing capabilities, as

well as automatic signal processing. A sensing circuit

is located at the beginning of each input to sense the

input signal level ahead of any signal processing. Simi-

lar sensors, along with its onboard intelligence, enable

the IQ–SMX-6 to perform many versatile functions like

automatic mixing, compression, and automatic level

control.

Please save all packing materials. NEVER SHIP THE

UNIT WITHOUT THE FACTORY PACK.

Page 8

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

2 Controls, Connectors & Indicators

Figure 2.1 IQ Mixer / Multiplexer Controls, Connectors & Indicators

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

RS232

DSPI

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DSPI

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ODEP

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CH1

CH2

CH1

CH2

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ODEP

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ODEP

IOC

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CH1

CH2

CH1

CH2

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ODEP

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ODEP

IOC

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CH1

CH2

CH1

CH2

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Figure 3.1 An IQ System with a Host Computer and Two Mixer/Multiplexers

3 Hardware Installation

How the mixer/multiplexer will be used will determine

whether or not it will need to be connected directly to a

host computer. If the unit will be connected to the

Crown Bus it will not need to be connected directly to a

host computer. The following circumstances require

connection to a host computer:

The installation of an IQ mixer/multiplexer consists of

two major parts: installing the hardware and configur-

ing the software. This manual deals only with hardware

installation. Refer to the appropriate software docu-

mentation for instructions in setting up and operating

your IQ software.

• If a Crown Bus will not be used, the mixer/multi-

plexer will need to be connected to a host com-

puter so the software inside the unit can be

configured. Afterward, if manual control is not

required, the host computer can be discon-

nected.

Provide adequate cooling if the unit will be used in a

hot environment. It is good practice to allow one

empty rack space (1.75 inches or 4.4 cm.) between

each unit if more than four units will be stacked in a

cabinet. Each empty rack space should be sealed

with a blank rack panel.

• If the mixer/multiplexer must be configured be-

fore it is installed into an IQ System, it must be

connected directly to a host computer for con-

figuration. The onboard memory of the unit will

maintain its software configuration without it

being plugged into an AC source.

The hardware installation is divided into 4 steps: 1)

connecting to a host computer 2) connecting to the

Crown Bus 3) connecting the audio inputs and outputs

and 4) connecting auxiliary devices

3.1 Connecting to a Host Computer (Step 1)

An IQ host computer is an IBM^®PC-compatible com-

puter which is used is used to configure or control/

monitor part or all of an IQ System. Depending upon

the design of your IQ System, it may or may not require

a host computer during normal operation.

• If the mixer/multiplexer will be used as an IQ

interface for other IQ–AMB-5 or IQ–SMX-6 mix-

ers, it will need to be connected directly to a

host computer.

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

One of the advantages of connecting directly to a host

computer is that a separate IQ interface (IQ–INT-II) is

not required. If you plan to configure the unit while it is

connected to the Crown Bus, skip ahead to Section

3.2.

• Use the highest baud rate possible. IQ mixer/

multiplexers can be set as high as 19.2 K baud.

• If the host computer fails to communicate with the

unit and the communication standard and pa-

rameters are set correctly, try reducing the baud

rate of both the unit and the computer.

RS232 is commonly used with IBM PCs and com-

patibles, and is the communication standard sup-

ported by the mixer/multiplexer when used as an

interface. Because it uses unbalanced signal wiring, it

cannot be used for distances over 50 feet (15.2 m).

• If communication problems persist, check the se-

rial cable for improper wiring or possible shorted

or broken wires.

• For further assistance contact the Crown Techni-

cal Support Group (see Section 8 for contact in-

formation.)

The following illustration shows how to wire the serial

cable:

3.2 Connecting to the Crown Bus (Step 2)

The Crown Bus is a serial communication loop de-

signed to transmit IQ commands and data. As a com-

munication standard, it is independent of the wiring

system used. This flexibility is a great strength, en-

abling a Crown Bus loop to be wired with either fiber

optic cabling or with inexpensive twisted-pair wire,

whichever the installation requires. A single IQ System

can have more than one Crown Bus loop. To function

properly, a Crown Bus loop must be unbroken.

3.2.1 Set the IQ Address Switch

Figure 3.2 RS232 Cable Wiring

By giving each IQ component a unique address, it can

be individually controlled and monitored. Whenever

the IQ System wants to send a command to just one IQ

component, it first sends its address and then the

command down the Crown Bus.

Important: Do not use twisted pair wire for RS232

because it increases crosstalk. Instead, use an un-

twisted cable or ribbon cable.

Setting the communication parameters for RS232 se-

rial communication is accomplished using the six-seg-

ment baud rate and parity DIP switch shown in Figure

3.3. The first four switches select the baud rate and the

last two set the parity. Use the fastest baud rate pos-

sible. The highest baud rate supported by the unit is

19.2 K baud. Parity checking is not supported and

should be OFF. The odd/even parity bit setting doesn't

matter when parity is switched OFF. The unit has been

factory set to 1 stop bit and 8 data bits.

The IQ Address switch has eight segments because it

actually contains eight tiny switches inside. The switch

is shown in Figure 3.3.

Each of the eight segments in the IQ Address switch

have a value which doubles as the number increases.

For example segment 1 has a value of 1; segment 2

has a value of 2; segment 3 has a value of 4; segment

4 has a value of 8 and so on.

The address is determined by adding the values of all

“ON” segments. In Figure 3.3, segments 2, 5, 6, and 7

are on. Simply add the values to find the address:

2+16+32+64=114.

The communication parameters of the host computer

are set by the IQ software. Please refer to the IQ

software documentation for information about setting

up communication parameters.

A convenient series of IQ address tables are included

in Section 7. The tables show the switch settings for all

250 addresses.

Here are some important guidelines when configuring

serial communication:

No two IQ components of the same type which are

connected to the same Crown Bus can have the same

address. Suppose, for example, an IQ System has two

• Use the same communication parameters at

each end. The unit and the computer must be set

for the same baud rate and parity checking.

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

Crown Bus loops, 1 and 2, and an IQ–SMX-6 is to be

installed into loop 1 and given an address of 114. No

other IQ–SMX-6 can be given the same address in

loop 1. However, an IQ–SMX-6 in loop 2 can have the

same address.

3.2.2 Connect the mixer/multiplexer to the IQ System

via the Crown Bus

The IQ components in a Crown Bus loop are wired

sequentially. The loop begins and ends with the IQ

interface. The output of one IQ component “loops” to

the input of the next and so on as shown in Figure 3.10.

Different IQ components in the same Crown Bus loop

can have the same address. For example, both an IQ–

SMX-6 and an IQ–AMB-5 can use address 114 in the

same loop.

There are three different types of connectors used for

Crown Bus wiring on IQ components. These include

DIN connectors, RJ-45 connectors, and removable

barrier strip plugs. IQ mixer/multiplexers use four ter-

minal removable barrier strip connectors that accept

plugs like the one shown in Figure 3.4.

A valid IQ address is any number from 1 to 250. Do not

use a number higher than 250 since they are reserved

for special use. An address of “0” (zero) should never

be used.

Figure 3.3 Selecting the IQ Address and Communication Parameters

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

/16 in

(0.48 cm)

Figure 3.4 Four-Terminal Removable Barrier Block Plug

The following examples show how to connect the

mixer/multiplexer to other IQ components on the

Crown Bus:

Figure 3.7 Crown Bus Wiring for RJ-45 Input

4-pin DIN Output

4-pin Removable Barrier

Block (Mixer/Multiplexer)

Mixer/Multiplexer 1

Mixer/Multiplexer 2

2 3 4

1 2 3 4

2 3

Cable connectors are numbered as they appear from the front.

Input (–)

Input (+)

Output (–)

Output (+)

GND

Input (–)

Input (+)

Output (–)

Output (+)

GND

Input (–)

Input (+)

Output (–)

Output (+)

GND

Output (+)

(Not Used)

Optional Shield

Figure 3.8 Crown Bus Wiring for 4-pin DIN Output

Figure 3.5 Crown Bus Wiring for Removable Barrier

Blocks

5-pin DIN Input

4-pin Removable Barrier

Block (Mixer/Multiplexer)

2 3

Cable connectors are numbered as they appear from the front.

Input (–)

Input (+)

Output (–)

Output (+)

GND

Input (–)

Input (+)

GND

(Not Used)

Figure 3.6 Crown Bus Wiring for 5-pin DIN Input

Figure 3.9 Crown Bus Wiring for RJ-45 Output

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

3.3 Connect the Audio Wiring (Step 3)

3.4 Connect Auxiliary Devices (Step 4)

IQ mixer/multiplexers have 6 mic/line inputs and 2

stack inputs (Input 6 of the IQ–AMB-5 is dedicated for

ambient sensing). Two audio channels feed two main

and two auxiliary bus outputs. Three-terminal remov-

able barrier block connectors are provided for the mic/

line inputs and main and bus outputs. RCA-type

phono jacks are provided for the stack inputs. See

Section 5.1 for information on the operation of the

mixer/multiplexer inputs and outputs.

Connect any external circuits you plan to use to

control the AUX input and/or monitor the AUX output

of the mixer/multiplexer. See section 5.2 for

information on the operation of the AUX input and

output and for examples of wiring circuits to the AUX

connector.

Important: Provide adequate

cooling if the unit will be used in a

hot environment. It is good prac-

tice to allow one empty rack

space (1.75 inches or 4.4 centi-

meters) between each unit if

more than four units will be

stacked in a cabinet. Each empty

rack space should be sealed with

a blank rack panel to facilitate

proper air flow inside the cabinet.

AUDIO

Figure 3.10 Crown Bus Wiring “Loop”from Output to Input of Each IQ Component

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

4.1.3 Enable Indicator

4 Operation

The front panel Enable indicator lights up to show

that the unit is plugged in and AC power is being

supplied.

The IQ–AMB-5 and IQ–SMX-6 sensing mixer/multi-

plexers are IQ components that can be controlled

and monitored from a remote location via an IQ

System. In addition to basic mixing functions, the

IQ–AMB-5 and IQ–SMX-6 sensing mixer/multiplex-

ers offer advanced signal processing and have the

capability of mixing audio signals automatically. The

IQ–SMX-6 is a 6x2 automatic mixer, with computer

controlled input switching and routing capabilities.

The IQ–AMB-5 features many of the same automatic

functions as the IQ–SMX-6, with the added ability to

sense and compensate for ambient noise levels.

The IQ–AMB-5 operates as a 5x1 automatic mixer

with the sixth input reserved for ambient level sens-

ing. In addition, it operates as a passive 6x1 mixer

that is output independently to channel 2, ideal for

monitoring purposes. Both models can be inte-

grated with other like units to form larger composite

mixers.

4.1.4 DATA Indicator

The front panel DATA indicator lights up to show that

digital information is being received by the internal

processor from an external source (Crown Bus or

serial computer port). A DATA indicator also ap-

pears in IQ software, and can be forced to remain lit

as a helpful diagnostic tool.

4.1.5 Main Audio Inputs

Three-terminal removable barrier block connectors

are provided for the audio inputs. Each input has a

three-position M/L/P selector switch for mic level,

line level, or mic level with +44 VDC phantom power.

Select the left position (M) for microphone signal

levels up to +7 dBu (o dBu = 0.775 volts). Select the

center position (L) for line level signals up to +32

dBu. Select the right position (P) to provide 44 VDC

to mics requiring phantom power.

The following sections describe the IQ–AMB-5 and

IQ–SMX-6 features and their operation. Where

specified, some features are accessed via controls

located on the unit itself; however, most of the fea-

tures are configured and controlled using IQ soft-

ware. Please contact your Crown representative or

Crown's Technical Support Group if you are unfamil-

iar with IQ software.

4.1.6 Sense Input (IQ–AMB-5 only)

The IQ–AMB-5 has a Sense input in place of one of

the Main inputs. This input is identical in all respects

to a Main input, except for the internal routing of the

audio after the gain stages. The Sense input does

not enter the output channel 1 mix, although it can

enter the output channel 2 mix (as a sixth main

input). The sense input is used to “sense” ambient

noise levels through a connected microphone. The

IQ–AMB-5 uses this signal to automatically adjust

other input levels to compensate for changes in

ambient noise level.

4.1 Hardware

4.1.1 IQ Address Switch

A 8-segment DIP switch is used to set the IQ ad-

dress of the unit. The unit must be given a unique IQ

address so it can be independently controlled and

monitored by the system. It must also be set prop-

erly if an IQ–SMX-6 is to be used in a Crown Local

Net. Two or more IQ components should NEVER

have the same address on the same Crown Bus

loop. See section 3.2.1 for more information about

setting the IQ address. Important: The IQ address

should only be set with the power cord discon-

nected from the AC supply.

4.1.7 Main Audio Outputs

a 3-pin removable barrier block plug is used to

connect to the main output of each channel. These

outputs can also be connected to the stack inputs of

other mixer/multiplexers to make a larger mixer.

4.1.8 Bus Outputs

A 3-pin removable barrier block plug is used to

connect to the bus audio output of each channel.

The bus outputs are isolated switchable outputs that

can be turned on when needed by the IQ System.

This allows many multiplexers to be tied together on

the same bus without loading down the outputs.

4.1.2 Baud Rate and Parity Switch

A 6-section DIP switch is used to set the baud rate

and parity for RS232 serial communication. This is

only necessary when the unit is to serve as system

interface. Important:The baud rate should only be

set with the power cord disconnected from the

AC supply.

4.1.9 Stack Audio Inputs

Two unbalanced stack inputs are provided (one per

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

output channel) via RCA pin jacks. Each input en-

ters the mix of the respective output channel at unity

gain, and without manual or computer input control.

These stack inputs allow you to multiply the number

of audio inputs by stacking 2, 3, or more units to

build a larger mixer. See section 5.1.4 for more infor-

mation about forming larger mixers.

affect VCA gain in real time. Gain may also be ma-

nipulated in real time from alternate third-party con-

trol systems or devices. In manual mode, once VCA

gains are set via the PC (or control device) the

processor maintains those settings until it receives

an instruction to change.

4.2.2 Input Level Monitors

4.1.10 Crown Bus Connector

Audio level monitors are provided for each input.

The level is sensed between the preamp and VCA's,

with a range of –40 to +25 dBu.

A 4-pin removable barrier block connector is pro-

vided for digital communication via the Crown Bus

serial data loop to other IQ components. A ground

lug is provided to connect an optional shield for the

Crown Bus input.

4.2.3 Output Level Monitors

Audio level monitors are provided for each output.

The level is sensed at each output mix bus with a

range of –40 to +25 dBu.

4.1.11 Crown Bus Ground Connector

This chassis ground stud is provided to connect an

optional shield for the Crown Bus cable. Only the

shield of the input cable should be connected.

Shielded wire will reduce the total distance a Crown

Bus loop can be run, but shielding may be neces-

sary to reduce interference with certain kinds of

audio cables. See section 5.5 for more information

about wiring the Crown Bus.

4.2.4 Bus Output Relays

Audio bus outputs can be switched on and off with

software controlled isolation relays.

4.2.5 VCA Gain Controls

Each input may be routed to either or both outputs

by VCAs under processor control. The processor

may, in turn, be set up to control VCAs using on

board automatic intelligence or may be controlled in

real time manually from software. The VCAs offer a

control range of –100 to +25 dB.

4.1.12 RS232 Serial Computer Port

A 9-pin DB9 serial computer port is provided for

direct communication with a computer. The mixer/

multiplexer is capable of serving as a system inter-

face for up to 20 IQ mixer/multiplexers.

Automatic Mixing Features

The following features make up the Automatic Mix-

ing Feature Set, and are only functional when the

mixer/multiplexer is in Auto mode. All features are

common to the IQ–AMB-5 and IQ–SMX-6 unless

otherwise stated.

4.1.13 Sensing AUX Port

A TB-3M type “mini-XLR” connector is provided for

AUX input and output. This port may be used to

provide a control signal or sense a control signal.

Pin 1 is ground reference. Pin 2 is a sensing input. A

signal between +5 to +30 VDC is sensed as a logic

high. Because the circuit floats, the input line must

be tied to ground or a control voltage source to be

used. Pin 3 is output under processor control. When

on, it provides 10 VDC at 16 ma, and when off, it is

effectively an open circuit (high impedance). Sec-

tion 6.2 describes example applications for the AUX

port.

4.2.6 Gate

The gate feature shuts off or attenuates inputs when

not in use. This feature is particularly useful to pre-

vent feedback caused by too many open micro-

phone channels. There are four parameters which

control this feature:

• Max Gain control: used to set the maximum

gain for an input to one of the two outputs when

Auto is turned on. The Max Gain setting has

different effects when different Auto functions

are active. For example, when the Gate func-

tion is activated the Max Gain will be the “gate

open” level. When then Input Compressor/Lim-

iter function is activated, it acts as the “limit,”

the upper gain achieved when no compression

is taking place.* Control range is from –100 to

4.2 Computerized Control and Monitoring

The following features are controlled and monitored

via IQ software.

4.2.1 Manual/Auto Mode

This feature switches the mixer/multiplexer between

Manual and Automatic modes. When in Manual

mode, you may make changes from software that

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+25 dB in /2-dB steps.

• Compression Ratio: the amount of compres-

sion that is applied for every step over the

Threshold. Choices are 1:1, 2:1, 4:1, 8:1, 16:1,

32:1, infinity:1.

• Gate Threshold: the input level above which

the gate will “open” and below which the gate

will “close.” Control range is from –100 to +25

dB in ¹/2-dB steps.

• Release Time: determines how long it takes for

the gain to return to normal once the level

drops below the Threshold. Control range is

from 0.2, to 30 seconds.

• Low Set: the gain setting that will be used

when the gate is “closed.” Control range is

from –100 to +25 dB in ¹/2-dB steps.

• Slow Compression (IQ–SMX-6 only): This

control applies to all input channels. When

Slow Compression is set to off, the compressor

is set to the fastest attack time possible. This

will be very fast—so fast the compressor can

stop extremely sudden transients like the

sound caused by a dropped microphone. This

is a good setting for rapid speech. You can

turn the Slow Compression on for more gentle

sound sources such as most music.

• Delay: determines how long the gate will stay

open after the incoming signal drops below the

Threshold. Control range is from 0.2 to 30 sec-

onds.

4.2.7 Duck Priority

“Ducking” is the attenuation of an input when an-

other input with a higher priority is activated by the

Gate function. When the higher priority gate opens,

all inputs with lower priorities drop or “duck” to their

Low Set values. Up to six levels of priority can be

established between input channels. With the IQ–

SMX-6, each output channel can have a different

priority structure. There are two different parameters

which control this feature:

4.2.9 Auto Level

Auto Level is designed to control long-term changes

in signal level. With Auto Level on, the average

output level can be kept relatively constant over a

longer time interval while transients are allowed to

pass. Auto Level creates a more natural sound with

increased dynamic range. There are five different

parameters which control this feature:

• Duck Priority On/Off: turns this feature on or

off.

• Duck Priority Level: a setting from 1 to 6

where 1 is highest priority and 6 is lowest prior-

ity. Each VCA is set independently.

• Auto Level On/Off: This control turns the func-

tion on or off for the indicated input/output

channel.

4.2.8 Input Compressor

• Max Gain: the upper limit for input gain. This

level serves as a gain “ceiling” when the Auto

Level function is attempting to raise the gain on

a low-level signal. Control range is from –100 to

The input compressor/limiter function “reins in”

input signals that suddenly become too loud.

The compressor is a feed-forward type, which

performs the compression after the level sen-

sor. This allows it to work more smoothly than

conventional-type compressors. There are pa-

rameters which control this feature:

+25 in /2-dB steps

• Auto Level control: sets the desired average

output level. This level can best be understood

as a “target” level. If the output signal level is

above this level, the gain will be reduced to at-

tempt to hit this target. Likewise, if the output

signal is lower than this level, the gain will be

increased. In no case will the gain level be set

to greater than Max Gain. Control range is from

–100 to +25 in ¹/2-dB steps.

• Compressor/Limiter On/Off: This control

turns the function on or off for the indicated in-

put/output channel.

• Max Gain: the gain setting when no compres-

sion is taking place. Control range is from –100

to +25 in /2-dB steps.

• Threshold: the input level above which com-

pression begins. A signal at this level or below

is not affected. Control range is from –100 to

• Idle Gain: controls the initial gain when the

gate first opens. Idle Gain can be thought of as

the “starting gain” because it overrides the Max

Gain when the gate opens, and can compen-

sate for undesirable side-effects caused by

Max Gain being set above the Auto Level

value. Start with Idle Gain equal to Max Gain.

+25 in /2-dB steps.

* There is only one Max Gain that is shared among all of the Auto functions

that use it. This means that if you change the Max Gain on one page of the

Auto functions, the Max Gain is changed for all pages.

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If the level audibly drops each time the gate

opens, try a lower value for Idle Gain. Idle gain

should never be set to a value greater than Max

Gain. Control range is from –100 to +25 in /2-

dB steps.

4.2.11 Gate Count

The Gate Count function keeps track of how many

gates are open at a time, and provides feedback

control when a large number of inputs are open.

The Gate function must be on for the Gate Count to

operate. There are four parameters which control

this feature:

• Reaction Time: the time in seconds to adjust

gain 10 dB toward the necessary gain structure

to obtain the desired average output level.

Control range is from 0.2, to 30 seconds.

Gate Count Master: a master ON/OFF switch for

each output that enables or disables gate

counting for that output.

• Auto Level Gate Function: a global setting

that may be set to “Open To Idle Gain” or

“Open To Last Position.” When set to “Open To

Idle Gain” an input will initially gate on to the

Idle Gain setting and the auto level feature will

take over from that point. When set to “Open To

Last Position” the auto level feature remembers

the gain of the VCA at the time the input last

gated off so that gain goes back to that level

the next time the gate opens.

Gate Count: an ON/OFF switch for each VCA

that configures which inputs may participate in

the gate count.

Gate Count Level: determines how much each

input is attenuated as more gates open. When

only one mic in a count group is active, there is

no added attenuation. Each additional open

mic increases the attenuation by the “Count

Level.” Control range is from 0.5 to 16 dB.

4.2.10 Output Compressor

Max Gain: the gain setting that will be used when

the gate is “open,” and no further attenuation is

indicated. Control range is from –100 to +25 in

¹/2-dB steps.

The Output Compressor/Limiter function keeps the

output from exceeding a predetermined level. It's

especially valuable when used as an output limiter

for the protection of amplifiers, loudspeakers and

other audio equipment. Compression of the signal at

each input occurs only when the mix exceeds the

limit threshold. There are six parameters which con-

trol this feature:

4.2.12 Ambience (IQ–AMB-5 only)

The Ambience function monitors the ambient sense

input (Input 6) and automatically adjusts the mix

output level of Channel 1 up or down accordingly.

This enables the IQ–AMB-5 to automatically mix and

control the overall loudness in an environment with

background noise levels that vary. Functionally, the

ambience function operates after all other functions

have processed the audio signals. There are six

parameters which control this feature:

• Compressor: a master ON/OFF switch for

each output that enables or disables output

compression for that output.

• Limiter: an ON/OFF switch for each VCA that

configures which inputs may participate in out-

put compression.

Ambience: an On/Off switch that enables of dis-

ables the Ambience feature

• Limit Threshold: used to set the peak signal

level above which compression occurs. Con-

trol range is from –100 to +25 in ¹/2 dB steps.

• Attack Time: determines how rapidly the Am-

bience function will begin to increase the out-

put level of Channel 1 above the Ambient offset

level once the level of Input 6 exceeds the

Threshold. Control range is from 0.2 to 30 sec-

onds.

• Compression Ratio: controls the amount of

compression that is applied for every step over

the Threshold. Choices are 1:1, 2:1, 4:1, 8:1,

16:1, 32:1, infinity:1.

• Release Time: determines how long it takes for

the gain to return to normal when the level

drops below the Threshold. Control range is

from 0.2 to 30 seconds.

• Decay Time: determines how rapidly the Am-

bience function will begin to reduce the output

level of Channel 1 while the ambient sense in-

put level is dropping. Control range is from 0.2

to 30 seconds.

• Max Gain: the gain setting of the input when no

compression is active. Control range is from –

100 to +25 in ¹/2-dB steps.

• Expansion Ratio: determines how much the

gain of output Channel 1 will increase for every

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increase in the ambient signal level above the

Threshold setting. A 4:1 Expansion Ratio set-

ting will raise the output gain 1 dB for every 4

dB that the ambient signal increases. Choices

are 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 4:1, and 5:1.

the Crown Local Net nor the IQ–SMX-6 units

will function properly if more than one unit is se-

lected as a master.

• External Functions On/Off: setting this control

to ON allows the IQ–SMX-6 to participate in the

Crown Local Net.

• Threshold: determines at what ambient sound

level the Ambience function will begin to oper-

ate. It is the sound pressure level of the ambi-

ent sensing input (Input 6). When the signal

level of Input 6 exceeds the Threshold setting,

the Ambience function begins to increase the

gain of Channel 1 at a rate dictated by the Ex-

pansion Ratio control. Control range is from

–100 to +25 dB in ¹/2-dB steps.

• Duck On/Off: setting this control to ON allows

the IQ–SMX-6 to respond to external Duck Pri-

ority functions.

• Gate Count On/Off: setting this control to ON

allows the IQ–SMX-6 to respond to external

Gate Count functions.

• Ambient Offset: the level below Max Gain to

which the Channel 1 gain will be set until the

ambience level exceeds the Threshold setting.

As the ambience level increases above the

Threshold setting, the Channel 1 gain will be

increased above the Ambient Offset according

to the Expansion Ration setting. The Max Gain

setting always limits the maximum possible

gain which any input can receive. Control

range is from 0 to +40 dB in ¹/2-dB steps.

5 Technical Information

Following is a technical description of the operation of

the IQ–AMB-5 and IQ–SMX-6 mixer/multiplexers. Re-

fer to the block diagrams on the following pages for

illustration of signal flow.

5.1 Audio

5.1.1 Input Section

Each audio input signal first passes through a bal-

anced filter designed to eliminate RF interference. The

RF filters are a balanced network of chokes, ferrite

beads and capacitors that attenuate both common-

mode and differential-mode signals above 500 kHz.

Optional input isolation transformers can also be

added by the factory.

4.3 Crown Local Net (IQ–SMX-6 only)

The Crown Local Net (CLN) allows multiple IQ–SMX-

6 units to be linked so that their Duck Priority and

Gate Count functions work together. For example, a

duck priority 1 in one unit will override a priority 2 in

another unit. Likewise on the gate count side, the

number of open mics can be totaled among all the

IQ–SMX-6 units in a CLN and all open inputs attenu-

ated to prevent feedback in a large system. Use of

this feature requires that the serial port of each IQ–

SMX-6 be dedicated to CLN use, meaning that if the

IQ–SMX-6 is to be used with CLN, it cannot be used

as a system interface. Successful setup of a CLN

requires that the setup be performed in a particular

sequence of steps. Please refer to the IQ software

documentation for setup procedures. There are five

parameters which control this feature:

The signal then enters the input switching circuit. This

circuit can insert a 25 dB pad for line level signals or

apply phantom power to the input terminals (44 volts

through two 6810 ohm resistors). The signal is filtered

again to eliminate lower-frequency RF energy such as

interference from the AM broadcast band. The signal

then goes to the preamp stage.

Each of the six input preamplifier stages is a balanced

circuit providing from 13 to 46 dB of voltage gain. The

preamp consists of a pair of low-noise transistors, fol-

lowed by a high performance op-amp. The transistors,

in effect, convert the input voltage to a current while

maintaining reasonably high input impedance. Their

transconductance (output current divided by input

voltage) depends on the setting of the gain control.

The op-amp then converts the current back to a volt-

age to drive subsequent circuits.

• System On/Off: activates the Crown Local

Net. This control should only be turned on

for the first time after all of the following pa-

rameters have been set. Please refer to the

IQ software documentation for setup proce-

dures.

• Master On/Off: selects the master IQ–SMX-6

as required by the start-up procedure. Only

one IQ–SMX-6 should be the master. Neither

5.1.2 VCA Sections

Each preamplifier output drives two VCAs which then

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drive the two current-summing mix buses. The stack

inputs also feed into the mix buses. The VCA's derive

their control voltages from a multiplexer circuit driven

from the microprocessor. The microprocessor uses

onboard algos or commands from a host computer to

control the VCAs. Levels can be set in 1/2 dB incre-

ments from 25 dB gain to 100 dB attenuation (which is

considered “off”).

5.2.3 D/A Converter

To set channel gain levels, a digital-to-analog con-

verter continuously converts all gain settings to control

voltages. An analog de-multiplexer sends the appro-

priate control voltages to each of the twelve VCAs.

5.2.4 Log Amp and A/D Converter

The A/D converter scans through an eight-channel

multiplexer to read the input and output signal levels.

When a channel is selected, the signal is sent through

a logarithmic amplifier for increased dynamic range.

This analog voltage is then converted to a binary num-

ber that the microprocessor can read. The processor

can then mathematically increase detector time con-

straints, perform averaging or other response func-

tions.

5.1.3 Output Section

The two mix buses are sent to the corresponding main

output and auxiliary bus output stages. All output

stages are active, balanced and can drive 1200 ohms

to +26 dBu or 600 ohms to +20 dBu. The auxiliary bus

output stages have internal relay contact which can

connect or disconnect the signal to the auxiliary bus

output connector. These contacts are controlled by the

host computer and thus allow programmed signal

routing. Optional output isolation transformers can also

be added by the factory.

5.3 Auxiliary Port

Auxiliary devices such as supplemental cooling fans

can be remotely controlled via the AUX output on the

unit. When the auxiliary control feature is turned on by

the host computer, 10 VDC is supplied across pin 3

and pin 1 (ground) of the male 3-pin AUX connector.

This port can control solid state relays, and since it has

a current-limit resistor (16 mA max.), it can directly

drive an LED or opto-coupler.

5.1.4 Level Sense Circuits

The output of each input preamp and each mix amp is

monitored by a corresponding level detector. Each

level detector tracks the peak level of the signal and

releases with a time constant of about 85 ms. The eight

levels are sent to a multiplexer and the A/D converter.

The AUX input function is used by applying a 5-30

VDC signal to pin 2 (with pin 1 as ground). A high or

low signal here will be communicated to the host com-

puter. A logic low can be less than 0 volts (negative);

the signal is internally clamped for circuit protection.

5.2 Control and Interface Section

The host computer communicates with the unit micro-

processor either through an outboard IQ interface (like

the IQ–INT-II) via the Crown Bus, or directly through the

RS232 port. Each unit acts only on commands with an

address matching its own.

5.2.1 Crown Bus Interface

The serial loop (Crown Bus) connections on the unit

are made with an opto-isolated 4-pin removable bar-

rier block connector and a ground stud for the optional

connection of shielded wire. To prevent ground loops,

only the input cable's shield should be connected.

These connections conform to IQ System standards,

which allow the host computer to control numerous IQ

components with the same computer program.

5.2.2 RS232 Interface

Depending on selected options, the DB9 connector

can be used to communicate directly with the host

computer for setup or control of a Crown Bus loop, or

(IQ–SMX-6 only) for connection to an RS232 Crown

Local Net.

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Figure 5.1 IQ–AMB-5 Block Diagram

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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Figure 5.2 IQ–SMX-6 Block Diagram

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source. Setting the source signal level to approxi-

mately 0 dBu will provide 20 dBu of headroom in the

input preamp. Some recommended settings are given

in Figure 6.2.

6 IQ Audio In Depth

This section provides additional information about

Crown’s IQ System with special guides to aid in the

installation and use of the IQ–AMB-5/IQ–SMX-6. For

more information about any of these topics, contact

the Crown Technical Support Group.

Figures 6.3-4 show the normal wiring for balanced and

unbalanced inputs. It is also possible to parallel the

inputs of multiple units to increase the number of mixer

outputs. For example, the inputs of two 6x2 IQ–SMX-6s

can be paralleled to create a 6x4 mixer. This technique

is described in Section 6.1.5.

6.1 A Closer Look at Audio Signal Wiring

6.1.1 Input

Three-terminal removable barrier block connectors are

provided for the audio inputs. Each input has an input

selector switch. Slide it to the left (M) for microphone

signal levels up to +7 dBu (0 dBu = 0.775 volts). Select

the center position (L) for line level signals up to +32

dBu. Slide it to the right (P) to provide 44 VDC to mics

requiring phantom power.

Figure 6.1 An Audio Input Section

Each input has a screwdriver-set, calibrated gain con-

trol to compensate for different input source levels. The

slot on the control shaft points to the gain setting. The

settings are labelled for line-level input. Add 25 dB to

the scale if the inputs are switched for microphone

level signals.

Use a screwdriver to adjust the gain pot so that the

input signal level plus gain equals roughly 0 dBu. You

will need to know, or estimate, the level of the input

Figure 6.3 Balanced Audio Input Wiring

Pro Audio

equipment

Semi-pro or

consumer

equipment

Dynamic

Condenser

Hot

Dynamic

mic, music

Hot

condensor

mic, music

Close-miked Close-miked

mic, speech mic, speech condenser

mic, speech

dynamic

mic,

bass/drums

dynamic mic,

kick drum,

guitar amp

dBm/dBV

dBu

+4 dBm

+4 dBu

–4 (L)

–10 dBV

–8 dBu

+8 (L)

–75 dBV

–73 dBu

+21 (M)

–65 dBV

–83 dBu

+11 (M)

–45 dBV

–43 dBu

+18 (P)

–55 dBV

–53 dBu

+21 (M)

–25 dBV

–23 dBu

–2 (P)

–15 dBV

–13 dBu

–12 (M)

–5 dBV

–3 dBu

Suggested

Setting

–12 (M) or

+3 (L)

0 dBm = 0.775 VRMS with a 600 ohm load, 0 dBV = 1 VRMS, 0 dBu = 0.775 VRMS

Fig. 6.2 Suggested Audio Input Gain Control Settings

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Balanced sources should be wired as shown in Figure

6.3. Notice that the shield is not connected to the

chassis ground of the source if the source is also

connected to the AC ground (that is, it has a grounded

AC plug). This prevents unwanted ground loops.

5 the paging level at a train station can be automati-

cally adjusted so pages can be heard over the roar of

an incoming train and yet quieted to an appropriate

level during periods of softer ambient sound levels.

The sensing input section of the back panel is shown

in Figure 6.5 below. It has the same features as the

other mic/line inputs: input gain control and input level

switch.

Floating

Shield connected

to ground terminal

source

Output

SENSE

ADD 25

FOR MIC

-5

-10

-12

INPUT

2-wire line cord

(or battery power)

–

M L P

–

Grounded

source

Shield not connected

at this end

Figure 6.5 Sensing Input Section

Output

The most common use of the sensing input is to con-

nect a microphone (such as a Crown PZM^®) and lo-

cate the microphone so that it can accurately receive

the ambient sound level. Great care must be taken in

the placement of the ambient sensing microphone so

that it is not too close to the loudspeakers being driven

by the system.

INPUT

3-wire grounded line cord

(or other ground connection)

Floating

source

Shield connected to both negative

(–) and ground input terminals

Output

It is also possible to connect more than one ambient

sensing microphone to the sense input. This can be

accomplished by taking advantage of the manual mix-

ing function of Channel 2. Simply connect each ambi-

ent sensing microphone to one of the five regular

inputs of the IQ–AMB-5 and use the IQ software to

assign each of them to Channel 2 only. Switch the

sense input to the line-level position (L) and connect

the main audio output of Channel 2 to it. Use the IQ

software to control the level of the ambient sensing

microphones. The microphones which are located in

more critical areas can be set to a higher level so they

will trigger the level controller first.

INPUT

2-wire line cord

(or battery power)

–

Grounded

source

Input ground

terminal not used

Output

INPUT

3-wire grounded line cord

(or other ground connection)

Figure 6.4 Unbalanced Audio Input Wiring

Be sure the microphone has adequate sensitivity for

the spectral content of the ambient sound. For ex-

ample, a microphone with a bandwidth designed

solely for speech reinforcement may not have ad-

equate low-frequency sensitivity to pick up the low-

frequency noise of machinery in a factory.

Unbalanced sources should be wired as shown in

Figure 6.4. The examples in Figure 6.4 are grouped

according to whether twin-lead shielded wire or single-

conductor coax (and twisted pair) wire is used.

6.1.2 IQ–AMB-5 Ambient Sensing Input

6.1.3 Output

In addition to its automatic mixing capabilities, the IQ–

AMB-5 also has the ability to adjust the output level of

Channel 1 to the ambient sound level. (Remember,

Channel 2 functions manually only). It does this with its

sensing input (input 6). For instance, with an IQ–AMB-

Three-terminal removable barrier block connectors are

provided for audio output (Figure 3.15). Both “main”

and “bus” outputs are provided for each of the two

mixer channels. They are balanced and can drive 1200

ohms or more to +26 dBu or 600 ohms to +20 dBu.

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Each bus output can drive any number of inputs within

this impedance range.

Both main and bus outputs are wired the same way.

Balanced output wiring is shown in Figure 6.7.

Notice that the shield is not connected to the output

ground terminal if the load is connected to AC ground.

This prevents unwanted ground loops. Unbalanced

output wiring is shown next.

STACK

AUDIO

OUT

1 _MAIN

BUS

– +

–

Figure 6.6 Audio Output Section

The main audio outputs are provided for connection

with other audio equipment such as power amplifiers.

They can also be “stacked” with the outputs of other

mixer/multiplexers to increase the number of mixer in-

puts For example, two 6x2 IQ–SMX-6s can be stacked

to create a 12x2 mixer. This is described in Section 6.1.4

The bus outputs are turned on or off by relays and func-

tion like the AUX “send” outputs on a conventional mix-

ing console. They are switched on or off by the IQ

System. This special design allows many bus outputs

to be connected to a common audio bus in a multiple-

zone network (like a large airport paging system). Be-

cause the bus outputs are controlled by the IQ System,

they can be kept off until they are actually used, pre-

venting too many of them from being on at the same

time and loading down a common audio bus network.

Figure 6.8 Unbalanced Audio Output Connections

6.1.4 Stack Inputs

the “stack in” jacks (Figure 6.6) enable the audio inputs

to be increased by stacking 2, 3 or more mixer/multi-

plexers to create a 12x2, 18x2 or wider mixer. Use 2-

conductor shielded cable to route the signal from the

main output of one unit to the stack input (RCA phono

jack) of the second unit. Use the outputs of the last unit

in the stack for connection to amplifiers or other exter-

nal audio equipment.*

The versatile bus outputs can be used for any audio

system where switchable outputs are desired, such as

switchable recording outputs.

12 INPUTS

MAIN

OUT

STACK

SMX-6

OUTPUTS

STACKED

OUTPUTS

Figure 6.9 A 12x2 Mixer Using 2 Mixer/Multiplexers

Stacking mixer/multiplexers can create an almost un-

limited number of inputs; however, there will still only be

two main and two auxiliary bus outputs for connection

to other equipment. See Section 6.1.5 to find output how

to increase the number of outputs.

Figure 6.7 Balanced Audio Output Connections

* The level of each signal on the stacked ouput bus is controlled by the unit

having the signal as an input.

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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The correct way to wire stacked units is shown below:

To signal

source

STACK

AUDIO

OUT

AUDIO

OUT

First

Unit

1 _MAIN

MAIN

BUS

AUDIO

ADD 25

First

FOR MIC

-5

Unit

-10

-12

-10

–

-12

–

3-pin output connector

–

(–) No connection

Do NOT tie ground terminals

of parallel inputs together

2-conductor shielded cable

Connect ground ( ) from

output to phone plug shield

Connect shield to ground

terminal of input ONLY

Phone (RCA) plug

AUDIO

ADD 25

AUDIO

ADD 25

Second

STACK

AUDIO

OUT

AUDIO

OUT

FOR MIC

Second

Unit

-5

Unit

-10

-12

-10

-12

1 _MAIN

MAIN

BUS

phantom

power

–

Figure 6.10 Stacking the Outputs of Multiple Units

Figure 6.12 Paralleling the Inputs of Multiple Units

6.1.5 Paralleling inputs

By using several units and a combination of parallel

inputs and stacked outputs, larger mixing configura-

tions (12x8, 24x4, etc.) can be created as shown be-

low:

When using more than one unit, the inputs may be

wired in parallel to increase the number of outputs that

a source can drive. This is shown in Figures 6.11-12.

For example, the audio signal in Figure 6.12 which

feeds Input 1 is available to the outputs of both units,

creating a 6x4 mixer.

12 INPUTS

MAIN

OUT

STACK

6 INPUTS

SMX-6

PARALLELED

INPUTS

SMX-6

PARALLELED

INPUTS

OUTPUTS

SMX-6

OUTPUTS

SMX-6

STACKED

OUTPUTS

6x8

SMX-6

Figure 6.13 A 12x8 Mixer Using 8 Mixer/Multiplexers

Figure 6.11 A 6x8 Mixer Using 4 Mixer/Multiplexers

Important: If the source is a microphone which re-

quires phantom power (P), select it only at the first

input. Switch all other parallel inputs to mic (M).*

* When mixer inputs are paralleled, the total input impedance will drop by 1/

N where N is the number of inputs to be connected. Depending on the signal

source, this may place a limit on the number of possible outputs.

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

When the Aux port is turned on by the IQ System it

provides 10 VDC across pins 3 (+) and 1 (ground). An

internal 1.5 K ohm resistor limits the current to a maxi-

mum of 16 mA. This is shown below in Figure 6.15.

6.2 Using the AUX Port

There are many possible uses for the AUX output. For

example, it can be used to turn on auxiliary cooling

fans. To do this the AUX connector might be used to

close a relay. The relay would then turn the fans on or

off. This is shown in Figure 6.14.

The solid state relay shown (Crown part number D

7308-7) can be ordered from the Crown Parts Depart-

ment.

The Aux port uses a male 3-pin mini XLR connector

which is located above the DB9 connector (Figure

2.1). Use a Switchcraft^®TA3F cable connector or

equivalent to make the connection.

AUX

CONNECTOR

GND

10 V

SOLID

STATE

RELAY

INPUT

–

(C 7308-7)

Figure 6.15 Internal Auxiliary Circuit

110 VAC

AUXILIARY

EQUIPMENT

Notice in Figure 6.15 that the AUX connector can be

used to sense the presence of an input signal across

pins 2 (+) and 1 (ground). It is a high impedance input

and includes a pull-down resistor.

Figure 6.14 Sample Auxiliary System Wiring

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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6.3 The Mixer/Multiplexer as a 1-Loop IQ

Interface

The mixer/multiplexer can serve a an IQ interface

between a host computer and a single Crown Bus

loop for other IQ–AMB-5/IQ–SMX-6 units only. This

can eliminate the need for an external IQ Interface

(IQ-INTII) in a small system. The mixer/multiplexer

connects directly to the host computer via the DB9

serial connector. Switches accessed through the

side of the chassis are used to select the parity and

baud rate. See Section 3.2 for specific instructions

on wiring and switch settings.

CLN Interface

RS232

CLN Interface

RS232

CLN Interface

RS232

Figure 6.16 A Crown Local Net RS232 Serial Loop

While 250 IQ components of each type can be con-

trolled on a single Crown Bus loop, it is recom-

mended that no more than 20 units be connected to

an mixer/multiplexer. This is because of the tremen-

dous timing demands on their microprocessors.

More than 20 IQ components may cause timing

problems.

Important: The Crown Local Net must make a

complete loop. If the last unit in a group is not

connected to the first unit, the system will not

function.

Important: The Crown Local Net depends on

proper IQ address assignments, even if the sys-

tem will not be installed with a Crown Bus loop.

Each unit in a Crown Local Net must have a

different IQ address. See Section 3.2 for details.

6.4 Crown Local Net (IQ–SMX-6 only)

Crown Local Net (CLN) is available only for an IQ–

SMX-6. It enables multiple IQ–SMX-6s to be inter-

connected via a CLN. This is an RS232

communication loop designed for local communica-

tion between IQ components apart from the Crown

Bus. IQ–SMX-6s can use this option to communi-

cate the total number of open mics in the system as

well as their individual ducking priorities. In this way,

one IQ–SMX-6 will know how many mics are being

used by other IQ–SMX-6s and can take appropriate

action to prevent feedback or implement priority

switching (ducking) of mics.*

As more diverse IQ communications are needed,

the Crown Local Net will be available to move infor-

mation directly between IQ components without af-

fecting the performance of a host computer.

6.4.1 Wiring the Crown Local Net

A Crown Local Net is a serial loop (Figure 6.16).

With two exceptions, a Crown Local Net loop is

wired the same as standard RS232 wiring, except

the Crown Local Net does not use handshaking

therefore pins 7 and 8 (RTS/CTS) are not used.

Figure 6.17 shows the wiring for a 3-unit Crown

Local Net. If more units are desired, simply add

another unit and follow the same pattern for wiring.**

Figure 6.17 Crown Local Net Wiring

* Because Loop IQ Interface and CLN use the same DB9 connector, they

cannot be used at the same time. This means that IQ–SMX-6s to be used in

a CLN will need to be connected to a Crown Bus via an external IQ interface

for setup.

** Pin 5 should not be used as a ground if the units are already properly

grounded. The wire used for RS232 communication is usually unsuitable for

use as a ground.

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

Outside RF interference is seldom a problem for a

Crown Bus loop—especially if shielded twisted-pair

wire is used. However, there are extreme situations

when fiber optic wiring is recommended. For example,

locating a Crown Bus loop next to an AM radio trans-

mission line may require fiber optic cabling. An ex-

tremely long Crown Bus loop distance may also

require fiber optic cabling.

6.5 A Closer Look at Crown Bus Wiring

The Crown Bus is a serial communication loop de-

signed to transmit IQ commands and data. As imple-

mented in the IQ mixer/multiplexer, it is a 20 mA current

loop operating at a baud rate of 38.4 K.

The Crown Bus connection can use inexpensive

twisted-pair wiring (shielded or unshielded) and it must

be unbroken. If fiber optic cabling is required, contact

the Crown Technical Support Group (see Section 8 for

contact information)

Here are some guidelines for twisted-pair wiring:

• When interference is a problem, use shielded

twisted-pair wire at least 26 AWG in size. The

wire should be of good quality and should have

low capacitance—30 pF/foot or less is good. The

shield serves two purposes: First, it helps prevent

the IQ data signal from transmitting to nearby au-

dio wiring. Second, it helps prevent outside RF

from interfering with the data signal. However, in

most cases interference is not a problem and,

since unshielded wire has lower capacitance, it is

a better choice.

• Minimize the total capacitance of a Crown Bus

loop. The total capacitance should be less than

30 nF. Allow approximately 60 pF for each IQ

component in a loop. This accounts for a slight

signal degradation which occurs as data signals

pass through a component.

• Add an IQ Repeater for very long loops—greater

than 1,000 feet (305 m)—or when required by

high-capacitance wire. Although we recommend

adding a repeater for loops longer than 1,000

feet, it is often possible to go 2,000 feet (610 m) or

more. The most significant characteristic of the

wire is its capacitance. Lower capacitance allows

longer loops. Unshielded wire usually has less

capacitance.

• Never use the ground wire in a mic snake line.

It may sometimes be convenient to run Crown

Bus data signals to and from stage monitor ampli-

fiers along unused wire pairs in a mic snake. Do

not use the ground wire which is normally con-

nected to pin 1 on an XLR connector or data

noise will be added to the audio lines. Use only

the signal lines which normally connect to pins 2

and 3 of the XLRs.*

* Because typical mic cables have high capacitance, the maximum possible

Crown Bus loop distance will be less.

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

7 IQ Address Tables

This section contains lookup tables for every valid IQ ad-

dress. The valid addresses are 1 to 250. Do not use an

address number higher than 250! Addresses above 250

are reserved for special system use.

which are connected to the same Crown Bus loop can

have the same address.

To use the IQ address tables, simply find the address

you want and set the IQ address switch of the mixer/

multiplexer as described in Section 3.2.1.

Remember: No two IQ components of the same type

IQ Address Switch

Address

OFF OFF OFF OFF OFF OFF OFF OFF

ON OFF OFF OFF OFF OFF OFF OFF

OFF ON OFF OFF OFF OFF OFF OFF

ON ON OFF OFF OFF OFF OFF OFF

OFF OFF ON OFF OFF OFF OFF OFF

ON OFF ON OFF OFF OFF OFF OFF

OFF ON ON OFF OFF OFF OFF OFF

ON ON ON OFF OFF OFF OFF OFF

OFF OFF OFF ON OFF OFF OFF OFF

ON OFF OFF ON OFF OFF OFF OFF

OFF ON OFF ON OFF OFF OFF OFF

ON ON OFF ON OFF OFF OFF OFF

OFF OFF ON ON OFF OFF OFF OFF

ON OFF ON ON OFF OFF OFF OFF

OFF ON ON ON OFF OFF OFF OFF

ON ON ON ON OFF OFF OFF OFF

OFF OFF OFF OFF ON OFF OFF OFF

ON OFF OFF OFF ON OFF OFF OFF

OFF ON OFF OFF ON OFF OFF OFF

ON ON OFF OFF ON OFF OFF OFF

OFF OFF ON OFF ON OFF OFF OFF

ON OFF ON OFF ON OFF OFF OFF

OFF ON ON OFF ON OFF OFF OFF

ON ON ON OFF ON OFF OFF OFF

OFF OFF OFF ON ON OFF OFF OFF

ON OFF OFF ON ON OFF OFF OFF

OFF ON OFF ON ON OFF OFF OFF

ON ON OFF ON ON OFF OFF OFF

OFF OFF ON ON ON OFF OFF OFF

ON OFF ON ON ON OFF OFF OFF

OFF ON ON ON ON OFF OFF OFF

ON ON ON ON ON OFF OFF OFF

OFF OFF OFF OFF OFF ON OFF OFF

ON OFF OFF OFF OFF ON OFF OFF

OFF ON OFF OFF OFF ON OFF OFF

ON ON OFF OFF OFF ON OFF OFF

OFF OFF ON OFF OFF ON OFF OFF

ON OFF ON OFF OFF ON OFF OFF

OFF ON ON OFF OFF ON OFF OFF

ON ON ON OFF OFF ON OFF OFF

OFF OFF OFF ON OFF ON OFF OFF

ON OFF OFF ON OFF ON OFF OFF

OFF ON OFF ON OFF ON OFF OFF

ON ON OFF ON OFF ON OFF OFF

OFF OFF ON ON OFF ON OFF OFF

ON OFF ON ON OFF ON OFF OFF

OFF ON ON ON OFF ON OFF OFF

ON ON ON ON OFF ON OFF OFF

OFF OFF OFF OFF ON ON OFF OFF

ON OFF OFF OFF ON ON OFF OFF

OFF ON OFF OFF ON ON OFF OFF

ON ON OFF OFF ON ON OFF OFF

OFF OFF ON OFF ON ON OFF OFF

ON OFF ON OFF ON ON OFF OFF

OFF ON ON OFF ON ON OFF OFF

ON ON ON OFF ON ON OFF OFF

OFF OFF OFF ON ON ON OFF OFF

ON OFF OFF ON ON ON OFF OFF

OFF ON OFF ON ON ON OFF OFF

ON ON OFF ON ON ON OFF OFF

OFF OFF ON ON ON ON OFF OFF

ON OFF ON ON ON ON OFF OFF

OFF ON ON ON ON ON OFF OFF

ON ON ON ON ON ON OFF OFF

OFF OFF OFF OFF OFF OFF ON OFF

ON OFF OFF OFF OFF OFF ON OFF

OFF ON OFF OFF OFF OFF ON OFF

ON ON OFF OFF OFF OFF ON OFF

OFF OFF ON OFF OFF OFF ON OFF

ON OFF ON OFF OFF OFF ON OFF

OFF ON ON OFF OFF OFF ON OFF

ON ON ON OFF OFF OFF ON OFF

OFF OFF OFF ON OFF OFF ON OFF

ON OFF OFF ON OFF OFF ON OFF

OFF ON OFF ON OFF OFF ON OFF

ON ON OFF ON OFF OFF ON OFF

OFF OFF ON ON OFF OFF ON OFF

ON OFF ON ON OFF OFF ON OFF

OFF ON ON ON OFF OFF ON OFF

ON ON ON ON OFF OFF ON OFF

OFF OFF OFF OFF ON OFF ON OFF

ON OFF OFF OFF ON OFF ON OFF

OFF ON OFF OFF ON OFF ON OFF

ON ON OFF OFF ON OFF ON OFF

OFF OFF ON OFF ON OFF ON OFF

ON OFF ON OFF ON OFF ON OFF

OFF ON ON OFF ON OFF ON OFF

ON ON ON OFF ON OFF ON OFF

OFF OFF OFF ON ON OFF ON OFF

ON OFF OFF ON ON OFF ON OFF

OFF ON OFF ON ON OFF ON OFF

ON ON OFF ON ON OFF ON OFF

OFF OFF ON ON ON OFF ON OFF

ON OFF ON ON ON OFF ON OFF

OFF ON ON ON ON OFF ON OFF

ON ON ON ON ON OFF ON OFF

OFF OFF OFF OFF OFF ON ON OFF

ON OFF OFF OFF OFF ON ON OFF

OFF ON OFF OFF OFF ON ON OFF

ON ON OFF OFF OFF ON ON OFF

OFF OFF ON OFF OFF ON ON OFF

ON OFF ON OFF OFF ON ON OFF

OFF ON ON OFF OFF ON ON OFF

ON ON ON OFF OFF ON ON OFF

OFF OFF OFF ON OFF ON ON OFF

ON OFF OFF ON OFF ON ON OFF

OFF ON OFF ON OFF ON ON OFF

ON ON OFF ON OFF ON ON OFF

OFF OFF ON ON OFF ON ON OFF

ON OFF ON ON OFF ON ON OFF

OFF ON ON ON OFF ON ON OFF

ON ON ON ON OFF ON ON OFF

OFF OFF OFF OFF ON ON ON OFF

ON OFF OFF OFF ON ON ON OFF

OFF ON OFF OFF ON ON ON OFF

ON ON OFF OFF ON ON ON OFF

OFF OFF ON OFF ON ON ON OFF

ON OFF ON OFF ON ON ON OFF

OFF ON ON OFF ON ON ON OFF

ON ON ON OFF ON ON ON OFF

OFF OFF OFF ON ON ON ON OFF

ON OFF OFF ON ON ON ON OFF

OFF ON OFF ON ON ON ON OFF

ON ON OFF ON ON ON ON OFF

OFF OFF ON ON ON ON ON OFF

ON OFF ON ON ON ON ON OFF

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

Figure 7.1 IQ Address Switch Settings from 0 to 125

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

IQ Address Switch

Address

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

OFF ON ON ON ON ON ON OFF

ON ON ON ON ON ON ON OFF

OFF OFF OFF OFF OFF OFF OFF ON

ON OFF OFF OFF OFF OFF OFF ON

OFF ON OFF OFF OFF OFF OFF ON

ON ON OFF OFF OFF OFF OFF ON

OFF OFF ON OFF OFF OFF OFF ON

ON OFF ON OFF OFF OFF OFF ON

OFF ON ON OFF OFF OFF OFF ON

ON ON ON OFF OFF OFF OFF ON

OFF OFF OFF ON OFF OFF OFF ON

ON OFF OFF ON OFF OFF OFF ON

OFF ON OFF ON OFF OFF OFF ON

ON ON OFF ON OFF OFF OFF ON

OFF OFF ON ON OFF OFF OFF ON

ON OFF ON ON OFF OFF OFF ON

OFF ON ON ON OFF OFF OFF ON

ON ON ON ON OFF OFF OFF ON

OFF OFF OFF OFF ON OFF OFF ON

ON OFF OFF OFF ON OFF OFF ON

OFF ON OFF OFF ON OFF OFF ON

ON ON OFF OFF ON OFF OFF ON

OFF OFF ON OFF ON OFF OFF ON

ON OFF ON OFF ON OFF OFF ON

OFF ON ON OFF ON OFF OFF ON

ON ON ON OFF ON OFF OFF ON

OFF OFF OFF ON ON OFF OFF ON

ON OFF OFF ON ON OFF OFF ON

OFF ON OFF ON ON OFF OFF ON

ON ON OFF ON ON OFF OFF ON

OFF OFF ON ON ON OFF OFF ON

ON OFF ON ON ON OFF OFF ON

OFF ON ON ON ON OFF OFF ON

ON ON ON ON ON OFF OFF ON

OFF OFF OFF OFF OFF ON OFF ON

ON OFF OFF OFF OFF ON OFF ON

OFF ON OFF OFF OFF ON OFF ON

ON ON OFF OFF OFF ON OFF ON

OFF OFF ON OFF OFF ON OFF ON

ON OFF ON OFF OFF ON OFF ON

OFF ON ON OFF OFF ON OFF ON

ON ON ON OFF OFF ON OFF ON

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

OFF OFF OFF ON OFF ON OFF ON

ON OFF OFF ON OFF ON OFF ON

OFF ON OFF ON OFF ON OFF ON

ON ON OFF ON OFF ON OFF ON

OFF OFF ON ON OFF ON OFF ON

ON OFF ON ON OFF ON OFF ON

OFF ON ON ON OFF ON OFF ON

ON ON ON ON OFF ON OFF ON

OFF OFF OFF OFF ON ON OFF ON

ON OFF OFF OFF ON ON OFF ON

OFF ON OFF OFF ON ON OFF ON

ON ON OFF OFF ON ON OFF ON

OFF OFF ON OFF ON ON OFF ON

ON OFF ON OFF ON ON OFF ON

OFF ON ON OFF ON ON OFF ON

ON ON ON OFF ON ON OFF ON

OFF OFF OFF ON ON ON OFF ON

ON OFF OFF ON ON ON OFF ON

OFF ON OFF ON ON ON OFF ON

ON ON OFF ON ON ON OFF ON

OFF OFF ON ON ON ON OFF ON

ON OFF ON ON ON ON OFF ON

OFF ON ON ON ON ON OFF ON

ON ON ON ON ON ON OFF ON

OFF OFF OFF OFF OFF OFF ON ON

ON OFF OFF OFF OFF OFF ON ON

OFF ON OFF OFF OFF OFF ON ON

ON ON OFF OFF OFF OFF ON ON

OFF OFF ON OFF OFF OFF ON ON

ON OFF ON OFF OFF OFF ON ON

OFF ON ON OFF OFF OFF ON ON

ON ON ON OFF OFF OFF ON ON

OFF OFF OFF ON OFF OFF ON ON

ON OFF OFF ON OFF OFF ON ON

OFF ON OFF ON OFF OFF ON ON

ON ON OFF ON OFF OFF ON ON

OFF OFF ON ON OFF OFF ON ON

ON OFF ON ON OFF OFF ON ON

OFF ON ON ON OFF OFF ON ON

ON ON ON ON OFF OFF ON ON

OFF OFF OFF OFF ON OFF ON ON

ON OFF OFF OFF ON OFF ON ON

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

OFF ON OFF OFF ON OFF ON ON

ON ON OFF OFF ON OFF ON ON

OFF OFF ON OFF ON OFF ON ON

ON OFF ON OFF ON OFF ON ON

OFF ON ON OFF ON OFF ON ON

ON ON ON OFF ON OFF ON ON

OFF OFF OFF ON ON OFF ON ON

ON OFF OFF ON ON OFF ON ON

OFF ON OFF ON ON OFF ON ON

ON ON OFF ON ON OFF ON ON

OFF OFF ON ON ON OFF ON ON

ON OFF ON ON ON OFF ON ON

OFF ON ON ON ON OFF ON ON

ON ON ON ON ON OFF ON ON

OFF OFF OFF OFF OFF ON ON ON

ON OFF OFF OFF OFF ON ON ON

OFF ON OFF OFF OFF ON ON ON

ON ON OFF OFF OFF ON ON ON

OFF OFF ON OFF OFF ON ON ON

ON OFF ON OFF OFF ON ON ON

OFF ON ON OFF OFF ON ON ON

ON ON ON OFF OFF ON ON ON

OFF OFF OFF ON OFF ON ON ON

ON OFF OFF ON OFF ON ON ON

OFF ON OFF ON OFF ON ON ON

ON ON OFF ON OFF ON ON ON

OFF OFF ON ON OFF ON ON ON

ON OFF ON ON OFF ON ON ON

OFF ON ON ON OFF ON ON ON

ON ON ON ON OFF ON ON ON

OFF OFF OFF OFF ON ON ON ON

ON OFF OFF OFF ON ON ON ON

OFF ON OFF OFF ON ON ON ON

ON ON OFF OFF ON ON ON ON

OFF OFF ON OFF ON ON ON ON

ON OFF ON OFF ON ON ON ON

OFF ON ON OFF ON ON ON ON

ON ON ON OFF ON ON ON ON

OFF OFF OFF ON ON ON ON ON

ON OFF OFF ON ON ON ON ON

OFF ON OFF ON ON ON ON ON

Figure 7.2 IQ Address Switch Settings from 126 to 250

IQ–AMB-5 / IQ–SMX-6 Reference Manual

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AMB-5 / SMX-6 IQ Mixer/Multiplexer

8 Factory Service

Always use the

original factory pack

to transport the unit.

To obtain factory service, fill out the service infor-

mation page found in the back of this manual and

send it along with your proof of purchase and the

defective unit to the Crown factory.

3. Do not ship the unit in any kind of cabinet (wood or

metal). Ignoring this warning may result in exten-

sive damage to the unit and the cabinet. Accesso-

ries are not needed—do not send the product

documentation, cables and other hardware.

For warranty service, we will pay for ground ship-

ping both ways in the United States. Contact Crown

Factory Service or Technical Support to obtain pre-

paid shipping labels prior to sending the unit. Or, if

you prefer, you may prepay the cost of shipping,

and Crown will reimburse you. Send copies of the

shipping receipts to Crown to receive reimburse-

ment.

If you have any questions, please call or write the

Crown Technical Support Group.

Your repaired unit will be returned via UPS ground.

Please contact us if other arrangements are re-

quired.

Crown Audio Customer Service

Technical Support / Factory Service

Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart,

Indiana 46517 U.S.A.

Factory Service Shipping Instructions:

1. When sending a Crown product to the factory for

service, be sure to fill out the service information

form that follows and enclose it inside your unit’s

shipping pack. Do not send the service informa-

tion form separately.

Telephone: 219-294-8200

800-342-6939 (North America,

Puerto Rico, and Virgin Islands only)

Fax:

219-294-8124 (Factory Service)

219-294-8301 (Tech Support)

2. To ensure the safe transportation of your unit to the

factory, ship it in an original factory packing con-

tainer. If you don’t have one, call or write Crown’s

Parts Department. With the exception of polyure-

thane or wooden crates, any other packing mate-

rial will not be sufficient to withstand the stress of

shipping. Do not use loose, small size packing

materials.

Fax Back: 219-293-9200 (North America only)

800-294-4094 (North America only)

219-294-8100 (International)

Internet:

Email:

http://www.crownintl.com

[email protected]

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Crown Factory Service Information

Shipping Address: Crown International, Inc., Factory Service, Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, IN 46517

Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8124

Owner’s Name: _________________________________________________________________________

Shipping Address: ______________________________________________________________________

Phone Number: _____________________________ Fax Number: _____________________________

Model: ________________________ Serial Number:______________ Purchase Date: ___________

NATURE OF PROBLEM

(Be sure to describe the conditions that existed when the problem occurred and what attempts were made to correct it.)

______________________________________________________________________________

Other equipment in your system: _________________________________________________________

______________________________________________________________________________

If warranty has expired, payment will be: ❏ Cash/Check ❏ VISA ❏ MasterCard ❏ C.O.D.

Card Number:___________________________ Exp. Date:_______ Signature:____________________________

ENCLOSE THIS PORTION WITH THE UNIT. DO NOT MAIL SEPARATELY.

IQ–AMB-5 / IQ–SMX-6 Reference Manual

Page 33

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