ComTech DriveCore Operation Manual
CT 475
CT 4150
CT 875
CT 8150
Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your local
Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
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.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
Trademark Notice: Com-Tech, BCA, Crown, Crown Audio, Amcron and Multi-Mode are registered trademarks of Crown International. IQwic,
PIP and PIP2 are trademarks of Crown International. Other trademarks are the property of their respective owners.
®
Some models may be exported under the name Amcron.
© 2011 by Harman International®, Inc. 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000
143368-1
4/11
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CT Power Amplifiers
DECLARATION of CONFORMITY
ISSUED BY: Harman International
1718 W. Mishawaka Road
Elkhart, Indiana 46517 U.S.A.
European Representative’s Name and Address:
David Budge
10 Harvest Close
Yateley GU46 6YS
United Kingdom
Equipment Type: Power Amplifiers
Family Name: CT series
Model Names: CT8150, CT875, CT4150, CT475
EMC Standards:
EN 55103-1:1997 Electromagnetic Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions
EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm and 1 M
EN 61000-3-2:2006 & Amd 1: 2008 & AMd 2 : 2009 Limits for Harmonic Current Emissions (equipment input current ≤16A per phase)
EN 61000-3-3:1998 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current ≤16A
EN 55022:2006 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B
EN 55103-2:1997 Electromagnetic Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity
EN 61000-4-2:2009 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)
EN 61000-4-3:2006 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, Criteria A)
EN 61000-4-4:2007 Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:2006 Surge Immunity (Criteria B)
EN 61000-4-6:2009 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)
EN 61000-4-11:2001 Voltage Dips, Short Interruptions and Voltage Variation
Safety Standard:
IEC 60065: 2001: 7Ed & Amd 1: 2005 Safety Requirements - Audio Video and Similar Electronic Apparatus
I certify that the product identified above conforms to the requirements of the EMC Council Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.
Signed
Scott Potosky
Title: Director of Engineering
Date of Issue: March 16, 2011
Operation Manual
page 3
Due to line current harmonics, we recommend that you contact your supply authority before connection.
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CT Power Amplifiers
Table of Contents
13.1 Protection Systems.........................................14
13.1.1 Thermal Indicator....................................14
13.1.2 Fault .......................................................14
13.1.3 High-Pass Filters....................................14
13.1.4 AC Under/Over Voltage Protection ..........14
13.1.5 Circuit Breaker........................................14
13.1.6 Convection-cooled Chassis....................14
13.1.7 Auto-Standby..........................................14
13.2 Features..........................................................14
13.2.1 Switching Power Supply ........................14
13.2.2 Power Mode............................................14
13.2.3 Adaptive Voltage Rail ..............................14
13.2.4 DriveCore Power Stage ...........................14
Important Safety Instructions ......................................2
Declaration of Conformity ...........................................3
1 Welcome .........................................5
1.1 Features ...........................................................5
2 How to Use This Manual ........................5
3 Features...........................................5
4 Setup ..............................................6
4.1 Unpack Your Amplifier ......................................6
4.2 Install Your Amplifier ........................................6
4.3 Ensure Proper Cooling .....................................6
4.4 Choose Input Wire and Connectors ..................7
4.5 Choose Output Wire and Connectors ...............7
4.6 Wire Your System .............................................8
4.7 Connect to AC Mains .......................................8
4.8 Startup Procedure ............................................9
5 Precautions ......................................9
6 Front Panel .......................................10
7 Back Panel........................................11
8 Amp Configuration...............................12
8.1. 70Hz HPF (High Pass Filter).............................12
8.2 Limiter .............................................................12
9 Operating Modes.................................12
9.1 Normal..............................................................12
9.2 Green Power.....................................................12
9.3 Deep Sleep .......................................................12
14 Accessories .....................................14
14.1 XFMR 4/8 ..................................................14
14.2. Rack Support/Ears ....................................14
15 Troubleshooting ................................15
15.1 Power Indicator...............................................15
15.2 Fault Indicator.................................................15
15.3 Thermal Indicator............................................15
15.4 Clip Indicator..................................................15
15.5 Signal Indicator ..............................................15
15.6 Ready Indicator...............................................15
16 Specifications...................................16
17 AC Power Draw and Thermal Dissipation ...17
18 Service...........................................21
19 Warranty.........................................22
10 Auxiliary Ports .................................13
9.1 Deep Sleep .......................................................13
9.2 Amp Status.......................................................13
Product Registration Form...........................................25
Factory Service Information Form ...............................27
11 Input Routing ...................................13
13 Advanced Features ............................14
page 4
Operation Manual
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CT Power Amplifiers
3 Features
1 Welcome
Crown® ComTech DriveCore™ amplifiers provide state-of-the-art
technology for installed sound applications. The ComTech amplifiers
provide noiseless operation and small footprint with excellent quality and
performance.
2 How to Use This
Manual
•
4 channel or 8 channel (4 inputs with 4
outputs or 8 inputs with 8 outputs)
This manual provides you with the necessary
information to safely and correctly set up and
operate your amplifier. It does not cover every
aspect of installation, setup, or operation that
might occur under every condition. For additional
information, please consult Crown’s Amplifier
Application Guide (available online at www.
crownaudio.com), Crown Technical Support, your
system installer, or system retailer).
•
•
•
•
•
Single rack space
Balanced 3-pin Barrier block-type/line inputs
4-pin Phoenix-type speaker outputs
Flexible input routing
ComTech DriveCore amplifiers offer:
1.1 Features
Audiophile Sound
• A signal-to-noise ratio of better than 110dB
Multiple Power Configuration (Auto-Standby,
Deep Sleep, and Green Mode)
• Total harmonic distortion below 0.05% across the full audio bandwidth
• Greater than 70dB crosstalk
•
Auxiliary port for amp status and power
saving mode (Deep Sleep)
•
•
•
Circuit breaker protection with reset switch
Convection-cooled chassis (no fan)
• Frequency response of 0.5dB
Size Advantage
• Up to 8 channels in a single rack-space
Three-year, no-fault, fully transferable
warranty that completely protects your
investment and guarantees its specifications
• Weight of only 10 pounds (4.54 Kg)
•
Can be used in mass notification and EN 54
systems
Power Efficiency
• Over 90% efficient in the DriveCore amplifier stage
•
•
•
Patented technology including DriveCoreTM
• Power consumption of less than 1W when not in use (In Deep Sleep)
Fault Reporting through Aux Port
• Green Mode delivers power when needed. Amplifier efficency increases
by up to 10% when compared to typical class D amplifiers
Adaptive Rail Technology for power
on demand.
•
Complies with Green Edge by Harman
Typical applications for ComTech DriveCore amplifiers include boardrooms,
video and teleconferencing, VIP suites in stadiums and arenas, and upscale
restaurants and retail outlets.
Operation Manual
page 5
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CT Power Amplifiers
4 Setup
4.1 UnpackYour Amplifier
4.2 InstallYour Amplifier
4.3 Ensure Proper Cooling
Please unpack and inspect your amplifier for
any damage that may have occurred during
transit. If damage is found, notify the
transportation company immediately. Only you
can initiate a claim for shipping damage. Crown
will be happy to help as needed. Save the
shipping carton as evidence of damage for the
shipper’s inspection.
CAUTION: Before you begin, make sure
your amplifier is disconnected from the
power source and that all level controls
(see section 7.6) are set to 0.
When using an equipment rack, mount units
directly on top of each other. Close any open
spaces in the rack with blank panels. DO NOT
block front, top or side air vents.
The amplifier is 1.75” tall by 15.19” deep and
19” wide (see figure 4.2.1).
The side walls of the rack should be a minimum
of two inches (5.1 cm) away from the amplifier
sides, and the back of the rack should be a
minimum of four inches (10.2 cm) from the
amplifier back panel. While the amplifier is
convection cooled and does not require a fan, it
is critical that the air vents are not covered.
Mount the unit in a standard 19-inch (48.3-cm)
equipment rack (EIA RS-310B). You can also
place a single amp on a solid, stable surface or
stack multiple amps.
We also recommend that you save all packing
materials so you will have them if you ever need
to transport the unit. Never ship the unit
without the factory pack.
NOTE: When transporting, amplifiers should be
supported at both front and back.
YOU WILL NEED (not supplied):
•
•
•
Input wiring cables
Output wiring cables
Flathead screwdriver
Rack for mounting amplifier (or a stable surface
for stacking)
WARNING: Before you start to set up
your amplifier, make sure you read and
observe the Important Safety Instruc-
tions found at the beginning of this
manual.
Figure 4.2.1 CT Series Dimensions
page 6
Operation Manual
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CT Power Amplifiers
4 Setup
4.4 Choose InputWire
and Connectors
4.5 Choose OutputWire and
Connectors
Crown recommends using pre-built or
professionally wired balanced line (two-
conductor plus shield). Balanced wiring provides
better rejection of unwanted noise and hum but
unbalanced line may also be used. For more
information, refer to the Crown Amplifier
Application Guide, available online at www.
crownaudio.com.
Crown recommends using professionally
constructed, high quality, two-conductor, heavy
gauge speaker wire and connectors. Use 2-pin
Phoenix-type connectors (Included with the
amp).
Suggested below are guidelines to select the
appropriate size of wire based on the distance
from amplifier to speaker. Check with local code
as this may vary.
Use 3-pin Phoenix-type cable ends at the amp
input connectors.
Distance
Wire Size
16 AWG
Figure 4.4.1 shows connector pin assignments
for balanced wiring and figure 4.4.2 shows
connector pin assignments for unbalanced wiring.
up to 25 ft. (7.6m)
26-40 ft. (7.9-12.2m)
14 AWG
NOTE: Custom wiring should only be
performed by qualified personnel. Class 2
wiring is required.
CAUTION: Never use shielded cable for
output wiring.
CAUTION: Never connect the speaker
return to the chassis of the amplifier, or
damage to the amplifier may result.
CAUTION: Output of amplifier channels
cannot be bridged. This may damage the
amplifier.
Figure 4.4.1
Figure 4.4.2
Operation Manual
page 7
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CT Power Amplifiers
4 Setup
4.7 Connect to AC Mains
Connect your amplifier to the AC mains power source
(power outlet) with the supplied AC power cordset. First,
connect the IEC end of the cordset to the IEC connector
on the amplifier; then, plug the other end of the cord set
to the AC mains.
4.6 WireYour System
2. The input for a channel can be routed to the next
channel, overriding the wired input signal for that
channel. This method simplifies input wiring and
minimizes use of y-cables.
Before you wire your system, you must be familiar with
the capabilities of the input routing.
The DriveCore amplifier can be configured in two ways:
1. The input for a channel goes out the same channel.
This option is the standard configuration.
WARNING: The third prong of this connector
(ground) is an important safety feature. Do not
attempt to disable this ground connection by
using an adapter or other methods.
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
Amplifiers don’t create energy. The AC mains voltage and
current must be sufficient to deliver the power you
expect. If the AC line voltage varies out of an acceptable
range, the amplifier’s power supply turns off and the blue
Power LED flashes. The amplifier will turn back on when
the AC line voltage returns to safe operating levels.
Figure 4.6.3 Two channel to four channel routing
Figure 4.6.1 Four channels with no input routing
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
Figure 4.7.1 provides voltage limits for all amplifier AC
voltage configurations. Also, the amplifier must be run
within the specified mains frequency requirements
(indicated on the amplifier’s back panel label). If you are
unsure of the output voltage of your AC mains, please
consult your electrician.
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
CHANNEL 8
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
CHANNEL 8
Figure 4.6.4 One channel to four channel routing
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
CHANNEL 8
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
CHANNEL 8
Model
Under-Voltage Limit
Over-Voltage Limit
All Models
90 VAC
264 VAC
Figure 4.7.1 AC Under-Voltage and Over-Voltage Limits for
Various Amplifier Models
Figure 4.6.2 Eight channels with no input routing
Figure 4.6.5 Four channel to eight channel routing
Input routing is configured using the dip switches on the
back of the amplifier. See Section 11 Input Routing
for information on configuring switches.
Note: ComTech DriveCore amplifiers can NOT be
bridged.
page 8
Operation Manual
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CT Power Amplifiers
4 Setup
5 Precautions
Your amplifier is protected from internal and external
faults, but you should still take the following
4.8 Startup Procedure
precautions for optimum performance and safety:
Use the following procedure when first turning on your
amplifier:
1. Before use, your amplifier first must be configured
for proper operation, including input and output
wiring hookup. Improper wiring can result in
serious operating difficulties. For information on
wiring and configuration, please consult the Setup
section of this manual or, for advanced setup
techniques, consult Crown’s Amplifier Application
1. Turn down the level of your audio source.
2. Turn down the level controls of the amplifier (see
Section 7.6).
3. Turn on the “Power” switch. The Power indicator
should glow.
4. Turn up the level of your audio source to an
optimum level.
2. Use care when making connections, selecting
signal sources and controlling the output level.
The load you save may be your own!
5. Turn up the Level controls on the amplifier until the
desired loudness or power level is achieved.
3. Do not short the ground lead of an output cable to
the input signal ground. This may form a ground
loop and cause oscillations.
If you ever need to make any wiring or installation
changes, don’t forget to turn off the amplifier and
disconnect the power cord.
4. Never connect the output to a power
supply, battery or power main. Electrical
shock may result.
For help with determining your system’s optimum gain
structure (signal levels) please refer to the Crown
Amplifier Application Guide, available online at
5. Tampering with the circuitry, or making
unauthorized circuit changes may be hazardous
and invalidates all agency listings.
6. Do not operate the amplifier with the red Clip LEDs
constantly flashing.
7. Do not overdrive the mixer, which will cause
clipped signal to be sent to the amplifier. Such
signals will be reproduced with extreme accuracy,
and loudspeaker damage may result.
8. Do not operate the amplifier with less than the
rated load impedance. Due to the amplifier’s
output protection, such a configuration may result
in premature clipping and speaker damage.
9. Output of amplifier cannot be bridged or multiple
channels cannot be connected together.
Remember: Crown is not liable for damage that results
from overdriving other system components.
Operation Manual
page 9
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CT Power Amplifiers
6 Front Panel
1 2
5 4 3 9
6 7 8
1. Fault Indicator
• Red LED
3. Clip Indicator
5. Ready Indicator
7. Data Indicator
• Red LED
• One per output channel
• Green LED
• One per input channel
• Yellow LED (not functional in analog version)
• Indicates network activity
• One per output channel
• Flashes when the amplifier output channel has
stopped operating. Usually this means that the
amplifier must be serviced. (See Section 15
Troubleshooting)
• Illuminates when the channel is at the threshold
of audible distortion (See Section 15
Troubleshooting – reduce input level)
• When the limiter is turned on the Clip Indicator
will illuminate when the limiter is protecting the
amplifier from input overload.
• Illuminates when the channel is ready for signal
• Illuminates when the channel is initialized and
ready to produce audio output.
• Ready indicator will flash when the channel
is in standby.
• Ready Indictor will not illuminate or flash when
the amplifier is in deep sleep.
• Reserved for future releases (Lite and DSP)
8. Power Button
• On/off push button
9. Cooling Vent
2. Thermal Indicator
• Red LED
• Allows for air flow and cooling of the amplifier
4. Signal Indicator
• Green LED
• One per output channel
• If exceeds Thermal Limits, output channels will
shut down in pairs until thermal levels are within
tolerant ranges.
• Illuminates when the channel approaches
temperature constraints or is about to shut
down. Audible distortion may be heard.
• Unit stops amplification for each channel until
temperature returns to acceptable level. Once
the amp cools off enough, led turns off, audio
starts again.
6. Power Indicator
• One per input channel
• Illuminates when the input signal exceeds
-24dBu
• Blue LED
• Indicates AC power has been applied and is
within the safe operating range of the power
supply. The LED will flash when the AC line
voltage is above or below the nominal rated
value. The LED will also flash when the
amplifier is in Deep Sleep mode AND the power
button has been pushed.
page 10
Operation Manual
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CT Power Amplifiers
7 Back Panel
1
2 3
4
5
6
5
6
7
1. AC Power Inlet
4. Amp Configuration DIP Switches (see Amp
5. Amp Input Connectors
Status/Configuration in section 10.2)
• Switches 1-5 turn specific settings on and off:
• Standard IEC type 320 inlet for detachable
connector
• 100-240V
• 3-pin block connector can be used per input
• High impedance balanced
-70 Hz HPF (High Pass Filter
6. Channel Level Controls
- see Section 8.1)
2. Reset Button/Breaker
• One 21-position detented rotary attenuator per
channel
• Attenuation range from -100dB to 0dB
-Auto-Standby
-Amp Status
-Green Power (See Section 9.2)
-Limiter
• Push button switch
• Resets the circuit breaker that protects the power
supply
• A circuit breaker located near the IEC power inlet
protects the amplifier from excessive AC current
draw.
7. Output Speaker Connector
• Switches 6-12 sends input channel audio signal
to corresponding output channel and adjacent
output channel. In four channel model, switch
6-9 are non-functional, (see section 11)
• 4-pin Barrier block type per two channels
(2-Pin or 8-Pin Phoenix can be used)
3. Auxiliary Connector
• 3-pin Phoenix type connector
• Allows for amp to be placed in DEEP SLEEP
mode and monitoring of AMP STATUS
(see Section 10.2)
Operation Manual
page 11
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CT Power Amplifiers
8 Amp Configuration
9 Operating Modes
8.1 70Hz HPF (High Pass Filter)
DriveCore Amplifiers can work in a variety of
power modes.
Is green mode
DIP switch on?
Full Power
On the back panel, one 2-position high-pass filter
switch will only allow signals above 70Hz to be
amplified. This is to prevent transformer saturation.
The HPF, when turned on, is activated for all channels.
The filter is a 2nd order 12 dB/occ t filter.
9.1 Normal
The amplifier automaticaly operates full output power.
9.2 Green Power
Lower voltage rails
8.2 Limiter
Green mode utilizes Crown’s adaptive rail technology
for higher efficiency or power on demand. When Amp
Configuration DIP switch #4 is set to on, the amplifier
will operate in green mode.
Is there a clip
event?
The limiter reduces amplifier gain to allow over drive
without harsh clipping at output.
Minimum Power
When Amp Configuration Switch #5 is set to on
(pushed up), the amplifier will utilize the limiter feature.
For low input signal levels (less than –40dBu) the
amplifier will operate with minimum power.
Increase rails to Full Power
The amplifier will increase to full power if either of the
following occurs:
Figure 9.2.1 How Green Power DIP switches work
1 - The input signal goes above -40dBu
2 - There is a single clip event from any of the channels
Likewise, if the amplifier is operating with full power,
the amplifier will decrease the operating rails to
minimum power if the input signal drops
below -40dBu.
Through the use of Green Power, the efficiency of the
amplifier dramatically increases for lower audio signal
reproduction. The adaptive rail technology used in the
CT amplifiers can increase the efficiency of the
amplifier by up to 10% with low signal levels.
9.3 Deep Sleep
See Section 10.1
page 12
Operation Manual
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CT Power Amplifiers
10 Auxiliary Port
11 Input Routing
10.1 Deep Sleep
This amplifier can route a single channel to the next
numbered channel.
In deep sleep mode, the amp consumes less than 1
watt of power. It is activated via the AUX port with a
ground closure.
In CT 475 and CT 4150, DIP switches 6-9 are
non-functional.
To bring the amplifier out of deep sleep, remove the
ground closure via the AUX port.
When a DIP switch is set to “on” for a specific channel,
it sends the signal to its own output AND becomes the
input for the next numbered channel, overriding the
wired input for that channel.
10.2 Amp Status
The Amplifier Status is designed to work with life
safety or supervisory monitoring and control systems,
where notification of an amplifier fault is necessary.
The Amplifier Status is producing a signal
(Heartbeat or tone) when the amplifier is operating
within standard working parameters. If the amplifier
enters a fault or thermal condition, the Amplifier
Status signal will terminate. This feature in the
ComTech amplifier is always on. The Amplifier
Status is located on the Auxiliary Port, opposite the
DEEP SLEEP function. The configuration of the Amp
Status signal is possible through DIP Switch #3:
• ON – the microcontroller will send a 1 Hz
pulse to the “AMP STATUS” AUX port line
Figure 11.1
Figure 11.3
Channel 1 intput sent to all channel
outputs, overriding channel inputs for
channels 2,3, and 4
Channel 1 input sent to channels 1, 2, and 3
Channel 4 input sent to channels 4, 5, and 6
Channel 7 input sent to channels 7 and 8
• OFF – the microcontroller will send a logic
high level to the “AMP STATUS” AUX port line
The voltage output of the AuxPort is 5VDC at 50
milliamps. This TTL or similar signal can then be
connected to an interface to indicate the status to a
supervisory control system.
Amp status can be used in a variety of life safety
applications, such as EN54, IEC60849 among others.
Figure 11.2
Four input signals sent to four outputs
Operation Manual
page 13
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CT Power Amplifiers
13 Advanced Features
14 Accessories
14.1 XFMR 4/8
13.1 Protection Systems
13.1.7 Auto-Standby
The ComTech DriveCore amplifier is only capable of
low Z applications. It is necessary to use an outboard
transformer for Hi-Z applications. Crown highly
recommends the use of the XFMR 4/8 transformer box.
This transformer box is designed to mate with the top
of the ComTech DriveCore Amplifiers. See XFMR data
sheet for wiring diagram.
Your Crown amplifier provides extensive protection
and diagnostic capabilities, including thermal level
control, fault indicators, high-pass filtering, DC
protect, AC under/over voltage protection, inrush
limiting, and a convection-cooled chassis.
If amplifier does not see input signals for a period of 30
minutes, the amplifier will go into standby mode. The
amplifier will come out of standby mode once an input
signal is present. This feature is activated via DIP switch
#2 on the back of the amplifier. The amplifier will be
configured with Auto-Standby turn-on from the factory.
When the amplifier is in Standby, the Ready Indicator on
the front panel Display will flash.
13.1.1Thermal Indicator
If the amplifier becomes too hot for safe operation, the
channel that is generating too much heat will be shut
down until the temperature is reduced.
14.2 Rack Support Ears
The ComTech DriveCore amplifier requires front and
back rack support for proper mounting. These have
been provided with the amplifier.
13.2 Features
13.2.1 Switching Power Supply
13.1.2 Fault
Crown’s Switching Power Supply minimizes the
amplifier’s weight. Typical non-switching power
supplies require large, heavy transformers in order to
produce the required power at the output stage. These
transformers must be large to operate at 50 to 60 Hz
(standard AC supplied by the power company).
The amplifier will enter a Fault state if the amplifier
senses an unsafe condition. This protection is for both
internal and external faults. It is critical to check all
wiring to and from the amplifier to ensure the fault is
not caused by external conditions. Once wiring has
been verified to be correct, and the fault condition
persists, see Section 17 Service for Servicing
information.
By contrast, switching power supplies can operate with a
much smaller (and lighter) transformer because they first
convert the AC up to a much higher frequency, thereby
reducing waste. The power supply is voltage-specific,
allowing use in regions using 100V or 240V.
13.1.3 High-Pass Filters
HPF’s are traditionally used in Hi-Z applications. The
Com-Tech DriveCore is a low Z amplifier but can be
used in conjunction with the XFMR 4/8 transformer
box for Hi-Z applications. If the amplifier is to be used
in a Hi-Z application, then it is very important to use
the HPF to prevent transformer saturation.
13.2.2 Power Mode
Deep sleep and green mode allow the amplifier to operate
at all times with the lowest possible power level.
13.2.3 Adaptive RailTechnology (ART)
13.1.4 AC Under/OverVoltage
Protection
Crown has developed a voltage rail technology that
delivers power on demand. ART is at the center of CT
DriveCore’s Green mode that provides up to an additional
10% of efficiency. Through ART, the CT DriveCore is
always operating at maximum efficiency.
If the AC line voltage drops below 25% or rises above
15% of the nominal operating voltage of the amplifier,
the amplifier’s power supply turns off and the blue
Power LED flashes. The amplifier will turn back on
when the AC line voltage returns to safe operating
levels (within 10%).
13.2.4 DriveCore Power Stage
Crown has worked with Texas Instruments to develop an
audio amplifier on a micro-chip. The result is DriveCore
chipset that introduces audiophile quality for an
installation amp:
13.1.5 Circuit Breaker
A circuit breaker located near the IEC power inlet
protects the amplifier from excessive AC current draw.
-Greater than 90% Efficiency
-118dB Signal to Noise
-THD less than .05% in midband
frequencies
13.1.6 Convection-cooled Chassis
The DriveCore amplifiers require no fans for cooling,
providing quiet operation and optimum efficiency.
page 14
Operation Manual
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CT Power Amplifiers
FLASHING
15 Troubleshooting
CONDITION: Thermal indicator is flashing
15.1 Power Indicator
POSSIBLE REASON
OFF
• Amplifier has become too hot to operate. Allow amplifier
to cool. Amplifier will not pass audio if amplifier has
become too hot
CONDITION: Power indicator is OFF.
POSSIBLE REASON
• The amplifier has lost AC power.
• The amplifier’s Power switch is off.
15.4 Clip Indicator
• The amplifier is not plugged into the power receptacle.
ON or FLASHING
• The amplifier output level is so high that the power supply
circuit breaker has tripped. Allow the unit to cool. Turn
down the Level controls. Press the Reset Switch on the
back panel.
CONDITION: Clip indicator is ON or FLASHING.
POSSIBLE REASON
• input level or output level is distorting
FLASHING
CONDITION: Power indicator is FLASHING.
15.5 Signal Indicator
POSSIBLE REASON
OFF
• The AC line voltage has dropped below +15/-25 or has
risen above +15/-25% of the nominal line voltage of the
power supply.
CONDITION: Signal indicator is flashing even
though audio is applied, and the channel is
ready.
• Amp is in Deep Sleep Mode.
POSSIBLE REASON
• Input signal level is very low
• Level controls are turned down
15.2 Fault Indicator
FLASHING
CONDITION: Fault indicator is FLASHING.
15.6 Ready Indicator
POSSIBLE REASON
OFF
• The amplifier channel has stopped operating. Refer the
unit to an authorized Crown Service Center.
• Check for shorted outputs
CONDITION: Ready indicator is OFF.
POSSIBLE REASON
• Amplifier may be in deep sleep
15.3Thermal Indicator
ON
FLASHING
CONDITION:Thermal indicator is ON.
POSSIBLE REASON
CONDITION: Ready Indicator flashing
• The amplifier is becoming too hot for safe operation.
Allow amplifier to cool. Check for loads less than 4 ohms,
and for excessive input levels. Check for proper
ventilation and proper mode-switch setting.
POSSIBLE REASON
• Amplifier is in Standby mode. Flashing will stop once
there is an input signal.
Operation Manual
page 15
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CT Power Amplifiers
16 Specifications
Performance
CT475
CT4150
CT875
CT8150
Channels
4
4
8
8
Sensitivity
1.4V*
1.4V*
1.4V*
1.4V*
75W per channel
into 8/4 ohms
125W per channel
into 8/4 ohms
75W per channel
into 8/4 ohms
125W per channel
into 8/4 ohms
Rated Power Output
Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted)
110 dB
< 0.05%
< 0.05%
0.5 dB
110 dB
< 0.05%
< 0.05%
0.5 dB
110 dB
< 0.05%
< 0.05%
0.5 dB
110 dB
< 0.05%
Total Harmonic Distortion (THD) (full rated power, 1kHz)
Intermodulation Distortion (from 0dB down to -30dB)
Frequency Response (at 1W into 4/8 ohms)
Common Mode Rejection (20Hz to 1kHz)
Load Ranges
< 0.05%
0.5 dB
> 70 dB
> 70 dB
> 70 dB
> 70 dB
4-160 Ohms
4-160 Ohms
4-160 Ohms
4-160 Ohms
General
CT475
CT4150
CT875
CT8150
Dimension (H x W x D)
Net Weight
1.75” x 19” x 15.19”
10 lbs
1.75” x 19” x 15.19”
10 lbs
1.75” x 19” x 15.19”
10 lbs
1.75” x 19” x 15.19”
10 lbs
Net Shipping Weight
15 lbs
15 lbs
15 lbs
15 lbs
*26dBgain
**Amplifier is stable for 20hm loads
page 16
Operation Manual
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CT Power Amplifiers
17 AC Power Draw and Thermal Dissipation
AC Power Draw andThermal Disspation:
Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120/240 VAC mains.
Data based on all channels driven at 8 Ohms.
ComTech DriveCore 475
120VAC
240VAC
Watts Out
Thermal Dispation
Watts
out
Watts
Dissipated
Watts
Dissipated
Watts Out
Per 1A Line
Current
Load Watts in
Watts in Watts out
Line
Current
Line
Per 1A Line
Current
btu/hr
kcal/hr
Current
Idle (Deep Sleep)
Idle (Auto Standby)
Idle (Awake)
-
0.9
11
<0.1
0.30
0.40
0.25
1.25
1.33
1.35
2.65
2.70
2.75
1.22
1.23
1.27
2.52
2.56
2.64
1.00
11.00
15.00
-
0.90
10.00
13.20
9
1
15.8
25
-
3.41
53.88
85.25
-
0.86
13.57
21.48
-
-
0.22
0.25
0.20
0.80
0.84
0.90
1.60
1.70
1.80
0.73
0.74
0.76
1.50
1.52
1.58
-
15
Idle (Green Power)
-
9.7
64
8
6
4
8
6
4
8
6
4
8
6
4
38
38
30
28
28
38
37
36
31
30
30
40
39
38
27
62
64
38
38
47
45
42
63
59
56
51
51
49
67
66
63
25
27
29
40
45
49
23
24
26
36
38
44
90.37
92.07
110.83
143.22
160.27
170.50
83.27
85.59
92.41
130.26
138.62
155.84
22.76
23.19
27.92
36.08
40.37
42.95
20.98
21.56
23.28
32.81
34.92
39.26
1/8th Power Pink
Noise
65
27
70
38
33
66
38
142
147
150
62
100
100
100
38
42
140
145
149
60
100
100
100
38
1/3rd Power Pink
Noise
47
50
24
1/8th Power Sine
1/3rd Power Sine
63
38
25
61
38
65
38
27
63
38
138
141
146
100
100
100
38
136
138
144
100
100
100
41
46
Operation Manual
page 17
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CT Power Amplifiers
17 AC Power Draw and Thermal Dissipation
AC Power Draw andThermal Disspation:
Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120/240 VAC mains.
Data based on all channels driven at 8 Ohms.
ComTech DriveCore 4150
120VAC
240VAC
Watts Out
Thermal Dispation
Watts
out
Watts
Dissipated
Watts
Dissipated
Watts Out
Per 1A Line
Current
Load Watts in
Watts in Watts out
Line
Current
Line
Per 1A Line
Current
btu/hr
kcal/hr
Current
Idle (Deep Sleep)
Idle (Auto Standby)
Idle (Awake)
-
0.9
11.9
17.5
9.7
<0.1
0.35
0.60
0.25
1.90
2.10
2.20
3.95
4.00
4.15
1.80
1.82
1.89
3.89
3.98
4.12
1.00
11.90
17.50
-
0.90
10.90
16.50
9
<0.1
0.28
0.37
0.20
1.20
1.25
1.32
2.45
2.55
2.60
1.08
1.09
1.13
2.34
2.37
2.48
1
15.8
25
-
3.41
0.86
13.57
21.48
-
-
53.88
-
85.25
Idle (Green Power
-
-
8
6
4
8
6
4
8
6
4
8
6
4
98
63
63
33
30
28
42
42
40
35
34
33
43
42
40
36
96
120
105
230
244
248
94
63
63
53
50
48
68
65
64
58
57
55
71
70
67
33
39
42
63
77
81
31
33
37
54
58
68
121.06
134.70
179.03
214.83
262.57
276.21
109.12
114.24
127.88
188.23
205.96
238.02
30.49
33.93
45.10
54.12
66.14
69.58
27.49
28.78
32.21
47.42
51.88
59.96
1/8th Power Pink
Noise
102
115
225
230
240
95
40
63
53
63
167
167
167
63
58
167
167
167
63
1/3rd Power Pink
Noise
63
73
32
1/8th Power Sine
1/3rd Power Sine
96
63
34
95
63
100
222
227
237
63
38
99
63
167
167
167
55
221
225
235
167
167
167
60
70
page 18
Operation Manual
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CT Power Amplifiers
17 AC Power Draw and Thermal Dissipation
AC Power Draw andThermal Disspation:
Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120/240 VAC mains.
Data based on all channels driven at 8 Ohms.
ComTech DriveCore 875
120VAC
240VAC
Watts Out
Thermal Dispation
Watts
out
Watts
Dissipated
Watts
Dissipated
Watts Out
Per 1A Line
Current
Load Watts in
Watts in Watts out
Line
Current
Line
Per 1A Line
Current
btu/hr
kcal/hr
Current
Idle (Deep Sleep)
Idle (Auto Standby)
Idle (Awake)
-
0.9
17
<0.1
0.40
0.50
0.40
2.40
2.50
2.60
4.66
4.90
5.30
2.11
2.14
2.20
4.60
4.66
4.82
1.00
17.00
23.00
-
0.90
15.50
21.00
14
<0.1
0.25
0.32
0.30
1.32
1.40
1.60
2.85
2.90
3.00
1.27
1.28
1.32
2.77
2.80
2.90
1
15.8
25
-
3.41
0.86
14.60
21.48
-
-
57.97
-
23
85.25
Idle (Green Power)
-
14.5
117
121
126
277
284
292
115
116
119
269
273
283
-
8
6
4
8
6
4
8
6
4
8
6
4
75
75
31
30
29
43
41
38
35
35
34
43
43
42
42
114
117
122
270
275
283
113
114
118
266
269
279
75
75
57
54
47
70
69
67
59
58
57
72
71
69
39
42
47
70
75
83
38
39
43
66
69
79
143.22
156.86
173.91
262.57
286.44
313.72
136.40
139.81
150.04
236.31
248.93
285.08
36.08
39.51
43.81
66.14
72.16
79.03
34.36
35.22
37.80
59.53
62.71
71.81
1/8th Power Pink
Noise
46
75
51
75
200
200
200
75
77
200
200
200
75
1/3rd Power Pink
Noise
84
92
40
1/8th Power Sine
1/3rd Power Sine
75
41
75
75
44
75
200
200
200
69
200
200
200
73
84
Operation Manual
page 19
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CT Power Amplifiers
17 AC Power Draw and Thermal Dissipation
AC Power Draw andThermal Disspation:
Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120/240 VAC mains.
Data based on all channels driven at 8 Ohms.
ComTech DriveCore 8150
120VAC
240VAC
Watts Out
Thermal Dispation
Watts
out
Watts
Dissipated
Watts
Dissipated
Watts Out
Per 1A Line
Current
Load Watts in
Watts in Watts out
Line
Current
Line
Per 1A Line
Current
btu/hr
kcal/hr
Current
Idle (Deep Sleep)
Idle (Auto Standby)
Idle (Awake)
-
0.9
17
<0.1
0.35
0.60
0.40
3.40
4.00
3.50
7.60
6.50
5.70
3.37
4.00
3.74
7.85
9.93
8.79
1.00
17.00
26.50
-
1.00
15.80
25.00
14
<0.1
0.28
0.37
0.30
2.10
2.10
2.10
4.30
4.50
4.40
1.93
2.33
2.12
4.36
5.56
4.93
1
15.8
25
3.41
0.86
14.60
22.76
-
-
57.97
-
26.5
14.5
179
221
207
438
550
525
183
221
205
452
570
507
90.37
Idle (Green Power)
-
-
-
8
6
4
8
6
4
8
6
4
8
6
4
122
155
131
325
400
349
125
152
133
334
413
349
36
39
37
43
62
61
37
38
36
43
42
40
57
185
210
201
445
525
510
180
221
198
436
558
495
125
150
125
330
321
309
125
155
131
329
413
350
60
71
60
77
71
70
65
67
62
75
74
71
60
204.60
225.06
259.16
392.15
695.64
685.41
197.78
232.90
245.52
402.38
535.37
538.78
51.54
56.69
65.28
98.79
175.24
172.66
49.82
58.67
61.85
101.36
134.86
135.72
1/8th Power Pink
Noise
66
60
76
76
113
150
176
58
115
204
201
55
1/3rd Power Pink
Noise
1/8th Power Sine
1/3rd Power Sine
68
66
72
67
118
157
158
107
145
145
page 20
Operation Manual
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CT Power Amplifiers
18 Service
Crown amplifiers are quality units that rarely require
servicing. Before returning your unit for service, please
contact Crown Technical Support to verify the need for
servicing.
Remember to transport the unit in the original factory
pack. A list of authorized service centers in your area can
be obtained from Crown Factory Service, or online from
4. Use a bold black marker and write the SRA number
on three sides of the box.
1. Open carton and lift center cushion leaving both
end-cushions in place.
5. Record the SRA number for future reference. The
SRA number can be used to check the repair status.
2. Carefully place your product with the product’s front
panel facing the same direction as arrows indicate.
This unit has very sophisticated circuitry which should
only be serviced by a fully trained technician. This is one
reason why each unit bears the following label:
17.2.2 Factory Service
3. Reset center cushion down over top of product’s
chassis. The foam-in-place packing was molded to
accommodate different chassis depth sizes. If your
product’s chassis does not completely fill the
foam-in-place cavity, you may use a soft but solid
packing material (such as paper or bubble wrap)
behind the chassis.
17.2.4 Packing Instructions
Crown accepts no responsibility for non-serviceable
product that is sent to us for factory repair. It is the owner’s
responsibility to ensure that their product is serviceable
prior to sending it to the factory. Serviceable product list
is available at
For more information, please contact us direct.
Important: These instructions must be followed. If they
are not followed, Crown Audio, Inc. assumes no
responsibility for damaged goods and/or accessories that
are sent with your unit.
CAUTION: To prevent electric shock,
do not remove covers. No user serviceable
parts inside. Refer servicing to a qualified
technician.
1. Fill out and include the Crown Audio Factory Service
Information sheet in the back of this manual.
Complete the Crown Audio Factory Service Information
form, in the back of this manual, when returning a Crown
product to the factory or authorized service center. The
form must be included with your product inside the box or
in a packing slip envelope securely attached to the
outside of the shipping carton. Do not send this form
separately.
4. Enclose the completed Crown Audio Factory Service
Information form (or securely attach it to the outside
of carton) and re-seal the shipping pack with a sturdy
carton sealing tape.
A Service Return Authorization (SRA) is required for
product being sent to the factory for repair. An SRA can be
factserv.htm. If you do not have access to the web, please
call Crown’s Customer Service at 574.294.8200 or
800.342.6939 extension 8205.
2. Do not ship any accessories (manuals, cords,
hardware, etc.) with your unit. These items are not
needed to service your product. We will not be
responsibility for these items.
17.2.5 Estimate Approval
Approval of estimate must be given within 30 days after
being notified by Crown Audio Inc. Units still in the
possession of Crown after 30 days of the estimate will
become the property of Crown Audio Inc.
3. When shipping your Crown product, it is important
that it has adequate protection. We recommend you
use the original pack material when returning the
product for repair. If you do not have the original box,
please call Crown at 800.342.6939 or 574.294.8210
and order new pack material. See instructions for
“foam-in-place” shipping pack. (Do not ship your
unit in a wood or metal cabinet.)
Warranty is only valid within the country in which the
product is purchased.
For warranty service, we will pay for ground shipping
both ways in the United States. Contact Crown Customer
Service to obtain prepaid 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 reimbursement.
Your repaired unit will be returned via UPS ground.
Please contact us if other arrangements are required.
17.1 International and Canada Service
17.2.6 Payment of Non-Warranty Repairs
Service may be obtained from an authorized service
center. (Contact your local Crown/Amcron
Payment on out-of-waranty repairs must be received
within 30 days of the repair date. Units unclaimed after 30
days become the property of Crown Audio Inc.
representative or our office for a list of authorized
service centers.) To obtain service, simply present the
bill of sale as proof of purchase along with the defective
unit to an authorized service center. They will handle
the necessary paperwork and repair. Remember to
transport your unit in the original factory pack.
4. If you provide your own shipping pack, the minimum
recommended requirements for materials are as
follows:
17.2.3 Factory Service Shipping
Instructions:
If you have any questions, please contact Crown Factory
Service.
a. 275 P.S.I. burst test, Double-Wall carton that allows
for 2-inch solid Styrofoam on all six sides of unit or 3
inches of plastic bubble wrap on all six sides of unit.
1. Service Return Authorization (SRA) is required for
product being sent to the factory for service. Please
complete the SRA by going to
Crown Factory Service
1718 W. Mishawaka Rd.,
Elkhart, Indiana 46517 U.S.A.
17.2 US Service
do not have access to our website, call
1.800.342.6939, extension 8205 and we’ll create the
SRA for you.
Service may be obtained in one of two ways: from an
authorized service center or from the factory. You may
choose either. It is important that you have your copy of
the bill of sale as your proof of purchase.
b. Securely seal the package with an adequate carton
sealing tape.
Telephone:
574.294.8200
800.342.6939 (North America,
Puerto Rico, and Virgin Islands only)
c. Do not use light boxes or “peanuts”. Damage caused
by poor packaging will not be covered under
warranty.
2. See packing instructions that follow.
17.2.1 Service at a US Service Center
Facsimile:
574.294.8301 (Technical Support)
574.294.8124 (Factory Service)
3. Ship product to:
This method usually saves the most time and effort.
Simply present your bill of sale along with the defective
unit to an authorized service center to obtain service.
They will handle the necessary paperwork and repair.
Using your ‘foam-in-place’ shipping pack
CROWN AUDIO FACTORY SERVICE
1718 W MISHAWKA RD.
ELKHART, IN 46517
Note: The foam-in-place packing is molded so that there
is only one correct position for your product.
Internet:
Operation Manual
page 21
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CT Power Amplifiers
19 Warranty
18.1 UNITED STATES & CANADA
SUMMARY OFWARRANTY
the actual purchase price, not including interest,
insurance, closing costs, and other finance
charges less a reasonable depreciation on the
product from the date of original purchase.
Warranty work can only be performed at our
authorized service centers or at the factory.
Warranty work for some products can only be
performed at our factory. We will remedy the
defect and ship the product from the service center
or our factory within a reasonable time after
receipt of the defective product at our authorized
service center or our factory. All expenses in
remedying the defect, including surface shipping
costs in the United States, will be borne by us.
(You must bear the expense of shipping the
product between any foreign country and the port
of entry in the United States including the return
shipment, and all taxes, duties, and other customs
fees for such foreign shipments.)
THIS INCLUDES ANY DAMAGE TO ANOTHER
PRODUCT OR PRODUCTS RESULTING FROM
SUCH A DEFECT. SOME STATES DO NOT ALLOW
THE EXCLUSION OR LIMITATIONS OF
INCIDENTAL OR CONSEQUENTIAL DAMAGES,
SO THE ABOVE LIMITATION OR EXCLUSION
MAY NOT APPLY TO YOU.
Crown International, 1718 West Mishawaka Road,
Elkhart, Indiana 46517-4095 U.S.A. warrants to
you, the ORIGINAL PURCHASER and ANY
SUBSEQUENT OWNER of each NEW Crown
product, for a period of three (3) years from the
date of purchase by the original purchaser (the
“warranty period”) that the new Crown product is
free of defects in materials and workmanship. We
further warrant the new Crown product regardless
of the reason for failure, except as excluded in this
Warranty.
WARRANTY ALTERATIONS
No person has the authority to enlarge, amend, or
modify this Crown Warranty. This Crown Warranty
is not extended by the length of time which you are
deprived of the use of the new Crown product.
Repairs and replacement parts provided under the
terms of this Crown Warranty shall carry only the
unexpired portion of this Crown Warranty.
Warranty is only valid within the country in which
the product was purchased.
ITEMS EXCLUDED FROMTHIS
CROWNWARRANTY
DESIGN CHANGES
This Crown Warranty is in effect only for failure of
a new Crown product which occurred within the
Warranty Period. It does not cover any product
which has been damaged because of any
We reserve the right to change the design of any
product from time to time without notice and with
no obligation to make corresponding changes in
products previously manufactured.
HOWTO OBTAINWARRANTY
SERVICE
intentional misuse, accident, negligence, or loss
which is covered under any of your insurance
contracts. This Crown Warranty also does not
extend to the new Crown product if the serial
number has been defaced, altered, or removed.
You must notify us of your need for warranty
service within the warranty period. All
LEGAL REMEDIES OF PURCHASER
components must be shipped in a factory pack,
which, if needed, may be obtained from us free of
charge. Corrective action will be taken within a
reasonable time of the date of receipt of the
defective product by us or our authorized service
center. If the repairs made by us or our authorized
service center are not satisfactory, notify us or our
authorized service center immediately.
THIS CROWN WARRANTY GIVES YOU SPECIFIC
LEGAL RIGHTS, YOU MAY ALSO HAVE OTHER
RIGHTS WHICH VARY FROM STATE TO STATE.
No action to enforce this Crown Warranty shall be
commenced after expiration of the warranty
period.
WHATTHEWARRANTORWILL DO
We will remedy any defect, regardless of the
reason for failure (except as excluded), by repair,
replacement, or refund. We may not elect refund
unless you agree, or unless we are unable to
provide replacement, and repair is not practical or
cannot be timely made. If a refund is elected, then
you must make the defective or malfunctioning
product available to us free and clear of all liens or
other encumbrances. The refund will be equal to
THIS STATEMENT OF WARRANTY SUPERSEDES
ANY OTHERS CONTAINED IN THIS MANUAL FOR
DISCLAIMER OF CONSEQUENTIAL
AND INCIDENTAL DAMAGES
CROWN PRODUCTS.
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YOU ARE NOT ENTITLED TO RECOVER FROM US
ANY INCIDENTAL DAMAGES RESULTING FROM
ANY DEFECT IN THE NEW CROWN PRODUCT.
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CT Power Amplifiers
19 Warranty
18.2 WORLDWIDE EXCEPT USA & CANADA
SUMMARY OF WARRANTY
WHAT THE WARRANTOR WILL DO
DISCLAIMER OF CONSEQUENTIAL AND
INCIDENTAL DAMAGES
Crown International, 1718 West Mishawaka Road,
Elkhart, Indiana 46517-4095 U.S.A. warrants to
you, the ORIGINAL PURCHASER and ANY
SUBSEQUENT OWNER of each NEW Crown1
product, for a period of three (3) years from the
date of purchase by the original purchaser (the
“warranty period”) that the new Crown product is
free of defects in materials and workmanship, and
we further warrant the new Crown product
regardless of the reason for failure, except as
excluded in this Warranty.
We will remedy any defect, regardless of the
reason for failure (except as excluded), by repair,
replacement, or refund. We may not elect refund
unless you agree, or unless we are unable to
provide replacement, and repair is not practical or
cannot be timely made. If a refund is elected, then
you must make the defective or malfunctioning
product available to us free and clear of all liens or
other encumbrances. The refund will be equal to
the actual purchase price, not including interest,
insurance, closing costs, and other finance
charges less a reasonable depreciation on the
product from the date of original purchase.
Warranty work can only be performed at our
authorized service centers. We will remedy the
defect and ship the product from the service center
within a reasonable time after receipt of the
defective product at our authorized service center.
YOU ARE NOT ENTITLED TO RECOVER FROM US
ANY INCIDENTAL DAMAGES RESULTING FROM
ANY DEFECT IN THE NEW CROWN PRODUCT.
THIS INCLUDES ANY DAMAGE TO ANOTHER
PRODUCT OR PRODUCTS RESULTING FROM
SUCH A DEFECT.
WARRANTY ALTERATIONS
No person has the authority to enlarge, amend, or
modify this Crown Warranty. This Crown Warranty
is not extended by the length of time which you are
deprived of the use of the new Crown product.
Repairs and replacement parts provided under the
terms of this Crown Warranty shall carry only the
unexpired portion of this Crown Warranty.
Warranty is only valid within the country in which
the product is purchased.
1
Note: If your unit bears the name “Amcron,” please substitute it
for the name “Crown” in this warranty.
ITEMS EXCLUDED FROM THIS CROWN-
WARRANTY
DESIGN CHANGES
We reserve the right to change the design of any
product from time to time without notice and with
no obligation to make corresponding changes in
products previously manufactured.
This Crown Warranty is in effect only for failure of
a new Crown product which occurred within the
Warranty Period. It does not cover any product
which has been damaged because of any
intentional misuse, accident, negligence, or loss
which is covered under any of your insurance
contracts. This Crown Warranty also does not
extend to the new Crown product if the serial
number has been defaced, altered, or removed.
HOW TO OBTAIN WARRANTY SERVICE
You must notify your local Crown importer of your
need for warranty service within the warranty
period. All components must be shipped in the
original box. Corrective action will be taken within
a reasonable time of the date of receipt of the
defective product by our authorized service center.
If the repairs made by our authorized service
center are not satisfactory, notify our authorized
service center immediately.
LEGAL REMEDIES OF PURCHASER
No action to enforce this Crown Warranty shall be
commenced after expiration of the warranty period.
THIS STATEMENT OF WARRANTY SUPERSEDES
ANY OTHERS CONTAINED IN THIS MANUAL FOR
CROWN PRODUCTS.
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Operation Manual
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PRODUCT REGISTRATION
Crown Audio, Inc.
1718 W. Mishawaka Rd.
Elkhart, IN 46517-9439
Phone: 574-294-8000
Fax: 574-294-8329
Warranty is only valid within the country in which the product is purchased.
When this form is used to register your product, it may be mailed or faxed.
Crown Audio, Inc.
1718 W Mishawaka Rd
Elkhart IN 46517
Fax: 574-294-8329
Please note that some information is required. Incomplete registrations will not be processed. * Indicates required information.
OWNER’S INFORMATION - PLEASE PRINT
* First name: ______________________ Middle initial: _____ * Last name: ________________________________
Company: _________________________________________________________________________________
* Mailing address: ____________________________________________________________________________
* City: ____________________________* State: ___________________________* Zip Code: ________________
* Country: __________________________ E-mail address: ___________________________________________
* Phone # (include area code): ___________________________ Fax #: __________________________________
PRODUCT INFORMATION
* MODEL
e.g. IT8000, CDi1000, PCC160
* SERIAL #
e.g. 8000000000
* PURCHASE DATE
mo/day/yr
________________________________
________________________________
________________________________
________________________________
____________________
____________________
____________________
____________________
______ /_____ /_____
______ /_____ /_____
______ /_____ /_____
______ /_____ /_____
Product purchased from: *(Business/Individual) ___________________________ Country: ________________________
Comments: ____________________________________________________________________________________
_____________________________________________________________________________________________
_____________________________________________________________________________________________
Operation Manual
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CT Power Amplifiers
Crown Audio Factory Service Information
Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517
PLEASE PRINT CLEARLY
SRA #: __________________(If sending product to Crown factory service.)
Model: ____________________________________________
Serial Number: _____________________
Purchase Date: _____________
PRODUCT RETURN INFORMATION
Individual or Business Name: ____________________________________________________________________________________________________________________________________________________________
Phone #: __________________________________________________ Fax #: ________________________________________ E-Mail: _______________________________________________________
Street Address (please, no P.O. Boxes): _____________________________________________________________________________________________________________________________________________________
City: __________________________________________ State/Prov: ________________________________ Postal Code: _________________ Country: _________________________
Nature of problem: ___________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________
Other equipment in your system: _________________________________________________________________________________________________________________________________________________________
If warranty is expired, please provide method of payment. Proof of purchase may be required to validate warranty.
PAYMENT OPTIONS
I have open account payment terms. Purchase order required. PO#: __________________________________
COD
Credit Card (Information below is required; however if you do not want to provide this information at this time, we will contact you when your unit is repaired for the information.)
Credit card information:
Type of credit card:
MasterCard
Personal/Consumer
Visa
American Express
Discover
Type of credit card account:
Business/Corporate
Card # ______________________________________________ Exp. date: _____________ * Card ID #: __________________________
* Card ID # is located on the back of the card following the credit card #, in the signature area. On American Express, it may be located on the front of the card. This number is required to process the charge to your account. If you do not want to provide
it at this time, we will call you to obtain this number when the repair of your unit is complete.
Name on credit card:
____________________________________________________________________________
Billing address of credit card: __________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
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