™
PZ S 1 4 0
Mu l ti - Z o n e Mi xe r / A m p l i fi e r
®
ARCHITECTURAL ACOUSTICS®
OWNER’S MANUAL
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PZSª 140
Multi-Zone Mixer/Amplifier
DESCRIPTION:
The Peavey Architectural Acoustics PZSª 140 is a five-channel mixing system with assign-
ment capability to four independent powered zones. Each channel offers low and high equalization,
channel level control, and zone assignment switching. Channels one and two offer low-Z (XLR)
microphone inputs for paging capability, while channels three through five offer dual (paralleled)
RCA jacks for use with various music sources. All five channels also have detachable screw terminal
connectors with Low-Z mic inputs and High-Z inputs. Additionally, channels one and two have
recessed screwdriver controls for threshold and paging hold time. Each zone has a master level
control, signal presence and clipping LED indicators, and detachable connectors for preamp
out/power amp in. Each zone power amp is rated at 35 W RMS and provides a 4-ohm direct output
and transformer isolated 8-ohm, 25- and 70-volt outputs.
FEATURES:
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Five input channels
Four zones
35 watts output per zone
Two XLR low-Z mic inputs (balanced)
Detachable input connector for Low-Z mic and High-Z line on each channel
Signal LED indicator for each channel
Channel level control
Low and high active EQ for each channel
Four zone assignment switches for each channel
Front panel adjustable threshold and paging hold on channels 1 and 2
Four master output level controls with signal and clipping LED indicators
Detachable preamp output/power amp input connector for each zone
48 volts phantom power on all low-Z inputs
Each zone output provides a 4-ohms direct output and transformer isolated 8-ohms, 25- and
70-volt outputs
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Each zone has a 600-ohm line level balanced output
19" standard rack-mount package
Three rack spaces
Externally accessible mains fuse
3
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FRONT PANEL:
8
9
7
3
2
12
4
4
5
5
6
1
11
14
10
13
FRONT PANEL FEATURES:
1.
CHANNEL LEVEL CONTROLS
Controls the signal level being sent to the assigned zones from each channel.
2.
CHANNEL LOW EQ CONTROL (BASS)
Active shelving type equalization control that adjusts the channel low-frequency response.
Clockwise rotation boosts low frequencies while counter-clockwise rotation reduces low
frequencies.
3.
4.
CHANNEL HIGH EQ CONTROL (TREBLE)
Active shelving type equalization control that adjusts the channel high-frequency response.
Clockwise rotation boosts high frequencies while counter-clockwise rotation reduces high
frequencies.
CHANNEL 1 and 2 THRESHOLD CONTROL (SCREWDRIVER)
Controls the level of signal needed to trigger the ducking circuitry in channels 1 and 2. When
the ducking circuit is active, the music levels will be reduced by 20 dB to allow the page to be
heard. Turning the control clockwise increases the sensitivity of the ducking circuitry. Turning
the control completely counter-clockwise defeats the channelsÕ ducking capabilities.
NOTE: This control and the channel level control (1) are not related, i.e., the channel level
control does not effect the threshold level sensitivity. The threshold control should be set high
enough that normal speech into the microphone (paging) will trigger the ducking circuitry, but
not so high as to allow the normal room ambient noise level to trigger the ducking circuitry.
This usually takes some experimentation and will vary depending upon applications.
5.
6.
CHANNEL 1 and 2 HOLD CONTROL
Controls the amount of time the signal is held ducked after the page has been completed.
Clockwise rotation increases the hold time to a maximum of four seconds. Counter-clockwise
rotation decreases the hold time to a minimum of 0.5 seconds. The hold time should be set
long enough to prevent the ducked signal from returning to normal levels during a page.
SIGNAL PRESENCE LED
Green LED that indicates a signal is present in the channel. The signal is sampled directly
from the preamp (before the level control) and will illuminate even if the level control is turned
completely down. A signal level of -60 dBu or greater in the channel will illuminate this LED.
4
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7.
8.
CHANNEL 1 ZONE ASSIGNMENT SWITCHES
Switches used to route the signal to the desired zone.
OPERATION NOTE: Anytime channel one is assigned to a zone and a signal is present in
channel one all other channels assigned to that zone will be ducked by 20 dB. This enables
channel one to be used for emergency override signals. This function can be disabled by
turning the threshold control completely counter-clockwise.
CHANNEL 2 ZONE ASSIGNMENT SWITCHES
Switches used to route the signal to the desired zone.
OPERATION NOTE: Anytime channel two is assigned to a zone and a signal is present in
channel two, all other channels assigned to that zone will be ducked by 20 dB (except
channel one). This function can be disabled by turning the threshold control completely
counter-clockwise.
9.
CHANNEL 3 THRU 5 ZONE ASSIGNMENT SWITCHES
Switches used to route the background audio signal to the desired zone. Selecting a
particular zone button routes the audio source associated with that particular channel to the
desired zone. The zone assignment switches can be used to route the audio to one or more
zones if desired.
10.
MASTER ZONE LEVEL CONTROLS
Controls the signal level being sent to each zone amplifier. Normally these controls should be
set at the 12:00 position and the overall system levels set using the various channel level
controls. This setting yields the best compromise for system noise performance and signal
headroom.
11.
12.
ZONE ACTIVE LEDS
Indicates whenever any signal activity is occurring in that particular zone. These LEDs will
light whenever a signal level above 50 mW RMS occurs in the associated zone power amp.
These indicators are helpful for setting up the zone signal levels.
ZONE CLIP LEDS
Indicates clipping may be occurring in that particular zone. These LEDs will light whenever a
signal level of 35 W RMS occurs in the associated zone. If these LEDs occasionally, flash
only on peaks of the music or paging signal, audible clipping is probably not occurring. If
these LEDs come on and stay on, then the power amps are clipping and audible distortion is
probably occurring in that zone.
OPERATION NOTE: These LEDs are only an indication of the level being sent to the power
amps from the preamp. If a signal processor is used in the insert point, it must be set up in a
way that it does not add/reduce the system gain. If the signal processor changes the signal
level between the preamp and power amp the LEDs are no longer accurate.
13.
14.
POWER SWITCH
Rocker type switch, depress to ÒonÓ position to power unit.
POWER LED
Indicates when AC power is being supplied to the unit and the power switch is ÒonÓ.
5
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BACK PANEL:
20
15
16
17
18
21
22
19
25
26
25
26
24
23
BACK PANEL FEATURES:
15.
FUSE
The fuse is located within the cap of fuseholder. If the fuse should fail, IT MUST BE
REPLACED WITH ONE OF THE SAME TYPE AND VALUE IN ORDER TO AVOID DAMAGE
TO THE EQUIPMENT AND TO PREVENT VOIDING THE WARRANTY. If the amp repeatly
blows fuses, it should be taken to a qualified service for repair.
WARNING: THE FUSE SHOULD ONLY BE REPLACED WHEN THE POWER CORD HAS
BEEN DISCONNECTED FROM ITS POWER SOURCE.
16.
17.
AC LINE CORD SOCKET
Provided to accept the removable AC line cord. Connect only to proper sourceÑsee back
panel markings.
CHANNEL 1 and 2 XLR INPUTS
Normal low-Z mic inputs for cables fitted with a standard XLR male connector. The circuitry
associated with this input is electronically balanced and is designed to accept any normal low
impedance microphone. This receptacle is a standard three-pin XLR female wired as follows:
Pin 1- ground
Pin 2- positive input
Pin 3- negative input
OPERATION NOTE: 48 volt phantom power is always available on pins 2 and 3 with
reference to pin 1.
18.
CHANNEL 1 and 2 LOW-Z INPUT
Normal low-Z mic inputs for cables without connectors. Two conductor shielded cables
should be carefully wired as follows:
Cable shield- GND
Conductor 1- Low-Z positive
Conductor 2- Low-Z negative
Normally conductor 1 should be the positive microphone output feed. If the polarity of the
associated microphone is not known, one should be consistent in wiring all mics the same
way. Again the circuitry associated with this input is electronically balanced and is designed to
accept any normal low-impedance microphone.
6
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OPERATION NOTE: 48 volt phantom power is always available on the + and - pins with
reference to ground.
19.
CHANNEL 1 and 2 HI-Z INPUT
Normal high-Z line input for cables without connectors. This high-Z input can be used for
normal high impedance unbalanced microphones or other line level feeds. For a balanced
application, two conductor shielded cables should be wired as follows:
Cable shield- ground
Conductor 1- Hi-Z positive
Conductor 2- Hi-Z negative.
Notice the ground terminal is shared by the low-Z input as well. Normally, conductor 1 should
be the positive output feed from the associated equipment. For unbalanced applications such
as microphones with single conductor shielded cables and other such single ended equip-
ment feeds, jumper the Hi-Z negative input to ground, and wire the cable as follows:
Cable shield Ñ ground
Conductor Ñ Hi-Z positive.
20.
CHANNEL 3 THRU 5 RCA INPUTS
Normal high-Z line inputs for use with cables fitted with RCA male connectors. These inputs
are designed to accept normal line level unbalanced signals such as those from a tuner or
any other suitable background music source. The dual RCA inputs are mixed together inter-
nally to create a mono signal from a stereo feed. If only a mono signal is supplied, then either
RCA jack can be used. To create the correct gain structure for the RCA jacks, a new PZS 140
unit has jumpers from the Hi-Z negative input to ground on channels 3-5. If your unit does not
have such jumpers in place, and you intend to use the RCA jacks as inputs, it is suggested
that you add the jumper to that particular channel.
21.
CHANNEL 3 THRU 5 HI-Z INPUTS
Normal high-Z line input for cables without connectors. This high-Z input can be used for any
line level signal feed, balanced or unbalanced. A new unit has jumpers from the Hi-Z negative
input to ground on channels 3- 5. For unbalanced applications such as music sources with
single conductor shielded cables, the jumper should be left in place or added. Wire the cable
as follows:
Cable shield Ñ ground
Cable conductor Ñ Hi-Z positive.
For balanced signal feeds such as a transformer balanced telephone music feed, the ground
jumper should be removed and the two conductor shielded cable should be wired as follows:
Cable shield- ground
Conductor 1- Hi Ñ Z positive
Conductor 2- Hi Ñ Z negative.
22.
CHANNEL 3 THRU 5 LOW-Z INPUTS
Normal low-Z mic inputs for additional paging microphones as applications warrant. The
PZS 140 was primarily designed for two paging microphones and three music sources. If
desired, channels 3- 5 can be used for additional mic inputs, although these channels will
not duck the music levels as channels 1 and 2 do.
OPERATION NOTE: 48 volt phantom power is always available on the + and - pins with
reference to ground.
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23.
ZONE LOOP OUT/IN
A send/return patch point for external effects or EQ. The loop out terminals are line level
preamp outputs following the master level stages of each zone. The Loop In terminals are
line level power amplifier input points for each zone power amp. Both the Loop Out and
Loop In are unbalanced signals requiring only a single conductor shielded cable for patching
to the external device. Wire the cables as follows:
Cable shield- ground
Cable conductor-out (or in)
SEE DRAWINGS page 11.
Note: Both cables share the same ground terminal. The Loop Out has a low source imped-
ance to drive any reasonable device, and the in Loop In is a relatively high impedance input
to not load down any reasonable device. It is recommended that all such external effects or
EQ devices be in the same rack as the PZS.
24.
25.
LINK SWITCH
When the link switch is in the ÒinÓ position, the mixer preamp signal is routed directly to the
zone power amps. When the link switch is in the ÒoutÓ position the signal is routed to the Loop
Out. This signal can then be sent to an external processor or power amp. If it is sent to an
external processor, it can be returned to the Loop In connection to be amplified by the internal
zone amplifier.
600 OHM BALANCED OUTPUTS
A balanced output to drive additional power amplifiers. The PZS 140 has four 35 W RMS
power amplifiers built in. For small installations, this is an adequate power distribution system,
but for larger systems, external power amplifiers may be added to supply the extra power
required. In this case, the external power amplifiers can be driven from this 600 ohm
balanced line level output without causing unwanted ground loops or hum problems. A two-
conductor shielded cable should be wired as follows:
Cable shield- ground
Conductor 1- 600-ohm positive
Conductor 2- 600 ohm negative
In this case, conductor one should be wired to be the positive input feed for the external
power amp, and such amp connections can be wired either balanced or unbalanced.
SEE DRAWINGS page 12.
26.
POWER AMP OUTPUTS
Outputs for speaker connections. Each power amplifier has a 4-ohm direct output, and a tran-
former isolated 8-ohm, 25- and 70-volt outputs.
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PZSª 140 SPECIFICATIONS
POWER OUTPUT:
Line Inputs: 90 dB below rated power
(controls nominal,2k ½ terminated)
35 W RMS per channel @ less than 1%
(60 Hz to 20 kHz with all four channels
operating)
Mic Inputs: 82 dB below rated power
(controls nominal 150 ½
terminated)
OUTPUTS:
4 ½ (direct), 8 ½, 25 V and 70 V (isolated)
TONE CONTROLS:
Low EQ:
High EQ:
+10, -10 dB @ 100 Hz
+10, -10 dB @ 10 kHz
CHANNEL 1 and 2 INPUTS:
Mic:
Line:
2k ½, -54 dBu, (1.5 mV, balanced)
>50k ½, -18 dBu, (100 mV,
balanced)
CONTROLS:
Channels 1 and 2:
Level, low EQ, high EQ four assign switches,
signal presence, muting threshold and adjustable
release time.
Channels 3 thru 5:
Level, low EQ, high EQ, four assign switches
and signal presence
XLR Mic:
2k ½, -54 dBu (1.5 mV, balanced)
CHANNELS 3 thru 5 INPUTS:
Mic:
2k ½, -54 dBu, (1.5 mV,
unbalanced)
Line:
RCA:
>50k ½, -18 dBu (100 mV,
balanced)
>50k ½, -18 dBu, (100 mV,
unbalanced)
Masters 1 thru 4:
Level, signal presence and clipping LEDs
INSERTS:
Send:
POWER SUPPLY:
1k ½, 2.21 dBu, (1 volt,
unbalanced)
10k ½, 2.21 dBu, (1 volt
unbalanced)
Internal, 120 V AC @ 60 Hz
375 watts all channel at full power
175 watts all channel at 1/8 power
Five-amp fuse
Return:
FREQUENCY RESPONSE:
50 Hz to 20 kHz +0, -2 dB (transformer)
DIMENSIONS: (W x H x D)
19" x 6" x 15.25"
(48.3 cm x 13.3 cm x 38.7)
SIGNAL TO NOISE RATIO:
Residual:
90 dB below rated power
(channel down, master full up)
WEIGHT:
35.4 pounds (15.6 kg)
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PZSª-140 External Power Amp
and Effect Patches Output
Quarter Inch Plug
+ = tip
- = sleeve
= sleeve
PZSª140
PZSª140
PZSª140
XLR Input
Balanced or
Unbalanced
Pin 1 =
Pin 2 = +
Pin 3 = -
Switch
Out
Input
P
O
S
I
T
I
V
E
(
+
)
P
O
S
I
T
I
V
E
(
+
)
Output
CEQª280a
11
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LIMITED WARRANTY
Peavey Electronics Corporation warrants to the original purchaser of this new Architectural
Acoustics product that it is free from defects in material and workmanship. If within one (1) year from
date of purchase a properly installed product proves to be defective and Peavey is notified, Peavey
will repair or replace it at no charge. (Note: Batteries and patch cords not covered.) ÒOriginal
purchaserÓ means the customer for whom the product is originally installed.
Damage resulting from improper installation, interconnection of a unit or system of another
manufacturer, accident or unreasonable use, neglect or any other cause not arising from defects in
material and workmanship is not covered by this warranty. The warranty is valid only as to products
purchased and installed in the United States and Canada.
THIS LIMITED WARRANTY IS IN LIEU OF ANY AND ALL WARRANTIES, EXPRESSED
OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR USE. UNDER NO CIRCUMSTANCES WILL PEAVEY BE LIABLE FOR ANY
LOST PROFITS, LOST SAVINGS, INCIDENTAL DAMAGES OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT, EVEN IF PEAVEY HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THIS LIMITED WARRANTY IS
THE ONLY EXPRESSED WARRANTY ON THIS PRODUCT, AND NO OTHER STATEMENT,
REPRESENTATION, WARRANTY, OR AGREEMENT BY ANY PERSON SHALL BE VALID OR
BINDING UPON PEAVEY.
PeaveyÕs liability to the original purchaser for damages for any cause whatsoever and
regardless of the form of action is limited to the actual damages up to the greater of Five Hundred
Dollars ($500) or an amount equal to the purchase price of the product that caused the damage or
that is the subject of or is directly related to the cause of action. This limitation of liability will not
apply to claims for personal injury or damage to real property or tangible personal property allegedly
caused by PeaveyÕs negligence. For information on service under this warranty, call a Peavey
customer service representative at (601) 483-5376.
13
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Notes:
14
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IMPORTANT SAFETY INSTRUCTIONS
WARNING: When using electric products, basic cautions should always be followed, including the following:
1. Read all safety and operating instructions before using this product.
2. All safety and operating instructions should be retained for future reference.
3. Obey all cautions in the operating instructions and on the back of the unit.
4. All operating instructions should be followed.
5.
This product should not be used near water (i.e., a bathtub, sink, swimming pool, wet basement, etc.)
6. This product should be located so that its position does not interfere with its proper ventilation. It should not be placed flat against a wall
or placed in a built-in enclosure that will impede the flow of cooling air.
7. This product should not be placed near a source of heat such as a stove, radiator, or another heat producing amplifier.
8. Connect only to a power supply of the type marked on the unit adjacent to the power supply cord.
9. Never break off the ground pin on the power supply cord. For more information on grounding, write
for our free booklet ÒShock Hazard and Grounding."
10. Power supply cords should always be handled carefully. Never walk on or place equipment on power supply cords. Periodically check cords
for cuts or signs of stress, especially at the plug and the point where the cord exits the unit.
11. The power supply cord should be unplugged when the unit is to be unused for long periods of time.
12. If this product is to be mounted in an equipment rack, rear support should be provided.
13. Metal parts can be cleaned with a damp rag. The vinyl covering used on some units can be cleaned with a damp rag or an ammonia-based
household cleaner if necessary. Disconnect unit from power supply before cleaning.
14. Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation holes or any other openings.
15. This unit should be checked by a qualified service technician if:
a. The power supply cord or plug has been damaged.
b. Anything has fallen or been spilled into the unit.
c. The unit does not operate correctly.
d. The unit has been dropped or the enclosure damaged.
16. The user should not attempt to service this equipment. All service work should be done by a qualified service technician.
17. This product should be used only with a cart or stand that is recommended by Peavey Electronics.
18. Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably in susceptibility to noise induced
hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient time. The U.S. GovernmentÕs
Occupational Safety and Health Administration (OSHA) has specified the following permissible noise level exposures.
Duration Per Day In Hours
8
Sound Level dBA, Slow Response
90
92
6
4
3
95
97
2
1 1/2
1
1/2
1/4 or less
100
102
105
110
115
According to OSHA, any exposure in excess of the above permissible limits could result in some hearing loss. Ear plugs or protectors for the ear
canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss if exposure is in excess
of the limits as set forth above. To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all persons
exposed to equipment capable of producing high sound pressure levels such as this amplification system be protected by hearing protectors while
this unit is in operation.
SAVE THESE INSTRUCTIONS!
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ARCHITECTURAL ACOUSTICS¨
Features and specifications subject to change without notice.
A Division of Peavey Electronics Corporations
711 A Street / Meridian, MS 39301 / U.S.A. / (601) 486-1678
©1998
Printed in U.S.A. 7/98
80304445
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