Commercial Audio Series
180MA
Operation Manual
1160MA
280MA
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: Crown, Crown Audio and Amcron are registered trademarks of Crown International. Other trademarks are the
property of their respective owners.
Some models may be exported under the name Amcron.®
©2005 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8200
137783-6
2/05
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Commercial Audio Series Mixer-Amplifiers
Crown International, Inc.
DECLARATION of CONFORMITY
Issued By: Crown International, Inc.
1718 W. Mishawaka Road
Sue Whitfield
FOR COMPLIANCE QUESTIONS ONLY:
574-294-8289
Elkhart, Indiana 46517 U.S.A.
European Representative’s Name and Address:
Nick Owen
35, Bassets Field
Thornhill
Cardiff. South Glamorgen
CF14 9UG United Kingdom
Equipment Type: Commercial Audio Mixer-Amplifiers
Family Name: Mixer-Amplifiers
Model Names: 180MA, 280MA, 1160MA
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 61000-3-2:2001 Limits for Harmonic Current Emissions (equipment input current 16A per phase)
EN 61000-3-3:2002 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current 16A
EN 55022:2003 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 61000-4-2:2001 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)
EN 61000-4-3:2001 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, Criteria A)
EN 61000-4-4:2001 Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:2001 Surge Immunity (Criteria B)
EN 61000-4-6:2003 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: 2002 7th Ed. Safety Requirements - Audio Video and Similar Electronic Apparatus
CAN/CSA-E60065-03 7th Ed. Audio, Video and Similar Electronic Apparatus-Safety Requirements
UL 60065 7th Ed. Audio /Video and Musical Instrument Apparatus for Household, Commercial and Similar General Use.
I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.
Signed
Date of Issue: Nov. 1, 2004
Larry Coburn
Title: Senior Vice President of Manufacturing
Due to line current harmonics, we recommend that you contact your supply authority before connection.
Operation Manual
page 3
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Commercial Audio Series Mixer-Amplifiers
Table of Contents
Important Safety Instructions .......................................................2
Declaration of Conformity ............................................................3
1 Welcome ................................................................................5
1.1 Features ...........................................................................5
1.2 Front Panel Controls and Indicators ................................ 6
1.3 Back Panel Controls and Connectors................................7
2 Setup ......................................................................................8
2.1 Installation........................................................................8
2.2 How to Attach Rack Ears...................................................8
2.3 Choose Input Wire and Connectors .................................9
2.4 Choose Output Wire and Connectors ...............................9
2.5 Wire Your System ............................................................10
2.6 Input Routing....................................................................11
2.7 Phantom Power ................................................................11
2.8 Priority Muting .................................................................11
2.9 Link In/Out Switches.........................................................11
2.10 Remote Volume Control..................................................12
2.11 Four-Tone Generator.......................................................12
2.12 Powering Up...................................................................12
2.13 Included Accessories......................................................12
2.14 Optional Accessories......................................................12
2.15 Block Diagram................................................................13
3 Troubleshooting .................................................................. 14
4 Specifications ..................................................................... 15
5 Service ... .............................................................................. 16
5.1 Worldwide Service .......................................................... 16
5.2 US and Canada Service .................................................. 16
5.2.1 Service at a US or Canada Service Center ............. 16
5.2.2 Factory Service ...................................................... 16
5.2.3 Factory Service Shipping Instructions ................... 16
5.2.4 Packing Instructions .............................................. 16
5.2.5 Estimate Approval................................................... 16
5.2.6 Payment of Non-Warranty Repairs.......................... 16
6 Warranty .............................................................................. 17
Crown Factory Service Information Form .....................................19
page 4
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
*1 kHz
Power
180MA
Minimum guaranteed power
into 4 ohms or 70V/100V output
80W
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
1.1 Features
• Any input can be sent to any output
• Built-in four-tone generator
• Priority muting
1 Welcome
*1 kHz
Power
280MA
• 4 to 8 inputs, 1 to 2 amplifier output chan-
nels
The Crown® 180MA, 280MA and 1160MA are
high-value mixer-amplifiers for commercial
and industrial audio. They provide 4-ohm and
constant-voltage outputs (70V and 100V). The
mixer-amps are part of Crown’s Commercial
Audio Series, which also includes mixers and
power amplifiers. These low-cost units provide
all necessary features in a simple building-
block format.
Minimum guaranteed power
per channel into 4 ohms or
70V/100V output
• Ideal for commercial and industrial use
• Advanced protection system includes output
current limiting, DC protection, circuit breaker/
fuse, and thermal protection. Details available
80W
• Expandable by adding Crown Commercial
Audio mixers or Commercial Audio power
amplifiers (when available)
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
• Three-Year, No-Fault, Fully Transferable
Warranty completely protects your investment
and guarantees its specifications
• Balanced Phoenix-type mic/line inputs;
touch-proofed screw-terminal speaker outputs
• Independent Bass and Treble controls on
each input
*1 kHz
Power
1160MA
Minimum guaranteed power
into 4 ohms or 70V/100V output
160W
*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.
Operation Manual
page 5
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Commercial Audio Series Mixer-Amplifiers
1 Welcome
1.2 Front Panel Controls and Indicators
E. Clip Indicator
Red LED, one per output channel, illuminates at thresh-
old of audible distortion. Does not respond to signals
from the AMP INPUT connector.
A. Input Signal Presence Indicator
Green LED, one for each input channel, illuminates when
input signal exceeds –24 dBu (line) or –70 dBu (mic).
F. Power Indicator
B. Input Volume Controls
Microphone/line, four in 180MA and 1160MA, eight in
280MA. Detented potentiometers with knobs.
Blue LED indicates power on.
G, H. Tone Controls
Bass and Treble non-detented potentiometers on each
input channel. Bass 10 dB at 100 Hz, Treble 10 dB at
10 kHz.
C. Output Volume Controls
One per output channel. Detented potentiometer with
knob.
I. Power Switch
D. Output Signal Presence Indicator
Pushbutton on-off switch. The power switch does not
affect the 24V DC auxiliary power input (letter “K” on
next page).
Green LED, one for each output channel, illuminates
when output signal level exceeds 100 mV (45 dB below
full power) from the 4-ohm tap. Does not respond to sig-
nals from the AMP INPUT connector.
Figure 1.1 Front Panel Controls and Indicators
page 6
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
1 Welcome
2. Global enable switch for phantom power. Does not affect
RCA inputs. Default position is off.
two connectors per input channel. If required, both the mic/
line and RCA inputs may be used at the same time. The mic/
line gain switch does not affect the RCA gain, which is fixed
relative to mic/line. The mic/line and RCA signals are
mixed. Note: Other equipment connected to the RCA jacks
should be connected to the same AC power source as the
mixer-amp to avoid hum.
mixer-amplifier. Or used to connect an external processor
(see Section 2.9).
1.3 Back Panel Controls and Connectors
J. Reset Switch
Resets the circuit breaker that protects the power supply.
220/230/240V units have a fuse instead.
N. Input Routing Switch (280MA only)
DIP switches that assign each input signal to each output.
Two switches per input.
W. Line Out Connector
One 3-pin balanced Phoenix-type connector per output
channel. Post master, pre-VCA. Level controlled by master
volume control.
K. Auxiliary Power Input
2-position terminal strip for 24 VDC ( 10%) backup power.
Accepts up to 10 AWG terminal forks. NOTE: To
prevent a spark when attaching a battery, have
unit turned on and connected to the mains supply.
O. Link In/Out Switch
Slide switch, one per channel. With the Link Switch IN, any
signal applied to the Amp Input connector will be mixed
with the input signal(s). With the Link Switch OUT, only the
signal from the Amp Input Connector will appear at the
amplifier output.
S. AC Power Inlet
Detachable IEC.
X. Tone Generator Connector
5-pin Phoenix-type connector. Tones include Pre-Announce
Chime, Bell, Alert Tone, and Evacuate Tone. All tones are
activated by contact closures on the connector.
T. Priority Connector
L. Amplifier Outputs Connectors
3-pin Phoenix-type connector allows Input 1 or Input 5
(280MA only) to mute other input signals by contact clo-
sure.
One per channel, 4-position terminal strip with COM (Com-
mon), 4 ohms, 70V and 100V terminals. Accepts up to 14
AWG terminal forks. Non-touch cover included.
Y. Tone Level
P. Mic/Line Input Connector
3-pin Phoenix-type, balanced, one per input channel.
One potentiometer per output channel sets the volume of
the tones. Tone level is not affected by output volume con-
trols or VCAs.
U. Output VCA Connector
M. Amp Config Switch
A DIP switch with two functions:
1. Assigns one of the inputs as the priority input for each
output, thereby temporarily muting the remaining inputs.
Muting is activated by contact closure.
Q. Mic/line Switch
Selects mic-level or line-level input signals. One switch for
each balanced input.
4-pin Phoenix-type connector for one (180MA) or two
(280MA) VCA control lines of +10 VDC and ground. Com-
patible with Crown 1-VCAP and 4-VCAP modules.
The Pre-Announce Chime is a special case. It is mixed with
Channel-1 signals, so its level will be affected by the master
volume control and VCAs.
R. Dual RCA Input Connector
V. Amp Input Connector
For stereo music signals, unbalanced, summed together,
3-pin Phoenix-type, high-impedance balanced, one per
amplifier channel. Used to link an additional mixer to the
NO FUNCTION
S
Figure 1.2 Back Panel Controls and Connectors
(280MA shown)
Operation Manual
page 7
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Commercial Audio Series Mixer-Amplifiers
2 Setup
2.1 Installation
2.2 How to Attach Rack Ears
CAUTION: Before you begin, make sure your
mixer-amplifier is disconnected from the
power source, with the power switch in the
“off” position and all level controls turned
completely down (counterclockwise).
1. Locate the two rack ears and two rack-ear screws
supplied.
2. See Figure 2.2. Remove the two screws from each
side of the chassis near the front.
3. Place a rack ear flush with the right front of the
chassis.
4. Insert a screw that you removed into the bottom
hole of the rack ear and chassis. Screw it in.
5. Insert a screw that you removed into the center
hole of the rack ear and chassis. Screw it in.
6. Insert one of the supplied screws into the top hole
of the rack ear and chassis. Screw it in.
7. Repeat steps 3-6 for the left side of the chassis.
Use a standard 19-inch (48.3 cm) equipment rack
(EIA RS-310B). See Figure 2.1 for amplifier dimen-
sions.
You may also stack mixer-amps without using a
cabinet, or you may place a single mixer-amp on a
surface with 12 inches of air space around the unit
for convection cooling.
Figure 2.2 How to Connect Rack Ears
NOTE: When transporting in a rack, mixer-amps
should be supported at the front and back.
When using an equipment rack, do not mount units
directly on top of each other. Allow 2 U between
units for convection cooling. 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.
3.5 In.
8.9 cm
4.1 In.
10.5 cm
17.3 In.
43.8 cm
12.2 In.
31.0 cm
13.9 In.
35.2 cm
Figure 2.1 Dimensions
page 8
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
2 Setup
2.3 Choose Input Wire and Connectors
Crown recommends using pre-built or professionally wired bal-
anced line (two-conductor plus shield), 22-24 gauge cables and
connectors. You should use 3-pin Phoenix-type cable ends at the
amplifier inputs. Unbalanced line may also be used but may
result in noise over long cable runs.
Figure 2.3 Balanced Input
Connector Wiring
MIXER-AMP INPUT
Figure 2.3 shows connector pin assignments for balanced wir-
ing, and Figure 2.4 shows connector pin assignments for unbal-
anced wiring. The RCA input connectors can also be used for
unbalanced inputs.
Figure 2.4 Unbalanced Input
Connector Wiring
2.4 Choose Output Wire and Connectors
For the amplifier output connectors, Crown recommends using
pre-built or professionally wired, high-quality, two-conductor,
heavy gauge speaker wire and connectors. You may use crimp-
on spade lugs for your output connectors (Figure 2.5). To prevent
the possibility of short-circuits, wrap or otherwise insulate
exposed loudspeaker cable connectors. Cover the output con-
nections with the supplied non-touch cover.
MIXER-AMP INPUT
BALANCED LINE
SHIELD
S
Using the guidelines below, select the appropriate size of wire
based on the distance from amplifier to speaker. The wire sizes
apply to the 4-ohm tap.
TO DESTINATION
OUTPUT
Distance
up to 25 ft.
Wire Size
16 AWG
26-40 ft.
41-60 ft.
14 AWG
12 AWG
10 AWG
8 AWG
UNBALANCED LINE
TO DESTINATION
UNGROUNDED
PRODUCT WITH
2-PRONG POWER
CORD ONLY
61-100 ft.
101-150 ft.
151-250 ft.
SHIELD
S
6 AWG
(This connection reduces
the signal level by 6 dB.)
OUTPUT
NOTE: Custom wiring should only be performed by
qualified personnel. Class 2 wiring is required.
CAUTION: Never use shielded cable for output power
wiring.
Figure 2.5 Two Amplifier Output Connectors on
280MA Back Panel
(One Connector in 180MA and 1160MA)
Figure 2.6 Line Out Wiring.
Top: Balanced. Bottom: Unbalanced.
Use 2-conductor shielded cable and 3-pin Phoenix-type
connectors for Line Output wiring (Figure 2.6)
Operation Manual
page 9
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Commercial Audio Series Mixer-Amplifiers
2 Setup
2.5 Wire Your System
Typical input and output wiring is shown in Figure 2.7
INPUTS: Connect microphones or balanced line-level
sources to mixer-amplifier balanced inputs. Set Mic/Line
switches accordingly. Connect unbalanced line-level sig-
nals to RCA input connectors.
Ceiling Speakers
LM-301A
OUTPUTS: Maintain proper polarity (+/–) on output con-
nectors.
For each amplifier channel, connect the Amplifier Output
screw terminals to the loudspeaker loads. Use terminals
marked COM and 4 OHMS for a 4-ohm loudspeaker load,
or use terminals marked COM and 70V or 100V for con-
stant-voltage loudspeaker loads.
LM-201
PZM-11LLWR
Connect the COM terminal to speaker negative (–) lead;
connect one of the other terminals to speaker positive (+)
lead.
For more application drawings, see the enclosed
Commercial Audio Mixer-Amplifier Quick-Start Guide.
Satellite Receiver
Dual Drive CD
NOTE: Crown provides a reference of wiring pin assign-
ments for commonly used connector types in the Crown
Amplifier Application Guide available at www.crownaudio.
CD
1-VCAP
DVD / VCR
Figure 2.7 Input and Output Wiring
page 10
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
One DIP-switch selection enables Channel 1 as the priority input, which
mutes all other inputs to Amp 1. In the 280MA only, another DIP switch
selection enables Channel 5 as the priority input, which mutes all other
inputs to Amp 2. In the 280MA only, another set of DIP switches enable
Channel 1 as the priority input into both Amp 1 and Amp 2, effectively
muting any input.
2.6 Input Routing
To give priority to the Channel-1 input in Amp 1 and Amp 2:
Set the AMP CONFIG DIP switch as follows:
1 OFF
2 ON
3 ON
4 ON
In the 280MA, any input can be assigned to Amp 1, Amp 2 or both. The
two DIP switches labeled INPUT ROUTING are used (Figure 2.8). Follow
the settings printed on the back panel next to the INPUT ROUTING switch.
For example, to send input Channel 3 to Amp 1 and Amp 2, turn on DIP
switches 13 and 14.
To set the mixer-amplifier for normal mode with no priority:
Set the AMP CONFIG DIP switch as follows:
1 ON
Also, wire a SPST switch to the PRIORITY connector between COM and
CH1 AMP 1. Close the switch when you want the Channel-1 input to
mute all other inputs feeding Amp 1 and Amp 2.
2 OFF
3 OFF
4 OFF
5 ON
Note: The routing configuration is extremely versatile. Many configura-
tions for additional applications not highlighted in this document can be
created by examining the signal flow in the block diagram on page 13.
6 OFF
2.9 Link In/Out Switches
Figure 2.8 Input Routing DIP Switches
To give priority to the Channel-1 input in Amp 1 only:
Set the AMP CONFIG DIP switch as follows:
1 OFF
2 ON
3 OFF
4 OFF
These switches (Figure 2.10) affect which signals are heard when another
mixer is wired to the mixer-amplifier. One switch is included per amplifier
channel.
IN: Any signal applied to the AMP INPUT connector will be mixed with
the input signal(s).
2.7 Phantom Power
To turn on phantom power on all mic inputs, turn on the switch number 7
in the AMP CONFIG DIP switch.
OUT: Only the signal from the AMP INPUT connector will appear at the
amplifier output.
2.8 Priority Muting
Also, wire a SPST switch to the PRIORITY connector between COM and
CH 1 AMP 1. Close the switch when you want the Channel-1 input to
mute all other inputs feeding Amp 1.
A back-panel AMP CONFIG DIP switch (Figure 2.9) can assign Input Ch.
1 or Input Ch. 5 as the priority input for each amplifier output, which tem-
porarily mutes the remaining inputs. Muting is activated by contact clo-
sures.
How to link another mixer to your mixer-amplifier:
Connect the extra mixer’s LINE OUT connector to the mixer-amplifier’s
AMP INPUT connector. Set the Link switch to IN.
To give priority to the Channel-5 input in Amp 2 only:
Set the AMP CONFIG DIP switch as follows:
How to set up Music-On-Hold output:
Connect mixer-amp LINE OUT to Music-On-Hold input on telephone
system interface/PBX. Set the LINK SWITCH to IN.
5 OFF
6 ON
For example, suppose you configured Channel 1 as the priority input. Mic
1 is plugged into Channel 1. A press-to-talk switch in Mic 1 is wired to
the Priority connector in the mixer-amplifier. When you press the mic
switch, all other signals are muted so you can make an announcement on
Mic 1.
Also, wire a SPST switch to the PRIORITY connector between COM and
CH 5 AMP 2. Close the switch when you want the Channel-5 input to
mute all other inputs feeding Amp 2.
How to set up a processing loop:
Connect mixer-amp LINE OUT to processor input. Connect processor
output to mixer-amp AMP INPUT connector. Set the Link switch to OUT.
Figure 2.9 AMP CONFIG DIP Switch
Figure 2.10
Link In/Out Switches
Operation Manual
page 11
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Commercial Audio Series Mixer-Amplifiers
2 Setup
2.11 Four-Tone Generator
2.12 Powering Up
2.10 Remote Volume Control
1. Turn off any equipment connected to the Line Out connectors.
2. Plug the amplifier’s power cord into a 3-wire grounded AC outlet.
3. Turn down the input volume controls.
Your mixer-amplifier can generate tones. The factory-preset tones include
Pre-Announce Chime, Bell, Alert Tone, and Evacuate Tone. All tones are
continuous except for Pre-Announce Chime. All tones are activated by
contact closures on the back panel. The Bell, Alert, and Evacuation tones
do not pass through the pre-amp outputs.
You can control the volume of each amplifier channel remotely. To do so,
locate the OUTPUT VCA connector on the back panel. Insert a 4-pin Phoe-
nix-type cable connector into the OUTPUT VCA connector. Wire a Crown
1-VCAP or 4-VCAP level control to the Phoenix-type cable connector ter-
minals as shown in Figure 2.11.
4. Turn down the master volume control.
5. Turn on the Power switch. The Power indicator should glow.
6. Turn the input volume controls in use about 3/4 up.
7. Turn up the master volume control(s) until the desired loudness or
power level is achieved.
8. Touch up the input levels as needed for equal loudness from each
microphone.
Tone levels (except for Pre-Announce Chime) are controlled by one trim-
pot for each amplifier output. Tone levels are not affected by the master
level control. Tones mute all signals except for priority signals from Ch.1
and Ch.5. When Ch. 1 or Ch. 5 mutes other signals, the tone and voice
signals are mixed.
1-VCAP controls one channel; 4-VCAP controls up to four channels.
Output VCA Connector
9. Turn on any equipment connected to the Line Out connectors.
If you ever need to make any wiring or installation changes, disconnect the
power cord.
If you want to generate a tone, locate the TONE GENERATOR connector on
the back panel (Figure 2.12). Plug a 5-pin Phoenix-type cable connector
into that chassis connector. To activate the Pre-Announce Chime, wire a
SPST switch across COM and PRE-ANNOUNCE in the Phoenix-type cable
connector. Close the switch when you want the Chime tone to sound. Other
tones work in a similar way. Set the TONE GEN LEVEL potentiometer(s) for
the desired tone volume.
Phoenix-type
plug
2.13 Included Accessories
Power cord
Detachable rack ears
Screws for rack ears
Non-touch cover for output connectors
Phoenix-type connectors
Spade lugs
For example, you might put a magnetic contact closure switch in a door,
and wire it to the COM and PRE-ANNOUNCE pins. When the door opens,
the switch closes and the chime is activated.
Output VCA Connector
2.14 Optional Accessories
The Pre-Announce Chime is mixed with Ch. 1 signals only. Its output level
is not affected by the Tone Gen Level controls.
1-VCAP remote volume control for one channel
4-VCAP remote volume control for four channels
Note: The Pre-Announce Chime works only on input Ch.1, not
input Ch. 5.
Figure 2.11 Wiring a 1-VCAP or 4-VCAP
Level Control to the Output VCA Connector
Figure 2.12 Tone Generator Connector
page 12
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
2 Setup
2.15 Block Diagram
280MA Block Diagram
Pre-Announce Gain
Phantom Power
Pre-Announce
Version 1.0
Pre-Announce
Chim e
Input Gain
Line
Preamp Line Out
1
SPI 1
Clip
1
AMP Out
1
Mic/Line
[Bal]
Mi c
Ch 1 Priority
[SW2]
100V
70V
Output
Transformer
SPI
Link
Out
In
Power
AMP
1
VCA
HP Filter
VC A
CH
1
Tone Control
4 Ohms
COM
Amp Input
1
Ch 1 Normal
[SW1]
Ch 1 to Amp
[SW9]
1
RCA
Limiter
Master 1
Mute
VCA
1
Scaling
Bass
SPI
Trebl e
Gain 1
Tone Gen Level
Amp 1
Ch 1 to Amp
[SW10]
2
Input Gain
Line
Mi c
Mic/Line
[Bal]
Authorized personnel only:
Remove internal jumpers Z1 and Z4
to disable tones for Amp 1
Ch 2 to Amp
[SW11]
1
Ch 1 Amp
Priority
Ch 5 Amp
1
Z1
Z2
Z3
Tone
Generator
Bell
2
CH
2
Alert
Evac
Tone Control
Z4
Authorized personnel only:
Remove internal jumpers Z2 and Z3
to disable tones for Amp 2
RCA
Ch 2 to Amp
[SW12]
2
Tone Gen Level
Amp 2
Bass
Trebl e
2
Gain 2
Ch 3 and Ch 4 similar to Ch
Preamp
Line Out
Input Gain
2
SPI 2
Clip
2
Line
Mi c
Mic/Line
[Bal]
Mute
Link
Out
In
Ch 5 Priority
[SW6]
SPI
Power
AMP
HP Filter
VC A
2
Mute
VCA
CH
5
Tone Control
Amp Input
2
Ch 1 Over Ch
[SW 4]
5
Ch 5 Normal
[SW5]
Limiter
RCA
Ch 5 to Amp
[SW17]
1
Master 2
Priority
VCA
2
Scaling
Bass
Trebl e
Gain 5
Ch 1 Over Ch
[SW 3]
5
Input Gain
Ch 5 to Amp
[SW18]
2
Line
Mi c
Mic/Line
[Bal]
AMP Out
2
SPI
Ch 6 to Amp
[SW19]
1
100V
70V
Output
Transformer
CH
6
Tone Control
4 Ohms
COM
RCA
Ch 6 to Amp
[SW20]
2
Typical Signal Path, Amp 1
Typical Signal Path, Amp 2
Bass
Trebl e
6
Gain 6
Ch 7 and Ch 8 similar to Ch
Operation Manual
page 13
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Commercial Audio Series Mixer-Amplifiers
3 Troubleshooting
CONDITION: No sound.
CONDITION: No power to the
mixer-amplifier.
POSSIBLE REASON:
POSSIBLE REASON:
•
The amplifier is in “fault” mode. A Fault status
can be triggered when one of the amplifier’s
protection circuits is activated. First disconnect
your speakers from the affected channel(s) one
by one to determine if one of the loads is
shorted. If an amplifier channel has a thermal
fault, there will be no indication on the front
panel, but the amp will recover after cooling. If
operation does not return to normal after
restarting your amp, check the fuse and replace
if necessary, or return mixer-amp to Crown or
an authorized Crown Service Center for servic-
ing.
•
•
The mixer-amplifier’s Power switch is off.
The mixer-amplifier is not plugged into the
power receptacle.
•
The mixer-amplifier’s high-voltage power sup-
ply circuit breaker has tripped, or the fuse has
opened on 220/230/240V models. Verify that
the AC mains voltage is correct, then press the
Reset button on the back panel.
•
If the unit is operated from a 24V DC supply,
the internal fuse may have opened. (The power
switch has no effect on 24V operation.)
•
•
No input signal.
Input signal level is very low.
CONDITION: Distorted sound.
POSSIBLE REASON:
•
Input signal level is too high. Turn down your
input volume controls. NOTE: Your mixer-
amplifier should never be operated at a level
which causes the Clip LEDS to illuminate con-
stantly.
•
Master volume level is too high. Turn it down
to about 3/4 of maximum level.
page 14
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
4 Specifications
Minimum Guaranteed Power
180MA
280MA
1160MA
120 VAC, 60 Hz Units, per channel, all channels driven
1 kHz with 0.5% THD
Minimum guaranteed power per channel into 4 ohms or 70V/100V output
80W
80W
160W
Performance
180MA
280MA
1160MA
Number of input channels
4
1
8
2
4
1
Number of power amplifiers
Input Sensitivity (volts RMS) for full output at maximum gain
3 mV
800 mV
400 mV
3 mV
800 mV
400 mV
3 mV
800 mV
400 mV
Balanced mic inputs
Balanced line inputs
RCA connectors
Frequency Response (at 1 watt from 4-ohm tap, 70 Hz - 19 kHz)
Frequency Response (at line out, 20 Hz to 20 kHz)
Power Bandwidth (at 4-ohm tap, 2 dB below maximum 1 kHz power)
Signal to Noise Ratio (ref. to rated power, master volume at minimum)
Total Harmonic Distortion (THD) at rated power at 1 kHz
DC Output Offset
1 dB
1 dB
1 dB
1 dB
1 dB
1 dB
50 Hz to 20 kHz with < 0.5% THD
50 Hz to 20 kHz with < 0.5% THD
50 Hz to 20 kHz with < 0.5% THD
85 dB
85 dB
85 dB
< 0.5%
< 0.5%
< 0.5%
<
5 mV
<
5 mV
<
5 mV
Input Impedance (nominal)
Mic: 400 ohms, Line: 100 kilohms,
RCA: 50 kilohms
Mic: 400 ohms, Line: 100 kilohms,
RCA: 50 kilohms
Mic: 400 ohms, Line: 100 kilohms,
RCA: 50 kilohms
Crosstalk (all controls at “10”)
Line Output Level (nominal)
Phantom Power
–70 dB at 1 kHz
1V into 10 kilohms
15 VDC
–70 dB at 1 kHz
1V into 10 kilohms
15 VDC
–70 dB at 1 kHz
1V into 10 kilohms
15 VDC
AC Line Voltages Available
100V 50/60 Hz
120V 60 Hz
100V 50/60 Hz
120V 60 Hz
100V 50/60 Hz
120V 60 Hz
220V 50/60 Hz
230V 50/60 Hz
240V 50/60 Hz
220V 50/60 Hz
230V 50/60 Hz
240V 50/60 Hz
220V 50/60 Hz
230V 50/60 Hz
240V 50/60 Hz
o
o
o
o
o
o
Operating Temperature/Humidity
Storage Temperature
0
C to 40 C at 95% relative humidity
0
C to 40 C at 95% relative humidity
0
C to 40 C at 95% relative humidity
(non-condensing)
(non-condensing)
(non-condensing)
o
o
o
o
o
o
–20 C to 85
180MA
C
–20 C to 85
C
–20 C to 85
1160MA
C
Construction
280MA
Cooling
Convection cooled
Convection cooled
Convection cooled
Dimensions: Width, Height, Depth (behind mounting surface)
EIA Standard 19" W (EIA RS-310-B)
x 3.5" (8.9 cm) H x14" (35.6cm) D
EIA Standard 19" W (EIA RS-310-B)
x 3.5" (8.9 cm) H x14" (35.6cm) D
EIA Standard 19" W (EIA RS-310-B)
x 3.5" (8.9 cm) H x14" (35.6cm) D
Net Weight, Shipping Weight
21.0 lb. (9.5 kg), 26.0 lb. (11.8 kg)
25.3lb.(11.5kg),30.3lb.(13.7kg)
2 5 . 3 l b . ( 1 1 . 5 k g ) , 3 0 . 3 l b . ( 1 3 . 7 k g )
Operation Manual
page 15
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Commercial Audio Series Mixer-Amplifiers
5 Service
Crown amplifiers are quality units that rarely require ser-
vicing. Before returning your unit for servicing, please
contact Crown Technical Support to verify the need for
servicing.
4. Use a bold black marker and write the SRA number
ber 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
on three sides of the box.
Cardboard
support
5. Record the SRA number for future reference. The
SRA number can be used to check the repair status.
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:
5.2.2 Factory Service
5.2.4 Packing Instructions
Mixer-amp
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 ser-
viceable prior to sending it to the factory. Serviceable
product list is available at
Important: These instructions must be followed. If they
are not followed, Crown Audio, Inc. assumes no respon-
sibility 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.
Bag
Cardboard
support
For more information, please contact us direct.
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.
1. Fill out and include the Crown Audio Factory Ser-
vice Information sheet in the back of this manual.
A Service Return Authorization (SRA) is required for
product being sent to the factory for repair. An SRA can
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 in North America, Puerto
Rico and the Virgin Islands only.
2. Do not ship any accessories (manuals, cords, hard-
ware, etc.) with your unit. These items are not
needed to service your product. We will not be
responsible for these items.
Figure 9.1 Packing.
Put this assembly in carton.
5.2.5 Estimate Approval
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 (Figure 9.1). If you do not have the
original box, please call Crown at 800.342.6939 or
574.294.8210 and order new pack material. (Do not
ship your unit in a wood or metal cabinet.)
Approval of estimate must be given within 90 days after
being notified by Crown Audio Inc. Units still in the pos-
session of Crown after 90 days of the estimate will
become the property of Crown Audio Inc.
5.1 Worldwide Service
Service may be obtained from an authorized service cen-
ter. (Contact your local Crown/Amcron 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.
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 send-
ing 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.
5.2.6 Payment of Non-Warranty Repairs
Payment on out-of-warranty repairs must be received
within 90 days of the repair date. Units unclaimed after
90 days become the property of Crown Audio Inc.
4. If you provide your own shipping pack, the mini-
mum recommended requirements for materials are
as follows:
Your repaired unit will be returned via UPS ground.
Please contact us if other arrangements are required.
Remember to transport your unit in the original factory
pack.
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.
5.2.3 Factory Service Shipping Instruc-
tions:
5.2 US and Canada Service
Crown Factory Service
1718 W. Mishawaka Rd.,
Elkhart, Indiana 46517 U.S.A.
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.
1. Service Return Authorization (SRA) is required for
product being sent to the factory for service. Please
dio.com/support/factserv.htm. If you do not have
access to our website, call 1.800.342.6939, exten-
sion 8205 and we'll create the SRA for you.
b. Securely seal the package with an adequate car-
ton 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.
5.2.1 Service at a US or Canada Service
Center
This method usually saves the most time and effort. Sim-
ply 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. Remem-
2. See packing instructions that follow.
Facsimile:
574.294.8301 (Technical Support)
574.294.8124 (Factory Service)
3. Ship product to:
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.
CROWN AUDIO FACTORY SERVICE
1718 W MISHAWKA RD.
ELKHART, IN 46517
Internet:
page 16
Operation Manual
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Commercial Audio Series Mixer-Amplifiers
6 Warranty
UNITED STATES & CANADA
SUMMARY OF WARRANTY
est, insurance, closing costs, and other finance
charges less a reasonable depreciation on the
product from the date of original purchase. War-
ranty work can only be performed at our autho-
rized 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 defec-
tive 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 for-
eign country and the port of entry in the United
States including the return shipment, and all
taxes, duties, and other customs fees for such for-
eign shipments.)
FROM ANY DEFECT IN THE NEW CROWN
PRODUCT. THIS INCLUDES ANY DAMAGE TO
ANOTHER PRODUCT OR PRODUCTS RESULT-
ING FROM SUCH A DEFECT. SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATIONS
OF INCIDENTAL OR CONSEQUENTIAL DAM-
AGES, SO THE ABOVE LIMITATION OR EXCLU-
SION 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 SUB-
SEQUENT 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 War-
ranty.
WARRANTY ALTERATIONS
No person has the authority to enlarge, amend, or
modify this Crown Warranty. This Crown War-
ranty 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.
ITEMS EXCLUDED FROM THIS
CROWN WARRANTY
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 inten-
tional 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
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.
You must notify us of your need for warranty ser-
vice within the warranty period. All 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 reason-
able 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 autho-
rized service center immediately.
LEGAL REMEDIES OF PURCHASER
WHAT THE WARRANTOR WILL DO
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.
We will remedy any defect, regardless of the rea-
son for failure (except as excluded), by repair,
replacement, or refund. We may not elect refund
unless you agree, or unless we are unable to pro-
vide 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 inter-
DISCLAIMER OF CONSEQUENTIAL
AND INCIDENTAL DAMAGES
THIS STATEMENT OF WARRANTY SUPERSEDES
ANY OTHERS CONTAINED IN THIS MANUAL
YOU ARE NOT ENTITLED TO RECOVER FROM
US ANY INCIDENTAL DAMAGES RESULTING
FOR CROWN PRODUCTS.
12/01
Operation Manual
page 17
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Commercial Audio Series Mixer-Amplifiers
6 Warranty
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 SUB-
SEQUENT OWNER of each NEW Crown1 product,
for a period of three (3) years from the date of pur-
chase 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 rea-
son for failure (except as excluded), by repair,
replacement, or refund. We may not elect refund
unless you agree, or unless we are unable to pro-
vide 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 inter-
est, insurance, closing costs, and other finance
charges less a reasonable depreciation on the
product from the date of original purchase. War-
ranty work can only be performed at our autho-
rized service centers. We will remedy the defect
and ship the product from the service center
within a reasonable time after receipt of the defec-
tive 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.
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
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 inten-
tional 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.
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.
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 cen-
ter are not satisfactory, notify our authorized ser-
vice 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.
7/01
page 18
Operation Manual
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Commercial Audio Series Mixer-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: __________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
Operation Manual
page 19
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