Crown Audio Stereo Amplifier 180MA User Manual

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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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  
 
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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