Crown 1160ma Specification Guide

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180MA, 280MA and 1160MA are 

high-value mixer-amplifi ers for commercial 
and industrial audio. They provide 4-ohm 

and constant-voltage outputs (70V and 100V).

Some applications include schools, hospitals, 
factories, restaurant/retail, houses of worship, 
fi tness facilities, A/V boardrooms, prisons, and 
small offi ces. Typical uses are paging, background 
music, security and evacuation instructions. 

The mixer-amps vary in their number of inputs, 
number of outputs, and power range:

• 180MA has 4 inputs and one 80W power ampli-
fi er for single-zone systems.

• 280MA has 8 inputs and dual 80W power ampli-
fi ers for two-zone systems.

• 1160MA has 4 inputs and one 160W power 
amplifi er for single-zone systems.

Input routing allows each input to be assigned to 
any output. This drastically reduces the need for 
additional mixers or amplifi ers (or both) when 
systems require either more inputs or outputs.

However, each mixer-amplifi er can be upgraded as 
a facility expands. For example, you can add more 
mixers for more inputs, or add more power amps 
to handle more zones.

Other features include priority muting, phantom 
power, and capability for remote volume control.

Frequency Reponse (at 1 watt from 4-ohm tap): 
70 Hz to 19 kHz ± 1 dB.

Frequency Response (at line out): 20 Hz to 20 
kHz ± 1 dB.

Power Bandwidth (at 4-ohm tap, 2 dB below 
maxium 1 kHz power): 50 Hz to 20 kHz with 
< 0.5% THD

Signal to Noise Ratio (ref. to rated power, 
master volume at minimum): 85 dB.

DC Output Offset: < ±5 mV. 

THD: Less than 0.5% at rated power at 1 kHz. 

Balanced mic inputs: 3 mV.
Balanced line inputs: 800 mV.
RCA connectors: 400 mV.

Input Impedance (nominal): 
Mic: 400 ohms.
Line: 100 kilohms.
RCA: 50 kilohms.

Crosstalk: –70dB at 1kHz.

Line Output Level (nominal): 1V into 10 kilohms.

Phantom Power: 15 VDC.

AC Line Voltages Available: 
100V  50/60 Hz
120V  60 Hz
220V  50/60 Hz
230V  50/60 Hz
240V  50/60 Hz

Operating Temperature/Humidy:  0° C to 40° C at 
95% relative humidity (non-condensing). 

Storage Temperature: –20° C to 85° C.

Power Switch: Pushbutton on-off switch. The 
power switch does not affect the 24V DC auxiliary 
power input.

Input Volume Controls: Microphone/line, four in 
180MA and 1160MA, eight in 280MA. Detented 
potentiometers with knobs. 

Tone Controls: Bass and Treble non-detented 
recessed potentiometers on each input channel. 
Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz. 

Power Indicator: Blue LED indicates power on.

Input Signal Presence Indicator: Green LED, one 
for each input channel, illuminates when input 
signal exceeds –24 dBu (line) or –70 dBu (mic). 

Output Signal Presence Indicator: 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 signals from the AMP INPUT connector. 

•  4 or 8 inputs, 1 or 2 amplifi er output channels

•  Ideal for commercial and industrial use

•  Balanced Phoenix-type mic/line inputs; 

touch-proof screw-terminal speaker outputs

•    Any input can be sent to any output

•    Priority muting

•   Independent bass and treble controls for 

each input

•  Three-Year, No-Fault, Fully Transferable 

Warranty completely protects your invest-
ment and guarantees its specifi cations

1 kHz 
Power

Minimum guaranteed power 
into 4 ohms or 70V/100V output

*1 kHz Power: refers to maximum power in watts at 
1 kHz with 0.5% THD.

*

1 kHz 
Power

Minimum guaranteed power 
per channel into 4 ohms or 
70V/100V output

*1 kHz Power: refers to maximum power in watts at 
1 kHz with 0.5% THD.

*

1 kHz 
Power

Minimum guaranteed power 
into 4 ohms or 70V/100V output

*1 kHz Power: refers to maximum power in watts at 
1 kHz with 0.5% THD.

*