280A Manuals

C O M M E R C I A L   A U D I O   S E R I E S 
The Crown® 180A, 280A, and 1160A are 
high-value amplifi ers for commercial and 
industrial audio. They provide 4-ohm and 
constant-voltage outputs (70V and 100V). The 
amps are part of Crown’s Commercial Audio 
Series, which also includes mixers and mixer-
amps. These low-cost units provide all necessary 
•  1 or 2 inputs, 1 or 2 amplifi er output chan-
breaker/fuse, and thermal protection; details 
features in a simple building-block format. 
available online at www.crownaudio.com
The amplifi ers vary in their number of inputs, 
•  Ideal for commercial and industrial use
•  Three-Year, No-Fault, Fully Transferable War-
number of outputs, and power range:
•  Balanced Phoenix-type line inputs; touch-
ranty completely protects your investment 
• 180A has 1 input and one 80W power amplifi er 
proofed screw-terminal speaker outputs
and guarantees its specifi cations
for single-zone systems.
•  Advanced protection system includes output 
• 280A has 2 inputs and dual 80W power ampli-
current limiting, DC protection, circuit 
fi ers for two-zone systems.
• 1160A has 1 input and one 160W power ampli-
fi er for single-zone systems.
Some applications include schools, hospitals, 
Operating Temperature/Humidity:  0° C to 40° C 
factories, restaurant/retail, houses of worship, 
at 95% relative humidity (non-condensing). 
fi tness facilities, A/V boardrooms, prisons, and 
1 kHz 
Storage Temperature: –20° C to 85° C.
small offi ces. Typical uses are paging, background 
music, security and evacuation instructions.
Minimum guaranteed power 
Front Panel Controls and Indicators
The sound system can be upgraded as a facility 
into 4 ohms or 70V/100V output
expands. For example, you can add more mixers 
Power Switch: Pushbutton on-off switch. The 
for more inputs, or add more power amps (or 
power switch does not affect the 24V DC auxiliary 
mixer-amps) to handle more zones.
power input.
*1 kHz Power: refers to maximum power in watts at 
1 kHz with 0.5% THD.
Power Indicator: Blue LED indicates power on.
Specifi cations
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. 
Frequency Reponse (at 1 watt from 4-ohm tap): 
70 Hz to 19 kHz +/- 1 dB.
Clip Indicators: Red LED, one per output channel. 
Illuminates at threshold of audible distortion. 
Frequency Response (at line out): 20 Hz to 20 
kHz +/- 1 dB.
Master Volume Controls: One per output channel. 
1 kHz 
Detented potentiometer with knob.
Power Bandwidth (at 4-ohm tap, 2 dB below 
maxium 1 kHz power): 50 Hz to 20 kHz with 
Tone Controls: Bass and Treble non-detented 
< 0.5% THD
potentiometers on each channel. Bass ±10 dB at 
Minimum guaranteed power 
100 Hz, Treble ±10 dB at 10 kHz.
Signal to Noise Ratio (ref. to rated power, master 
per channel into 4 ohms or 
volume at minimum): 85 dB.
70V/100V output
DC Output Offset: < ±5 mV. 
Back Panel Controls and Connectors
*1 kHz Power: refers to maximum power in watts at 
THD: Less than 0.5% at rated power at 1 kHz. 
Reset Switch: Resets the circuit breaker that 
1 kHz with 0.5% THD.
protects the power supply. 220/230/240V units 
Input Sensitivity (for full output at maximum 
have a fuse instead.
gain): 800 mV.
AC Power Inlet: Detachable IEC. 
Input Impedance (nominal): 100 kilohms.
Auxiliary Power Input: 2-position terminal strip 
Minimum Load Impedance:
for 24 VDC (±10%) backup power. Accepts up to 
100V output: 160 ohms.
14 AWG terminal forks.
70V output: 80 ohms.
4-ohm output: 4/8 ohms.
Amplifi er Outputs Connectors: One per channel, 
1 kHz 
4-position terminal strip with COM (Common), 4 
Crosstalk (all controls at “10”): –70 dB at 1kHz.
ohms, 70V and 100V terminals. Accepts up to 10 
Line Output Level (nominal): 1V into 10 kilohms.
AWG terminal forks. Non-touch cover included.
Minimum guaranteed power 
AC Line Voltages Available: 
into 4 ohms or 70V/100V output
Output VCA Connector: One for every two chan-
100V  50/60 Hz
nels, 4-pin Phoenix-type connector for two VCA 
120V  60 Hz
control lines of +10 VDC and ground. Compatible 
220V  50/60 Hz
with Crown 1-VCAP and 4-VCAP modules. 
*1 kHz Power: refers to maximum power in watts at 
230V  50/60 Hz
1 kHz with 0.5% THD.
240V  50/60 Hz

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