280MA (discontinued)

Eight Input, Dual 80W Mixer-Amplifier

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Crown’s Commercial Audio mixer/amplifiers deliver legendary Crown quality to the commercial audio industry. These high-value mixer/amplifiers provide both 4-ohm and constant-voltage outputs (70V and 100V) for use in a wide range of commercial applications including schools, hospitals, factories, restaurant/retail, houses of worship, fitness facilities, A/V boardrooms, prisons, and small offices. Easily configured for a range of uses such as paging, background music, security, and evacuation instructions, Crown’s Commercial Audio units are the smart choice for commercial sound.

For more commercial mixer-amplifier options, check out the JBL Commercial Series

Recommended for: Commercial.

More Details

Please note: the tone generator has been omitted. Contact Crown Technical Support if you have a tone generator question. For product already in service with the tone generator feature, please see this Important Errata Information.

  • The 180MA has 4 inputs and one 80W power amplifier
  • The 1160MA has 4 inputs and one 160W power amplifier
  • The 280MA has 8 inputs and dual 80W power amplifiers


  • 4 to 8 inputs, 1 to 2 amplifier output channels
  • Ideal for commercial and industrial use
  • Expandable by adding Crown Commercial Audio Series mixers or power amplifiers
  • Balanced Phoenix-type mic/line inputs; touch-proof screw-terminal speaker outputs
  • Any input can be sent to any output
  • Priority muting
  • Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications


  Version Language Size Uploaded
    1.71 MB Aug 27, 2015
Declaration Of Conformities
    79.3 KB Aug 27, 2015
Data Sheets
180MA, 280MA, 1160MA Data Sheet
updated: Aug 27, 2015
    403 KB Aug 27, 2015
Quick Start Guides
180MA, 280MA, 1160MA QSG
updated: Aug 27, 2015
    160 KB Aug 27, 2015
A&E (Architectural & Engineering) Specifications
280MA A&E Specs
updated: Aug 27, 2015
    83.5 KB Aug 27, 2015

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Frequency Response (at 1 watt from 4-ohm tap): 70 Hz to 19 kHz +/-1 dB, (at line out): 20 Hz to 20 kHz +/- 1 dB
Power Bandwidth (at 4-ohm tap, 2 dB below maximum 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
Input Sensitivity (for full output at miximum gain): 800 mV
Input Impedance (nominal) 100 kilohms
Minimum Load Impedance 100V ouput: 160 ohms, 70V output: 80 ohms, 4-ohm output: 4/8 ohms
Crosstalk (all controls at "10") -70 dB at 1 kHz
Line Output Level (nominal) 1V into 10 kilohms
AC Line Voltages Available 100V 50/60 Hz, 120V 60Hz, 220V 50/60 Hz, 230V 50/60 Hz, 240V 50/60 Hz
Operating Temperature/Humidity 0 degrees C to 40 degrees C at 95% relative humidity (non-condensing)
Storage Temperature -20 degrees C to 85 degrees C