Product Information

The Crown 280A, is a high-value amplifiers for commercial and industrial audio. It provides 4-ohm and constant-voltage outputs (70V and 100V). It is part of Crowns Commercial Audio Series, which also includes mixers and mixer-amps. These low-cost units provide all necessary features in a simple building-block format. The sound system can be upgraded as a facility expands. For example, you can add more mixers for more inputs, or add more power amps (or mixer-amps) to handle more zones.Some applications include schools, hospitals, factories, restaurant/retail, houses of worship, fitness facilities, A/V boardrooms, prisons, and small offices. Typical uses are paging, background music, security and evacuation instructions.


  • The 280A has 2 inputs and dual 80W power amplifiers for two-zone systems.
  • The 180A has 1 input and one 80W power amplifier for single-zone systems.
  • Ideal for commercial and industrial use
  • Balanced Phoenix-type line inputs; touch-proofed screw-terminal speaker outputs
  • Advanced protection system includes output current limiting, DC protection, circuit breaker/fuse, and thermal protection
  • Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications


  • 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.
  • Input Sensitivity (for full output at maximum gain): 800 mV.
  • Input Impedance (nominal): 100 kilohms.
  • Minimum Load Impedance:-100V output: 160 ohms.-70V output: 80 ohms.-4-ohm output: 4/8 ohms.
  • Crosstalk (all controls at "10"): 70 dB at 1kHz.
  • Line Output Level (nominal): 1V into 10 kilohms.
  • Operating Temperature/Humidity: 0deg C to 40deg Cat 95% relative humidity (non-condensing).
  • Storage Temperature: 20deg C to 85deg C.
  • Front Panel Controls and Indicators:-Power Switch: Pushbutton on-off switch. The power switch does not affect the 24V DC auxiliary power input.-Power Indicator: Blue LED indicates power on.-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.-Clip Indicators: Red LED, one per output channel. Illuminates at threshold of audible distortion.-Master Volume Controls: One per output channel.-Detented potentiometer with knob.-Tone Controls: Bass and Treble non-detented potentiometers on each channel. Bass -+10 dB at 100 Hz, Treble -+10 dB at 10 kHz.
  • Back Panel Controls and Connectors-Reset Switch: Resets the circuit breaker that protects the power supply. -AC Power Inlet: Detachable IEC.-Auxiliary Power Input: 2-position terminal strip for 24 VDC (-+10%) backup power. Accepts up to 14 AWG terminal forks.
  • Amplifier Outputs Connectors: One per channel, 4-position terminal strip with COM (Common), 4 ohms, 70V and 100V terminals. Accepts up to 10 AWG terminal forks. Non-touch cover included.
  • Output VCA Connector: One for every two channels, 4-pin Phoenix-type connector for two VCA control lines of +10 VDC and ground. Compatible with Crown 1-VCAP and 4-VCAP modules.
  • Line Out Connector: One 3-pin balanced Phoenix type connector per output channel. Post master, pre-VCA. Level controlled by master volume control.
  • Amp Input Connector: 3-pin Phoenix-type, high-impedance balanced, one per amplifer channel.
  • Cooling: Convection cooled.
  • Protection-Current Limit Protection: Included.-Thermal Limit Protection: Over-temperature thermal cutout.-DC-Fault Load Protection: Included.
  • Included Accessories-Power cord-Detachable rack ears-Screws for rack ears-Non-touch cover for output connectors-Phoenix-type connectors-Spade lugs
  • Optional Accessories-1-VCAP remote volume control for one channel.-4-VCAP remote volume control for four channels.
  • Dimensions EIA Standard 19-inch (48.3-cm) rack mount width (EIA RS-310-B) with rack ears, 3.5-inch (8.9-cm) height and 12.2-inch (31.0-cm) depth behind the mounting surface (not including non-touch cover). 4.1 inches (10.5 cm) high including feet. 13.9 inches (35.2 cm) deep from front of knobs to back of non-touch cover.
  • Weight180A: 21.0 lb (9.5 kg)280A: 25.3 lb (11.5 kg)1160A: 25.3 lb (11.5 kg)


Availability: In Stock
Current Stock:
Width: 1.00
Height: 1.00
Depth: 1.00
GTIN: 871015001630
MPN: Crown 280A Dual 80W Commercial Power Amplifiers
SKU: 60432

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