www.denonpro.comPHONE: [401] 658.3131April 24, 2024


Zone Amplifier with Microphone Input

Key Features:

  • Class D 100W mono amplifier
  • Trim one-half rackspace height - rackmountable or stand-alone
  • Removable feet and option to mount two units together in a 1RU space
  • Paging microphone input with gain control
  • Tone and master volume controls
  • RCA inputs (L/R stereo inputs summed to MONO)
  • 3.5mm (1/8”) AUX input
  • 70V/100V/4Ω Euroblock output


If you need a compact, high-powered amplifier that sums stereo signals into a mono output for paging, P.A. announcements and background music applications, the Denon Professional DN-280 is the ideal solution. With a space-saving, one-half rack space profile, the DN-280 features a microphone input for paging, a front panel 3.5mm (1⁄8-inch) AUX input and stereo analog inputs (summed to MONO) for signals from external playback devices such as an iPhone or stereo tuner.

The amplifier handles a 4Ω load or 70V/100V speaker runs, perfect for multiple speaker setups in small retail stores or doctor’s offices. A cool-running, powerful Class D amplifier delivers 100 watts with <0.1% THD and an outstanding Signal-to-Noise Ratio of >95dB, ensuring extremely clean performance under all conditions. The DN-280 has built-in short circuit protection and front-panel LED indicators for signal present, clipping status and thermal interruption.


  • Total Harmonic Distortion:
    • <0.1% (A-weighted)

  • Frequency Response:
    • 100Hz – 15kHz (+0/-3dBv)

  • Signal-to-Noise Ratio:
    • >95dB (A-weighted)

  • Damping Factor:
    • >200 (1k 8Ω)

  • Output Power:
    • 60W

  • Connectors
    • (1) Euroblock channel output
    • (1) Dual RCA input
    • (1) XLR / TRS 1/4” (6.35mm) combination input
    • (1) TRS 1⁄8” (3.5mm) auxiliary inpu

  • Input Sensitivity
    • Dual RCA input:
      • 0+/-1dBv

    • Auxiliary input:
      • -10+/-1dBv

    • Combination input:
      • -30+/-1dBv

    • Input Impedance:
      • 20kΩ balanced or 10kΩ unbalance

  • Power
    • 100V ~, 50/60Hz, 100W
    • 110–120V ~, 50/60Hz, 100W
    • 220–240V ~, 50/60Hz, 100W
    • Voltage Gain:
      • 40+0/-1dB (100V)

  • Dimensions (width x depth x height):
    • 7.9” x 10.7” x 1.7” (200 x 273 x 43mm)

  • Weight:
    • 5.3 lbs. (2.4kg)