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Key Digital® Compact Digital Audio Amplifier

Model #: KD-AMP220
Key Digital
At a Glance
Key Digital® Compact Digital Audio Amplifier with two channels and 80db signal to noise ratio
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$99,999.00Save $NaN

Get to know this product.

Class D 2 Channel Amplification

  • 20W per channel @ 4ohm, 40W @ 8ohm bridged


  • Output is a mix of microphone and the selected audio input

Signal Processing

  • Variable volume level set for each input
  • Variable volume, bass, and treble for output


  • Microphone (3-pin balanced, condenser/dynamic), 6-pin balanced stereo, 3.5mm stereo

Phantom Power

  • 48V phantom power for integration with condenser microphones


  • Pre-amp line level (6-pin balanced), speaker level

Speaker Level Output

  • Bridge, stereo, or mono modes selectable
  • Noise gate for consistent audio levels, prevention of ambient noise


  • Front panel, RS-232, IR with external IR Sensor (included)


  • Frequency Response: 20Hz – 20KHz
  • Signal to Noise Ratio: <80dB
  • Total Harmonic Distortion: <1% @ 1KHZ, < 0.3% @ 20Khz
  • Input Impedance:
  • Mic: 35? with 48V phantom power applied, 10K ? without
  • Line: >10K ?
  • Output Impedance:
  • Speaker: 4? – 8?
  • Line: 50?
Useful Documents


Signal to Noise Ratio:80db

Misc. Specs

Depth (in.)3.42
Height (in.)1.3
Width (in.)4.84
Manufacturer Warranty3 Year
Watts per Channel (Watts)20; 40
WarningProposition 65 Warning for California Residents