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Key Digital KD-AMP220
2-Channel Compact Digital Amplifier

Part #: KD-AMP220
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Our Price: $371.00
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Top KD-AMP220 Specifications
  • Specifications
  • I/O Connections
  • Analog Inputs: (1) 6-pin Phoenix Connector, (1) 3.5mm TRS Connector
  • Microphone Input: (1) 3-pin Phoenix Connector
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Key Digital introduces the KD-AMP220: a class-D amplifier featuring 8 Ohm speaker output. This digital audio amplifier's inputs enable microphone, line level balanced/unbalanced, and 3.5mm stereo analog audio inputs. Its outputs include a mixture of audio from the input microphone and the selected audio input. The KD-AMP220's volume is simple to control, featuring IR, RS-232, and a front panel. 

This amplifier ships complete with operating instructions, Key Digital warranty card, 2 l-type mounting ears for installation, as well as an IR remote control, power supply, and IR sensor. Key features include the following: 

  • Class D Amplification: 40-Watt @ 8ohm / 20-Watt @ 4ohm
  • Mixing: 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
  • Inputs: Microphone (3-pin balanced, condenser/dynamic), 6-pin balanced stereo, 3.5mm stereo
  • Phantom Power: 48V phantom power for integration with condenser microphones
  • Outputs: 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



  • Control (Front Panel): Push Button, Rotary Knob
  • Control (Rear Panel): RS-232 via (1) 3-pin Phoenix Connector, IR via (1) 3.5mm TRS Connector
  • Microphone 48V Phantom Power Mode Switch: (1) 2-Position Slide Switch
  • Output Signal Format Selector: (1) 3-Position Slide Switch
  • Balanced/Unbalanced Analog Audio Output: (1) 6-pin Phoenix Connector
  • Speaker Output: (1) 4-pin/5 mm Phoenix Connector
  • 24V DC Power: (1) Barrel (5.5 mm OD, 2.1 mm ID)
  • Audio Performance
  • Input Impedance: >10k
  • Output Impedance: 50 Analog Output
  • 4/8 Speaker Output
  • Maximum Rated Power Output: 40 Watts
  • Frequency Response: 120 Hz to 20 kHz
  • Common Mode Rejection Ratio (CMRR): >70 dB at 20 Hz to 20 kHz
  • Signal to Noise Ratio (SNR): 80 dB (Max)
  • Total Harmonic Distortion + Noise (THD+N): 1% at 1 kHz
  • 0.3% at 20 kHz at Nominal Level Voltage Gain: 32 dB
  • Chassis and Environmental
  • Enclosure: Painted Aluminum
  • Dimensions (W x H x D): 8.661" x 1.299" x 4.094" (LxDxH)
  • Net Weight: 1.153 Lb
  • Operating Temperature: +32 to +104 F (0 to +40 C)
  • Operating Humidity: 20% to 90%, Non-condensing
  • Storage Temperature: +14 to +140 F (-10 to +60 C)
  • Storage Humidity: 20% to 90%, Non-condensing
  • Power, ESD, and Regulatory
  • Minimum Power Consumption: 5 watts
  • Maximum Power Consumption: 45 watts
  • Power Supply Input Voltage: 100-240v AC at 50/60 Hz at 0.5 A
  • Power Supply Output Rating: 24V DC at 2.71 A
  • ESD Protection: 15kV
  • Device Regulatory: CE, FCC
  • Power Supply Regulatory: CE, FCC
  • Warranty: 3 years

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