Key Digital KD-AMP220
2-Channel Compact Digital Amplifier

Description

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

Specifications

• 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

Downloads

• Key Digital KD-AMP220 Specifications (PDF)
• Key Digital KD-AMP220 Manual (PDF)
• Key Digital KD-AMP220 Application Example (PDF)

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