Key Digital KD-3.5MMEXT6 Compact Digital Amplifier and Pre-Amplifier

Key Digital KD-3.5MMEXT6 Compact Digital Amplifier and Pre-AmplifierThe KD AMP220 is a 2x20 watt Class D amplifier with an 8 speaker output ideal for installation in presentation spaces. Input connections accommodate microphone, line level balanced unbalanced, and line level 3. 5mm stereo analog audio inputs. The output is a mix of audio from the microphone input and the selected audio input. Microphone and output volume levels may be variably controlled via IR, RS 232, or the front panel, and speaker level output may

The KD-AMP220 is a 2x20-watt Class-D amplifier with an 8 Ω speaker output ideal for installation in presentation spaces. Input connections accommodate microphone, line level balanced/unbalanced, and line level 3.5mm stereo analog audio inputs. The output is a mix of audio from the microphone input and the selected audio input. Microphone and output volume levels may be variably controlled via IR, RS-232, or the front panel, and speaker level output may be set to bridge stereo or mono mode.

Features

• Class D 2 Channel Amplification: 20W PER CHANNEL @ 4ohm, 40W @ 8ohm BRIDGED
• Mixing: Output is a mix of microphone and the selected audio input
• Signal Processing of 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

• Analog Inputs: One (1) 6-pin Phoenix Connector; One (1) 3.5mm TRS Connector
• Microphone Input: One (1) 3-pin Phoenix Connector
• Control (Front Panel): Push Button, Rotary Knob
• Control (Rear Panel): RS-232 via One (1) 3-pin Phoenix Connector; IR via One (1) 3.5mm TRS Connector
• Microphone 48V Phantom Power Mode Switch: One (1) 2-Position Slide Switch
• Output Signal Format Selector: One (1) 3-Position Slide Switch
• Balanced/Unbalanced Analog Audio Output: One (1) 6-pin Phoenix Connector
• Speaker Output: One (1) 4-pin/5 mm Phoenix Connector
• 24V DC Power: One (1) Barrel (5.5 mm OD, 2.1 mm ID)
  

Audio Performance

• Input Impedance: >10k Ω
• Output Impedance: 50 Ω Analog Output; 4/8 Ω 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)L: 1% at 1 kHz; 0.3% at 20 kHz at Nominal Leve
• 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