SKU: 60234122123

Key Digital KD-AMP220 Compact Digital Amplifier and Pre-Amplifier

Sale price$130.05 Regular price$144.50
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Ships within 48 hours · Estimated delivery Sep 1 - Sep 6

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Description

Key Digital KD-AMP220 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
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 60234122123

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4.1 ★★★★★
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Product Reviews
D
Verified Purchase
D. Wetherbee
Draper, US
★★★★★ 5
Nice Everyday Watch
Color: Silver-tone/White
The watchband was a bit too big and no one seems to be able to take out a link. Other than that, it's an excellent inexpensive everyday watch
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2026
F
Verified Purchase
Fred Turek
Houston, US
★★★★★ 1
Great watch, terrible band. Had two of these, both bands fell apart within weeks.
Color: Silver-tone/White, Color: Silver-tone/White
I had one just like this before. Great watch except they made one very bad change in the band which makes them fall apart within weeks. They don't tell time if you have to throw them in the garbage because of bands that fell apart. I like it, a nice clean dial, works fine, and you can make it light up to check the time in the dark. But some idiot made a terrible design change in the band. The center 1/3" of band is not twistable and falls apart easily. I've had two of these; both fell apart within weeks. The previous similar one that I owned without this design defect lasted me many years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2024
R
Verified Purchase
Rhaelee BooHer
Bozeman, US
★★★★★ 5
its a simple watch
Color: Silver-tone/White
This was a gift for my 80 Y/O father, the numbers are easy to read and the date (Numbered day only) will have to be adjusted if the month is 30 days instead of 31. The wristband fit perfectly, so there was no adjustment of links. He has had it for a month now and forgot to take it off when he entered the shower, still works, but wont let that happen again. If it lasts a year I will be happy, it wasn't expensive for a Timex and the silver color looked like silver.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 3, 2024
J
Verified Purchase
Jesse Byock, Jules William Press
Houston, US
★★★★★ 5
Watch face in the dark
Color: Silver-tone/White
The indigo really works!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2025
E
Verified Purchase
ESPADRILLE COMFORT
Draper, US
★★★★★ 3
Time work watch
Color: Silver-tone/White
Inexpensive work watch, they last forever, the only complaint I have is that the band broke and I couldn’t find a replacement band, so I had it repaired instead , the watch works great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2024

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