SKU: 60234122123

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

Sale price$130.05 Regular price$144.50
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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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4.8 ★★★★★
Based on 11 reviews
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S
Verified Purchase
S. McCarty
Charlottesville, US
★★★★★ 5
Excellent fit and value - recommended buy
Size: 3+12+12+2+1 pack
I rarely write reviews, but I'm so impressed by the fit and quality of this set that I made an exception. I'd been running my eufy 11S without brushes, and have been cleaning and reusing the filters for a while now and finally decided to buy replacements. The kit came packed well with everything in order and no damage. I replaced all of the worn parts and installed the brushes and did a test run - everything worked great. I expected some fitment issues because I've seen that with other kits, but I had no issues. The fact that you get multiples of almost everything is icing on the cake. Oh, and I wasn't paid or given anything in exchange for this review, as much as that's worth now, haha. I can recommend getting this kit for your robot vacuum, if it's the right set for your model.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 6, 2025
L
Verified Purchase
LGN
Lowell, US
★★★★★ 5
Good option for an aftermarket replacement solution.
Size: 3+12+12+2+1 pack
I've been very happy with this product. I think it is a good price point for what is included. Everything was a directly compatible and everything fit as you would expect. The filter quality is good and since there are plenty in the kit I find I change the filters more often which is probably a good thing. I recommed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 3, 2025
D
Verified Purchase
deb
Natrona Heights, US
★★★★★ 5
Eufy Brushes wear out with daily use
Size: 4 Pack
These brushes help the Eufy continue to run efficiently. I have 2 dogs and run 2 Eufies daily. It is surprising how much sand, dust, gravel and hair gets vacuumed. My furniture isn't as dusty and my floor doesn't need mopping as often.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
B
Verified Purchase
Brian M.
Birmingham, US
★★★★★ 4
It works
Size: 2+12+12+2 pack
Fits as expected and it's nice to have so many replacement parts. This item is priced well.
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Reviewed in the United States on January 11, 2026
S
Verified Purchase
Suzanne
Port Orchard, US
★★★★★ 5
Fits my old eufy
Size: 3+12+12+2+1 pack
This set fits my older model eufy and has extra parts for newer models. The filters did not fit our model (our fault for not doing proper research) but the fan sweeper is awesome.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 5, 2024

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