PA D4000.4

Super-Efficient 4-Channel Mobile Audio Amplifier

3.9 out of 5 Customer Rating
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Sleek. Compact. Powerful. When install space is at a premium, but your sound system demands plenty of power to realize its full potential, Polk Audio’s super-efficient PA D4000.4 amplifier is a very cool solution.

  • Super-Efficient Class D Design
  • High-Speed MOSFET Switching power supply
  • Sleek design under 2" tall
  • Thermal, DC offset, reverse DC voltage and short circuit protection

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PA D4000.4

PA D4000.4

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This is How You Build a Really Cool Amplifier

PA D4000.4 offers an ultra-compact, minimalist design with a 4-channel configuration to drive all your speakers. Toroidal transformers help keep the amplifier’s sleek aluminum extruded design under 2" tall while ensuring plenty of clean, efficient power. Low THD’s, high signal-to-noise ratios, plus wide bandwidth frequencies, make the new PA D4000.4 Amplifier your high performance choice for clean, distortion-free sound.

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PA D4000.4
Details & Specifications


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Can this amplifier accept high level input wires from my speaker line out on the head unit? Simply cut the rca ends off of the wires or how are the connected? And what is max input voltage please. Thank you.

Asked by: centralcoaster
Hello, the amplifier cannot accept a High-Level input connection without the addition of a hi-to-low converter. Hi-To-Low converters are available third party.
Answered by: Polk Audio
Date published: 2023-11-29

Can this amplifier be mounted vertically or horizontally?

Asked by: One Eyed mike
Yes, the amplifier can be mounted vertically or horizontally.
Answered by: Polk Audio
Date published: 2023-05-31

Why was this amp discontinued? Is there any information on the manufactured date for the amp?

Asked by: Leandro Jack
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