Polk Audio PA D4000.4

€ 350

Super Efficient Class D Bridgeable 4-Channel Mobile Audio Amplifier

The PA D4000.4 amplifier is capable of bridging two full-range channels into a single full range channel with higher output power. For instance, one front and one rear channel will increase the output power from 125W per channel to 400W per channel (for a 4 ohm load). The most common hookups for the PA D4000.4 would be four full-range channels, two full-range channels and a bridged sub, or two bridged subwoofers.


  • Low THD, a high signal-to-noise ratio, plus wide bandwidth frequencies make the PA D4000.4 four-channel a superior choice for distortion-free power
  • Super-efficient class D design—Runs much cooler than conventional amps
  • High-speed MOSFET—Switching power supply
  • Toroidal transformers help keep the amplifier’s sleek design under 2-inch tall while ensuring plenty of clean, efficient power.


  • 4-channel car amplifier
  • 125 watts RMS x 4 at 4 ohms (200 watts RMS x 4 at 2 ohms)
  • 200 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
  • separate variable high-pass filters for front and rear channels (20-4000 Hz, 12 dB per octave)
  • separate variable low-pass filters for front and rear channels (50-5000 Hz, 12 dB per octave)
  • preamp inputs
  • fuse rating: 30A x 2
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier


For more information, please visit this products webpage