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Stereophonic 3-channel Class D Power Amplifier

Stereophonic 3-channel Class D Power Amplifier-RetroSound
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This unique 3-channel amplifier has two 65 watt RMS full-range front channels for mids and highs – plus a mono channel with up to 229 watts (2 ohms) for a subwoofer – allowing a complete audio system to be built using a single Stereophonic amplifier. Low-level RCA inputs allow Stereophonic to work with any aftermarket radio with RCA outputs. Stereophonic is bridgeable and 4 ohm and 2 ohm stable.

Stereophonic offers exceptional dynamic range for the best possible sound reproduction from your RetroSound® audio system. The full-range channels have a high-pass crossover for use with full-range speakers. The mono channel has a low-pass crossover to fine tune the bass frequencies for use with a subwoofer. A selectable input mode allows switching between 2 and 3 channel operation.

Stereophonic also features low current draw and Class D Digital circuitry. With exceptional dynamic range and low distortion, you'll get the best possible sound from your audio system.


  • 65 watts RMS x 2 channels full-range @ 4 ohms
  • 170 watts RMS x 1 channel subwoofer @ 4 ohms (229 watts RMS @ 2 ohms)
  • Bass Boost
  • Full-range Class D digital circuitry
  • Advanced protection circuitry
  • Built-in low pass (LPF) and high pass (HPF) electronic crossovers
  • Selectable mode switch for 2 and 3 channel operation
  • Works with any aftermarket radio with low-level outputs
  • Dimensions: 12x5.25x2 inches

Optional Wiring Kit

The RetroSound® 3 Channel Amplifier Wiring Kit simplifies the installation of a sound system in your vehicle by adding all of your supplies in to one convenient kit. It includes all of the cables, wires and connectors that you need to get your 3 channel amplifier installed. The RetroSound® 3 Channel Amplifier Wiring Kit comes with: one 30 amp mini-ANL fuse and quality fuse holder, 4 meters of 8 gauge red power wire, 1.5 meters of 8 gauge black ground wire, 4 meters of 18 gauge blue turn-on wire, two sets of RCA cables, two 8 gauge ring terminals, and two 18 gauge butt connectors.

California Proposition 65 Warning: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information, see the user's manual, or browse our support page.

Full-Range Power Output @ 4 ohms 65 watts RMS x 2 channels @ 4 ohms
Subwoofer Power Output @ 4 ohms 170 watts RMS x 1 channel @ 4 ohms
Full-Range Power Output @ 2 ohms 90 watts RMS x 2 channels @ 2 ohms
Subwoofer Power Output @ 2 ohms 229 watts RMS x 1 channel @ 2 ohms
Full-Range Frequency Response 40Hz - 65KHz
Subwoofer Frequency Response 24Hz - 250Hz
Total Harmonic Distortion <0.2%
Signal to Noise Ratio (EIA rated) >95dB
Bass Boost 0-12dB @ 50Hz
Input Sensitivity 200mV - 6.0 volts
Crossover Slope 24dB
High Pass Filter (HPF) Frequency Range 40Hz - 400Hz
Low Pass Filter (LPF) Frequency Range 50Hz - 250Hz
Fuse* (fuse door on bottom of amplifier) 30 amp ATC Style
Dimensions (inches) 9.4” W x 5.3” D x 1.87” H
Dimensions (mm) 240mm W x 134mm D x 47.5mm H
*An additional 30 amp fuse (not included) must be used on the Battery (+) wire at the battery. The fuse must be placed as close as possible to the positive (+) battery terminal (within 6-8 inches away).

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