PLEASE NOTE: This listing is for a open box product. Open box products will always be 100% functionally the same as retail product, but these items may have minor cosmetic or packaging flaws that prevent them from being sold as brand new.
An amplifier built for single cab classic trucks and two speaker systems, the Stereophonic 3-Channel amplifier powers your left and right speakers at 65-watts RMS per channel and sends 170-watts RMS to your subwoofer. For radios with only 2 inputs, set the Stereophonics input switch to 2 channel mode and the amplifier intelligently routes the selected inputs to all three balanced outputs. The Stereophonic is 2-ohm and 4-ohm stable and bridgeable, giving you more flexibility to build your system.
The Stereophonic Class D (digital) amplifier allows you to listen to your favorite classic hits at higher volumes with little to no distortion, thanks to its low current draw and exceptional dynamic range. High-pass and low-pass filters let you fine-tune your audio for the best listening experience, with gain and bass boost controls to help dial in the perfect amount of bass.
Features
- 3-channel amplifier
- Full-range Class D digital circuitry
- 65-watts RMS x 2 channels full-range @ 4 ohms
- 170-watts RMS x 1 channel subwoofer @ 4 ohms (229-watts RMS @ 2 ohms)
- Selectable input mode switch for 2 and 3 channel operation
- Bridgeable
- 2-ohm and 4-ohm stable
- Built-in variable low pass and high pass full-range filters
- Bass boost and gain control
- Advanced circuitry and thermal protection
- Easily connects to your RetroSound radio via RCA inputs
- Works with any aftermarket radio with low-level RCA outputs
- Dimensions: 9.4 in x 5.3 in x 1.87 in (24 cm x 13.4 cm x 4.75 cm)
Warnings:
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.
Note: Please refer to product packaging for the most up to date country of origin.

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 (cm) | 24 cm x 13.4 cm x 4.75 cm |
*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).