{"id":9970309333232,"title":"RetroSound® Stereophonic 3-channel Amplifier","handle":"stereophonic-3-channel-class-d-power-amplifier","description":"\u003cp\u003eAn 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3-channel amplifier\u003c\/li\u003e\n\u003cli\u003eFull-range Class D digital circuitry\u003c\/li\u003e\n\u003cli\u003e65-watts RMS x 2 channels full-range @ 4 ohms\u003c\/li\u003e\n\u003cli\u003e170-watts RMS x 1 channel subwoofer @ 4 ohms (229-watts RMS @ 2 ohms)\u003c\/li\u003e\n\u003cli\u003eSelectable input mode switch for 2 and 3 channel operation\u003c\/li\u003e\n\u003cli\u003eBridgeable\u003c\/li\u003e\n\u003cli\u003e2-ohm and 4-ohm stable\u003c\/li\u003e\n\u003cli\u003eBuilt-in variable low pass and high pass full-range filters\u003c\/li\u003e\n\u003cli\u003eBass boost and gain control\u003c\/li\u003e\n\u003cli\u003eAdvanced circuitry and thermal protection\u003c\/li\u003e\n\u003cli\u003eEasily connects to your RetroSound radio via RCA inputs\u003c\/li\u003e\n\u003cli\u003eWorks with any aftermarket radio with low-level RCA outputs\u003c\/li\u003e\n\u003cli\u003eDimensions: 9.4 in x 5.3 in x 1.87 in (24 cm x 13.4 cm x 4.75 cm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOptional Wiring Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSimplify the installation of your RetroSound® Stereophonic amplifier with this convenient wiring kit that includes everything you’ll 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, 13 ft (4 m) of 8-gauge red power wire, 5 ft (1.5 m) of 8-gauge black ground wire, 13 ft (4 m) of 18-gauge blue turn-on wire, two sets of RCA cables, two 8-gauge ring terminals, two 18-gauge butt connectors, and a hex key.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003eWarnings:\u003cbr\u003eCalifornia Proposition 65 Warning: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.\u003c\/span\u003e\u003c\/p\u003e\n\u003c!--SPLIT--\u003e \u003c!--SPLIT--\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Range Power Output @ 4 ohms\u003c\/td\u003e\n\u003ctd\u003e65 watts RMS x 2 channels @ 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Power Output @ 4 ohms\u003c\/td\u003e\n\u003ctd\u003e170 watts RMS x 1 channel @ 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Range Power Output @ 2 ohms\u003c\/td\u003e\n\u003ctd\u003e90 watts RMS x 2 channels @ 2 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Power Output @ 2 ohms\u003c\/td\u003e\n\u003ctd\u003e229 watts RMS x 1 channel @ 2 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Range Frequency Response\u003c\/td\u003e\n\u003ctd\u003e40Hz - 65KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Frequency Response\u003c\/td\u003e\n\u003ctd\u003e24Hz - 250Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Harmonic Distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal to Noise Ratio (EIA rated)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;95dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBass Boost\u003c\/td\u003e\n\u003ctd\u003e0-12dB @ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Sensitivity\u003c\/td\u003e\n\u003ctd\u003e200mV - 6.0 volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrossover Slope\u003c\/td\u003e\n\u003ctd\u003e24dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Pass Filter (HPF) Frequency Range\u003c\/td\u003e\n\u003ctd\u003e40Hz - 400Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Pass Filter (LPF) Frequency Range\u003c\/td\u003e\n\u003ctd\u003e50Hz - 250Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse* (fuse door on bottom of amplifier)\u003c\/td\u003e\n\u003ctd\u003e30 amp ATC Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (inches)\u003c\/td\u003e\n\u003ctd\u003e9.4” W x 5.3” D x 1.87” H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (cm)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 cm x 13.4 cm x 4.75 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e*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).\u003c\/p\u003e","published_at":"2026-04-04T14:15:31-07:00","created_at":"2026-04-04T14:15:31-07:00","vendor":"RetroSound","type":"Amplifiers \u0026 Subwoofers","tags":["amplifier","amplifiers","amps\u0026subs","stereo","universal products"],"price":19999,"price_min":19999,"price_max":23298,"available":true,"price_varies":true,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":49500322201840,"title":"3 Channel Wiring Kit","option1":"3 Channel Wiring Kit","option2":null,"option3":null,"sku":"STEREOPHONIC-AK-3","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"RetroSound® Stereophonic 3-channel Amplifier - 3 Channel Wiring Kit","public_title":"3 Channel Wiring Kit","options":["3 Channel Wiring Kit"],"price":23298,"weight":2722,"compare_at_price":null,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49500322234608,"title":"No Wiring Kit","option1":"No Wiring Kit","option2":null,"option3":null,"sku":"STEREOPHONIC","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"RetroSound® Stereophonic 3-channel Amplifier - No Wiring Kit","public_title":"No Wiring Kit","options":["No Wiring Kit"],"price":19999,"weight":1950,"compare_at_price":null,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC.jpg?v=1775337333","\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC-_Rear.jpg?v=1775337333","\/\/www.hitechclassics.com\/cdn\/shop\/files\/AK-3.jpg?v=1775337334"],"featured_image":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC.jpg?v=1775337333","options":["Wiring Kit"],"media":[{"alt":null,"id":44159940231408,"position":1,"preview_image":{"aspect_ratio":1.779,"height":1405,"width":2500,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC.jpg?v=1775337333"},"aspect_ratio":1.779,"height":1405,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC.jpg?v=1775337333","width":2500},{"alt":null,"id":44159940264176,"position":2,"preview_image":{"aspect_ratio":1.779,"height":1405,"width":2500,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC-_Rear.jpg?v=1775337333"},"aspect_ratio":1.779,"height":1405,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/STEREOPHONIC-_Rear.jpg?v=1775337333","width":2500},{"alt":null,"id":44159940296944,"position":3,"preview_image":{"aspect_ratio":1.508,"height":2669,"width":4025,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/AK-3.jpg?v=1775337334"},"aspect_ratio":1.508,"height":2669,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/AK-3.jpg?v=1775337334","width":4025}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eAn 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3-channel amplifier\u003c\/li\u003e\n\u003cli\u003eFull-range Class D digital circuitry\u003c\/li\u003e\n\u003cli\u003e65-watts RMS x 2 channels full-range @ 4 ohms\u003c\/li\u003e\n\u003cli\u003e170-watts RMS x 1 channel subwoofer @ 4 ohms (229-watts RMS @ 2 ohms)\u003c\/li\u003e\n\u003cli\u003eSelectable input mode switch for 2 and 3 channel operation\u003c\/li\u003e\n\u003cli\u003eBridgeable\u003c\/li\u003e\n\u003cli\u003e2-ohm and 4-ohm stable\u003c\/li\u003e\n\u003cli\u003eBuilt-in variable low pass and high pass full-range filters\u003c\/li\u003e\n\u003cli\u003eBass boost and gain control\u003c\/li\u003e\n\u003cli\u003eAdvanced circuitry and thermal protection\u003c\/li\u003e\n\u003cli\u003eEasily connects to your RetroSound radio via RCA inputs\u003c\/li\u003e\n\u003cli\u003eWorks with any aftermarket radio with low-level RCA outputs\u003c\/li\u003e\n\u003cli\u003eDimensions: 9.4 in x 5.3 in x 1.87 in (24 cm x 13.4 cm x 4.75 cm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOptional Wiring Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSimplify the installation of your RetroSound® Stereophonic amplifier with this convenient wiring kit that includes everything you’ll 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, 13 ft (4 m) of 8-gauge red power wire, 5 ft (1.5 m) of 8-gauge black ground wire, 13 ft (4 m) of 18-gauge blue turn-on wire, two sets of RCA cables, two 8-gauge ring terminals, two 18-gauge butt connectors, and a hex key.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003eWarnings:\u003cbr\u003eCalifornia Proposition 65 Warning: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.\u003c\/span\u003e\u003c\/p\u003e\n\u003c!--SPLIT--\u003e \u003c!--SPLIT--\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Range Power Output @ 4 ohms\u003c\/td\u003e\n\u003ctd\u003e65 watts RMS x 2 channels @ 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Power Output @ 4 ohms\u003c\/td\u003e\n\u003ctd\u003e170 watts RMS x 1 channel @ 4 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Range Power Output @ 2 ohms\u003c\/td\u003e\n\u003ctd\u003e90 watts RMS x 2 channels @ 2 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Power Output @ 2 ohms\u003c\/td\u003e\n\u003ctd\u003e229 watts RMS x 1 channel @ 2 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-Range Frequency Response\u003c\/td\u003e\n\u003ctd\u003e40Hz - 65KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubwoofer Frequency Response\u003c\/td\u003e\n\u003ctd\u003e24Hz - 250Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Harmonic Distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal to Noise Ratio (EIA rated)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;95dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBass Boost\u003c\/td\u003e\n\u003ctd\u003e0-12dB @ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Sensitivity\u003c\/td\u003e\n\u003ctd\u003e200mV - 6.0 volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrossover Slope\u003c\/td\u003e\n\u003ctd\u003e24dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Pass Filter (HPF) Frequency Range\u003c\/td\u003e\n\u003ctd\u003e40Hz - 400Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Pass Filter (LPF) Frequency Range\u003c\/td\u003e\n\u003ctd\u003e50Hz - 250Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuse* (fuse door on bottom of amplifier)\u003c\/td\u003e\n\u003ctd\u003e30 amp ATC Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (inches)\u003c\/td\u003e\n\u003ctd\u003e9.4” W x 5.3” D x 1.87” H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (cm)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 cm x 13.4 cm x 4.75 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e*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).\u003c\/p\u003e"}