{"product_id":"300w-2-1-channel-subwoofer-amplifier-board","title":"300W 2.1 Channel Subwoofer Power Amplifier Board – 2×100W + 120W DIY Audio Amp","description":"\u003cdiv\u003e\n\u003cspan size=\"4\" style=\"font-family: Arial; font-size: large;\"\u003e\u003cmeta http-equiv=\"Content-Type\" content=\"text\/html; charset=utf-8\"\u003e\u003c\/span\u003e\n\u003ch3 dir=\"auto\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThis high-power \u003cstrong\u003e2.1 channel audio amplifier board\u003c\/strong\u003e is designed for DIY stereo and subwoofer systems. It provides separate left and right stereo channels together with a dedicated BTL subwoofer channel, making it suitable for DIY speaker systems, powered subwoofers, home audio projects, and custom amplifier builds.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe circuit uses \u003cstrong\u003esix power amplifier transistors\u003c\/strong\u003e: four for the left and right stereo channels and two connected in a BTL configuration for the subwoofer channel. The board incorporates 1% metal-film resistors, large filter capacitors, an aluminum heatsink, and an active cooling fan for reliable operation.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2.1-channel stereo + subwoofer amplifier design\u003c\/li\u003e\n\u003cli\u003eMaximum rated output: \u003cstrong\u003e100W × 2 stereo + 120W × 1 subwoofer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSix power amplifier transistors\u003c\/li\u003e\n\u003cli\u003eDedicated BTL subwoofer channel\u003c\/li\u003e\n\u003cli\u003eFour independent adjustment controls\u003c\/li\u003e\n\u003cli\u003eTreble, bass, subwoofer volume, and master volume adjustment\u003c\/li\u003e\n\u003cli\u003eLarge aluminum heatsink\u003c\/li\u003e\n\u003cli\u003eIntegrated cooling fan\u003c\/li\u003e\n\u003cli\u003e1% metal-film resistors\u003c\/li\u003e\n\u003cli\u003eLarge filter capacitors\u003c\/li\u003e\n\u003cli\u003eSuitable for \u003cstrong\u003e4–16Ω\u003c\/strong\u003e speaker loads\u003c\/li\u003e\n\u003cli\u003eDesigned for DIY audio, speaker, and subwoofer projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eAmplifier Type:\u003c\/strong\u003e 2.1 Channel Stereo + Subwoofer Power Amplifier Board\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eMaximum Rated Output:\u003c\/strong\u003e\u003cbr\u003eLeft Channel: 100W\u003cbr\u003eRight Channel: 100W\u003cbr\u003eSubwoofer Channel: 120W\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 4–16Ω\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePower Input:\u003c\/strong\u003e Dual AC 18–22V\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eRecommended Power Input:\u003c\/strong\u003e Dual AC 22V\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNumber of Power Amplifier Transistors:\u003c\/strong\u003e 6\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eControls:\u003c\/strong\u003e Treble, Bass, Subwoofer Volume, Master Volume\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approx. 14.3 × 13.2 × 5.9 cm\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eCooling:\u003c\/strong\u003e Aluminum heatsink with cooling fan\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eControl Functions\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe four front potentiometers, from left to right, control:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eTreble\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBass\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSubwoofer Volume\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMaster Volume\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp dir=\"auto\"\u003eThis allows convenient adjustment of both the stereo channels and subwoofer output for different speaker configurations and listening preferences.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eConnections\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe amplifier board provides connections for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLeft-channel speaker\u003c\/li\u003e\n\u003cli\u003eRight-channel speaker\u003c\/li\u003e\n\u003cli\u003eSubwoofer\u003c\/li\u003e\n\u003cli\u003eStereo audio input\u003c\/li\u003e\n\u003cli\u003eDual AC power input\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eThe rear speaker terminals are separated for the \u003cstrong\u003eleft speaker, right speaker, and subwoofer\u003c\/strong\u003e, while the RCA connectors provide the audio signal input.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eApplications\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eSuitable for a variety of DIY and replacement audio applications, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDIY 2.1 speaker systems\u003c\/li\u003e\n\u003cli\u003eDIY subwoofer systems\u003c\/li\u003e\n\u003cli\u003eHome audio projects\u003c\/li\u003e\n\u003cli\u003eCustom stereo amplifiers\u003c\/li\u003e\n\u003cli\u003ePowered speaker projects\u003c\/li\u003e\n\u003cli\u003eSpeaker repair and modification\u003c\/li\u003e\n\u003cli\u003eElectronics and audio hobby projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"LR5Y_W_content markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch3 dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003ePackage Includes\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e1 × 300W 2.1 Channel Subwoofer Power Amplifier Board\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 × Control Knobs\u003c\/strong\u003e (plastic or aluminum, depending on selected option)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × 3.5mm to Dual RCA Audio Cable\u003c\/strong\u003e (included only with cable options)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA power transformer, speakers, enclosure, and other external accessories are \u003cstrong\u003enot included\u003c\/strong\u003e unless otherwise specified.\u003c\/li\u003e\n\u003cli\u003eThis board requires a \u003cstrong\u003edual AC power supply\u003c\/strong\u003e. Do not connect it directly to household mains power.\u003c\/li\u003e\n\u003cli\u003ePlease verify the power supply voltage, speaker impedance, and wiring before powering on the amplifier.\u003c\/li\u003e\n\u003cli\u003eMaximum output figures are rated specifications. Actual output power depends on the power supply, speaker impedance, load, cooling, input signal, and operating conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!--[Datacaciques code end]--\u003e\n\u003cstyle type=\"text\/css\"\u003e.dc_tracker_img{display:none;}.dc_tracker_img:last-of-type{display:block;}p:empty+hr{display:none;}hr+span.ebay,hr+*\u003espan.ebay{display:none;}\u003c\/style\u003e","brand":"Lilly Electronics","offers":[{"title":"Plastic Knobs","offer_id":40923363475585,"sku":"ABC-300W-2.1-3CH","price":33.0,"currency_code":"CAD","in_stock":true},{"title":"Aluminum Knobs","offer_id":40923363508353,"sku":"ABC-300W-2.1-3CH-AL","price":35.0,"currency_code":"CAD","in_stock":true},{"title":"Plastic Knobs + 3.5mm to Dual RCA Audio Cable","offer_id":40923363541121,"sku":"ABC-300W-2.1-3CH+CAB","price":35.0,"currency_code":"CAD","in_stock":true},{"title":"Aluminum Knobs + 3.5mm to Dual RCA Audio Cable","offer_id":40923363573889,"sku":"ABC-300W-2.1-3CH-AL+CAB","price":37.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/8647\/4369\/files\/50997ce29803ddc7e7ffc55a149df18b.jpg?v=1775022433","url":"https:\/\/www.lilly-electronics.com\/products\/300w-2-1-channel-subwoofer-amplifier-board","provider":"Lilly Electronics","version":"1.0","type":"link"}