{"product_id":"s350hs-bluetooth-power-amplifier-board-tpa3251-2-1-channel-highpower","title":"S350HS Bluetooth Power Amplifier Board TPA3251 2.1 Channel - HighPower","description":"\u003cp\u003eOur review of the S350HS Bluetooth Power Amplifier Board finds it best suited to hobbyists and DIY home audio builders who need a compact 2.1 channel module with real power headroom. The single biggest reason to buy is its use of dual \u003cstrong\u003eTPA3251\u003c\/strong\u003e amplifier chips delivering a combined continuous output capable of driving a full stereo pair plus a subwoofer, while supporting multiple inputs including Bluetooth, AUX and USB drive playback for flexible source options.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTPA3251 HIFI CHIP:\u003c\/strong\u003e Dual TPA3251 chips provide high-fidelity amplification and strong continuous power for clear, dynamic stereo and subwoofer output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide voltage input:\u003c\/strong\u003e The board accepts DC 12-38V so it can run from a range of power supplies and battery systems for flexible installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple input methods:\u003c\/strong\u003e Bluetooth, AUX and USB drive input make it easy to connect phones, TVs, and computers without extra adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrebles and bass control:\u003c\/strong\u003e Dedicated high and low frequency knobs let the listener shape tone and add bass impact for different music or movie use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection features:\u003c\/strong\u003e Built-in short-circuit, over-current, over-temperature and reverse polarity protection help keep the module and connected speakers safe under fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 2.1 form factor:\u003c\/strong\u003e A single board supports left\/right channels plus a powered subwoofer output, simplifying small home theater or desktop audio builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis amplifier board is aimed at tinkerers, DIY audio builders and small-room home theater users who want a compact, powerful 2.1 solution with tone controls and modern inputs. It works well for powering bookshelf speakers plus a powered sub or an active subwoofer when paired with an appropriate power supply.\u003c\/p\u003e\n\u003cp\u003eThose who want an out-of-the-box finished stereo receiver with remote control, integrated streaming services or factory speaker matching may prefer a completed consumer amplifier. Installers should also account for the need to supply a DC power adapter (36V 8A is a typical option) and provide adequate ventilation for continuous high-power use.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh continuous power from \u003cstrong\u003etwo TPA3251\u003c\/strong\u003e chips gives strong stereo and sub output for music and movies.\u003c\/li\u003e\n\u003cli\u003eFlexible connectivity with Bluetooth, AUX and USB drive inputs for many source devices.\u003c\/li\u003e\n\u003cli\u003eTone controls let users fine tune treble and bass for room acoustics or personal taste.\u003c\/li\u003e\n\u003cli\u003eComprehensive protection mechanisms reduce risk of damage during faults.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAs a bare amplifier board it requires an external DC supply and a cooled installation, so it is not a plug-and-play finished receiver.\u003c\/li\u003e\n\u003cli\u003ePhysical cooling and wiring best practices are needed for sustained maximum output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eChip\u003c\/td\u003e\n\u003ctd\u003eTPA3251 (dual)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e2.1 channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax output (peak)\u003c\/td\u003e\n\u003ctd\u003e220W + 220W + 350W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking voltage (DC)\u003c\/td\u003e\n\u003ctd\u003e12-38V (typical kit uses DC36V 8A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput modes\u003c\/td\u003e\n\u003ctd\u003eBluetooth, AUX, USB drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eShort-circuit, over-current, over-heat, reverse polarity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe S350HS board is a strong-value option for DIYers who need a compact, powerful \u003cstrong\u003e2.1 channel amplifier\u003c\/strong\u003e based on the TPA3251 platform; it pairs useful tone controls and multiple inputs with solid protection features. Buy it if you can provide an appropriate DC supply and enclosure with cooling - it delivers high output and flexibility at a modest cost compared with assembled receivers.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat power supply does this require?\u003c\/strong\u003e\u003cbr\u003eThe board accepts DC 12-38V; many users pair it with a 36V 8A adapter for full output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it play from a USB drive?\u003c\/strong\u003e\u003cbr\u003eYes, there is USB drive input in addition to Bluetooth and AUX for playing audio files directly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the board protected against wiring faults?\u003c\/strong\u003e\u003cbr\u003eYes, it includes short-circuit, over-current, over-temperature and anti-reverse protection to reduce risk of damage.\u003c\/p\u003e","brand":"DAJUNGUO","offers":[{"title":"Default Title","offer_id":46760680194267,"sku":"B0CX1C8DCW","price":46.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71nqfZS9l3L._SL1500_820e4cf3-4011-4784-850c-fcce7375ce5b.jpg?v=1747854695","url":"https:\/\/gearmusthave.com\/products\/s350hs-bluetooth-power-amplifier-board-tpa3251-2-1-channel-highpower","provider":"GearMustHave","version":"1.0","type":"link"}