{"product_id":"dajunguo-s350hs-tpa3251-2-1-bluetooth-power-amplifier","title":"DAJUNGUO S350HS TPA3251 2.1 Bluetooth Power Amplifier","description":"\u003cp\u003e\u003cstrong\u003eDAJUNGUO S350HS is a compact 2.1-channel Bluetooth power amplifier board built on TPA3251 chips, delivering up to 220W per satellite channel plus 350W to a subwoofer for powerful, tunable audio systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe S350HS amplifier module combines modern Class-D TPA3251 amplification, flexible inputs, and tone controls into a durable black PCB designed for DIY audio projects, home theater upgrades, and custom speaker systems. It accepts a wide DC supply (12V–38V), supports Bluetooth streaming, AUX and USB drive playback, and includes protective circuitry for reliable operation in demanding setups.\u003c\/p\u003e\n\n\u003ch3\u003eHow much power can this amplifier actually deliver?\u003c\/h3\u003e\n\u003cp\u003eThe S350HS uses two TPA3251 amplifiers to produce stereo satellite outputs and one channel for a powered subwoofer. Peak-rated outputs are 220W for each left and right satellite plus 350W for the low-frequency channel when supplied within the recommended voltage and load conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSatellite channels: up to 220W each using TPA3251 class-D outputs\u003c\/li\u003e\n  \u003cli\u003eSubwoofer channel: up to 350W for deep bass impact\u003c\/li\u003e\n  \u003cli\u003eWide DC input: 12V to 38V to suit portable or bench power supplies\u003c\/li\u003e\n  \u003cli\u003eWorks best with properly matched speaker impedances for sustained power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat inputs and connectivity does the board support?\u003c\/h3\u003e\n\u003cp\u003eS350HS offers three common ways to feed audio so you can connect phones, TVs, PCs or USB media quickly. Bluetooth handles wireless streaming, RCA\/AUX accepts line-level sources, and a USB drive input plays stored audio files directly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBluetooth for smartphone and tablet streaming\u003c\/li\u003e\n  \u003cli\u003eAUX\/RCA line-in for TVs, DACs and mixers\u003c\/li\u003e\n  \u003cli\u003eUSB drive playback for standalone music files\u003c\/li\u003e\n  \u003cli\u003eSimple front-panel switching between inputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I shape the sound to match my room and speakers?\u003c\/h3\u003e\n\u003cp\u003eYes. Unlike simple single-knob amps, the S350HS provides separate treble and bass controls so you can fine-tune tonal balance and emphasize clarity or low-end punch as needed. These analog controls add flexibility for different listening environments and content types.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdjustable treble knob for clearer highs and vocals\u003c\/li\u003e\n  \u003cli\u003eAdjustable bass knob to increase subwoofer impact\u003c\/li\u003e\n  \u003cli\u003eHelps tailor sound for small rooms, parties, or studio monitoring\u003c\/li\u003e\n  \u003cli\u003eUseful for compensating speaker coloration or room acoustics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety and reliability features are built in?\u003c\/h3\u003e\n\u003cp\u003eThe board includes several protection mechanisms to prevent damage from common faults and ensure longer component life in continuous-use scenarios. If a fault is detected, the module will report and limit operation to protect itself and connected speakers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eShort-circuit protection to prevent speaker or wiring faults\u003c\/li\u003e\n  \u003cli\u003eOver-current and over-temperature safeguards for sustained use\u003c\/li\u003e\n  \u003cli\u003eAnti-reverse polarity protection on DC input\u003c\/li\u003e\n  \u003cli\u003eOnboard monitoring that signals fault conditions to protect the amp\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The DAJUNGUO S350HS is aimed at hobbyists, sound installers, and DIY home theater builders who need a high-power, compact amplifier board with wireless streaming and tone shaping. It suits garage speakers, powered subwoofer demos, compact PA setups, and anyone upgrading passive speakers with a modern Class-D solution—provided you match power supply and speaker impedance to the amp's ratings. The product also includes 24\/7 after-sales support for troubleshooting and warranty concerns, making it a practical choice for first-time electronics integrators and experienced audio tinkerers alike.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What power supply voltage does the S350HS need?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use a DC supply between 12V and 38V; choose current capacity based on speaker load and desired output.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the board support Bluetooth streaming?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it supports Bluetooth for wireless audio plus AUX and USB drive inputs for wired or standalone playback.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DAJUNGUO","offers":[{"title":"Default Title","offer_id":48413392240797,"sku":"B0CHF6MML7","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/dajunguo-s350hs-front-panel.jpg?v=1781262949","url":"https:\/\/nexoltic.com\/products\/dajunguo-s350hs-tpa3251-2-1-bluetooth-power-amplifier","provider":"Nexoltic","version":"1.0","type":"link"}