--- product_id: 382080504 title: "S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS)" brand: "dajunguo" price: "$108.15" currency: USD in_stock: true reviews_count: 9 category: "Dajunguo" url: https://www.desertcart.us/products/382080504-s350hs-tpa3251-bluetooth-power-amplifier-board-with-subwoofer-2-1 store_origin: US region: United States of America --- # 220W×2+350W output power Bluetooth, AUX & USB inputs Treble & bass control knobs S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) **Brand:** dajunguo **Price:** $108.15 **Availability:** ✅ In Stock ## Summary > 🎵 Elevate your sound game—because your audio deserves to be as ambitious as you are. ## Quick Answers - **What is this?** S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) by dajunguo - **How much does it cost?** $108.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/382080504-s350hs-tpa3251-bluetooth-power-amplifier-board-with-subwoofer-2-1) ## Best For - dajunguo enthusiasts ## Why This Product - Trusted dajunguo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Connectivity:** Effortlessly pair via Bluetooth or plug in through AUX and USB for ultimate device compatibility. - • **Powerhouse Performance:** Unleash crisp highs and earth-shaking bass with 220W×2 + 350W subwoofer output—feel every beat. - • **Built to Last & Protect:** Advanced multi-layer protection guards against short-circuit, over-current, and overheating for worry-free jams. - • **Plug & Play Versatility:** Compact, surface-mount design fits anywhere—perfect for pros upgrading home studios, trucks, or creative setups. - • **Tailored Sound Experience:** Customize your audio with dedicated treble and bass controls—because one knob just isn’t enough. ## Overview The S350HS TPA3251 Bluetooth Power Amplifier Board delivers a robust 2.1 channel output with 220W per stereo channel plus a 350W subwoofer channel, supporting a wide 12-38V input range. Featuring Bluetooth, AUX, and USB inputs, it offers versatile connectivity for all your devices. With dedicated treble and bass controls, it lets you fine-tune your sound profile. Built-in protections ensure safe, reliable operation, making it an ideal upgrade for professionals seeking powerful, customizable audio performance in a compact form. ## Description Product description 2.1 Channels Power Amplifier The S350HS Bluetooth amplifier board is engineered to deliver exceptional sound quality. With two TPA3251 power amplifier chips, it boasts an impressive power output of up to 220W*2+350W for continuous power(peak power output). Whether you're enjoying music or watching movies, this amplifier ensures your audio experience is immersive. Multiple Input Mode Enjoy flexibility in your audio sources with multiple input methods. This amplifier board supports Bluetooth input, AUX input for traditional audio sources, and USB Flash disk playback when format as FAT32. With this diverse input option, you can easily connect to various devices such as mobile phones, televisions, laptops, MP3 players, etc., making enjoying music easier. Customizable Bluetooth Settings The S350HS offers a unique feature - the ability to customize Bluetooth settings via a mobile app. Set a unique Bluetooth name and password to prevent accidental connections by neighbors or confusion with other devices. Enjoy the convenience of personalized Bluetooth settings without compromising security. Comparison Table of Input Voltage and Output Power The above output power is peak power, not rated power. The peak output power data comes from new product data provided by Texas Instruments in the United States. This data is obtained in a specific, ideal state with TDH=10% 1kHz. According to the above table, the higher the input voltage, the higher the output power; The lower the speaker impedance, the higher the output power. If you want to achieve good power output, a power adapter of 24V 36V/5-10A or above is a recommended choice. Multifunctional main knob design You can use different commands by pressing the knob several times, such as mode switching, APP activation, etc 1.Click:Play / Pause 2.Two Clicks:Next Song 3.Three Clicks:Previous Song 4.Four Clicks:Switch Mode 5.Five Clicks:Factory Reset 6.Long press:Power on/Standby Review: Would buy again - Powered off of my 24v lifepo4 battery in my semi truck. Pushes the highs at 2ohm and a kicker comp 10 150w rms 4ohm real nice. Sub is in passenger floor in front of seat, can feel and hear the bass very nicely. I will probably upgrade to the metal encased version in due time, but works good for me. Review: No complaints - Worked great till I upgraded my amp ## Features - 【TPA3251 HIFI CHIP】The TPA3251 Chip Solution: Stereo 2.1channel Output to Ensure Continuous Serial High-power Operation, Wide Voltage Input DC: 12-38V,This power amplifier board uses two TPA3251 high-fidelity maximum output power up to 220W*2+350W. - 【MULTIPLE INPUT METHOD】The S350HS has multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use. - 【TREBLE & BASS CONTROL】If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the S350HS power amplifier board, you can make the sound more layered and make the bass more shocking. - 【PROTECTION FUNCTION】S350HS Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage - 【7 * 24 Hours After-sales Service】 Paying Attention To Customer Experience And Satisfying Customers Is Our Service Tenet. If You Have Any Questions About The Product, or The Product Has Quality Problems, Please Contact Us At Any Time, We Will Give You A 100% Satisfactory Answer ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CHF6MML7 | | Best Sellers Rank | #26,867 in Electronics ( See Top 100 in Electronics ) #138 in Audio Component Amplifiers | | Brand Name | DAJUNGUO | | Customer Reviews | 4.3 out of 5 stars 186 Reviews | | Global Trade Identification Number | 00194852393363 | | Included Components | amplifier board | | Item Dimensions | 5.9 x 5.15 x 1.02 inches | | Item Weight | 327 Grams | | Item dimensions L x W x H | 5.9 x 5.15 x 1.02 inches | | Manufacturer | DAJUNGUO | | Material Type | metal, plastic | | Maximum Supply Voltage | 36 Volts (DC) | | Minimum Supply Voltage | 12 Volts (DC) | | Model | S350HS | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Output Power | 220220350 Watts | | Package Type Name | unassembled kit | | Part Number | ZK-HT21 | | Specification Met | CE | | UPC | 194852393714 194852393363 | | Voltage | 15 Volts (DC) | ## Product Details - **Item dimensions L x W x H:** 5.9 x 5.15 x 1.02 inches - **Manufacturer:** DAJUNGUO - **Maximum Supply Voltage:** 36 Volts (DC) - **Minimum Supply Voltage:** 12 Volts (DC) - **Voltage:** 15 Volts (DC) ## Images ![S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) - Image 1](https://m.media-amazon.com/images/I/71nqfZS9l3L.jpg) ![S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) - Image 2](https://m.media-amazon.com/images/I/81CQ4In1euL.jpg) ![S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) - Image 3](https://m.media-amazon.com/images/I/81zyipBklsL.jpg) ![S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) - Image 4](https://m.media-amazon.com/images/I/81JgTUzoJgL.jpg) ![S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black (S350HS) - Image 5](https://m.media-amazon.com/images/I/91hfeCe540L.jpg) ## Available Options This product comes in different **Model** options. ## Questions & Answers **Q: Is the subwoofer frequency knob an adjustable low-pass filter?** A: Yes frequency and gain aka volume separate from volume for everything..aswel as a slider volume so you can set the max anyone can turn the volume up..so they don't blow .. **Q: If I was hook this up in my vehicle with about 13.6vdc-14.1vdc and 50-60amps then will it work or blow? If it’ll work then how many watts/channel???** A: I had the slightly weaker version setup in my vehicle. I wired the front speakers to the two speaker channels, and ended up wiring my rear 6x9s in series and wired those to the subwoofer channel. You must be careful with impedances if you do this to make sure you don't blow your speakers. But doing this gave me very good sound for not having an actual subwoofer. A dedicated, high power amplifier will have way more bump for an actual subwoofer, however, if you're ok with the idea of using your rear fill as a stand-in subwoofer, wire it up how I described and it'll sound pretty good. I also used a DC-DC buck converter to step my vehicle's 12-14V DC up to the optimal power level for the amplifier. They're all over amazon just search the input power by the output power and the amp rating and you'll be good to go. **Q: Fuente recomendable para este equipo?** A: ¿Quieres decir qué tipo de energía necesita? La fuente de alimentación de 12V-36V / (5-15A) DC puede impulsarlo. Si desea obtener una entrada de alta potencia, primero debe aumentar el voltaje de entrada o reducir la impedancia del altavoz. **Q: To run a 4ohm sub and 4 ohm speakers what ah should I get for the 36v power supply?** A: This need depends on your needs, if your speaker power is relatively large, then it is recommended to use 36V. If the power of the speaker is not very large, the 24V DC power supply can also drive your speaker. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Would buy again *by J***R on September 2, 2025* Powered off of my 24v lifepo4 battery in my semi truck. Pushes the highs at 2ohm and a kicker comp 10 150w rms 4ohm real nice. Sub is in passenger floor in front of seat, can feel and hear the bass very nicely. I will probably upgrade to the metal encased version in due time, but works good for me. ### ⭐⭐⭐⭐⭐ No complaints *by C***Y on April 14, 2026* Worked great till I upgraded my amp ### ⭐⭐⭐⭐ Surprising Power, Tiny Package, Bluetooth No Bueno *by D***S on April 19, 2025* Cons: Don't use the bluetooth features, you need an app and the functionality is absolutely limited. It's barely usable to control volume. Pros: Ignoring the lackluster BT connectivity capability, this amp packs some serious power. I'm using a pair of JVC 20W bookshelf monitors, and a pair of 400w JBL 10" subwoofers. Coupled with a 36V 30A power supply, this little amp has had absolutely no problem making my walls shake. I don't need to turn it up more than a few clicks, and it's loud enough to hear across the whole apartment. It's so small that all of my other electronics in the same cabinet dwarf it by far, with the humble Wii being about 3-4x bigger and it's the smallest console in the cabinet. That lacking BT connectivity knocks off a star. Otherwise it is a decent product. ## Frequently Bought Together - TDA7498E Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 160W×2+220W, 15V-36V Audio Power Amplifier Module with Treble and Bass Control - ALITOVE 24V Power Supply DC 24 Volt 5A AC Adapter 100-240V AC/DC Adapter Transformer Compatible 5 Amp 4A 3A 2.7A 2.5A 2A with 5.5 * 2.5mm/2.1mm Tip for LED Strip CCTV Camera Printer LCD Monitor - Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control for DIY Bluetooth Audio and Store Home Theater --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/382080504-s350hs-tpa3251-bluetooth-power-amplifier-board-with-subwoofer-2-1](https://www.desertcart.us/products/382080504-s350hs-tpa3251-bluetooth-power-amplifier-board-with-subwoofer-2-1) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-12*