{"product_id":"bluetooth-amplifier-board-20w-dc-5v-2-1-channel-stereo-compact-power","title":"Bluetooth Amplifier Board 20W DC 5V 2.1 Channel Stereo - Compact Power","description":"\u003cp\u003eIn this review the Bluetooth Amplifier Board 20W DC 5V 2.1 Channel Stereo proves to be a compact, no-frills upgrade for DIY audio projects and small speaker builds. It is aimed at hobbyists and tinkerers who need a simple, stable Bluetooth 5.0 input and a combined 20W output for left\/right and a sub channel. The single biggest reason to consider it is its reliable Bluetooth 5.0 connection paired with clear digital amplification that delivers usable bass and full-range sound when fed with the recommended speaker types and a proper 5V power supply.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.0:\u003c\/strong\u003e Provides a stronger and more stable wireless link for mobile phones, computers, and MP3\/MP4 players compared with older Bluetooth versions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20W total output:\u003c\/strong\u003e Delivers a combined 20W power envelope with separate channels for left\/right and a subwoofer, suitable for compact speaker systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital amplifier design:\u003c\/strong\u003e Ensures precise audio reproduction and improved dynamics over simple analog modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple power needs:\u003c\/strong\u003e Runs from a 5V DC supply (4.8-5V) and recommends 2.5A-3A or higher current for stable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker guidance:\u003c\/strong\u003e Best results with 4-5W full-range drivers for left\/right and a 10-15W woofer for the sub channel to avoid overload.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact kit:\u003c\/strong\u003e The module ships with three connection cables and weighs about 29g for easy integration into projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis module is ideal for DIY audio builders, makers adding Bluetooth to a small desktop stereo, and anyone assembling a compact multimedia speaker with a separate subwoofer. It suits projects where space and a simple 5V power source are constraints and where users prefer straightforward wiring and Bluetooth pairing.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for large rooms or high-output PA uses where significantly more power and professional speaker impedance management are required, and those expecting high-fidelity audiophile performance from stock components should consider higher-end amplifier solutions.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompact, lightweight module that is easy to mount inside small enclosures.\u003c\/li\u003e\n\u003cli\u003eBluetooth 5.0 provides dependable wireless connectivity to phones and computers.\u003c\/li\u003e\n\u003cli\u003eClear digital amplification with separate channels gives usable bass and stereo separation when paired with recommended speakers.\u003c\/li\u003e\n\u003cli\u003eLow-voltage 5V operation makes it convenient to power from common USB-style supplies with adequate current.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLimited to 20W total, so it will not drive large speakers or deliver very high SPL in big rooms.\u003c\/li\u003e\n\u003cli\u003eRequires attention to speaker selection and a robust 2.5A-3A power source for best results; performance suffers with inadequate supply or incorrect speaker loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003eDC 5V (4.8-5V), 2.5A-3A recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum power\u003c\/td\u003e\n\u003ctd\u003e20W total (10W bass + 10W sub)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker recommendation\u003c\/td\u003e\n\u003ctd\u003e4-5W full-range for L\/R; 10-15W woofer for sub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 29g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage contents\u003c\/td\u003e\n\u003ctd\u003e1 module, 3 connection cables\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Bluetooth Amplifier Board 20W DC 5V 2.1 Channel Stereo is a practical, budget-friendly module for hobbyists and compact speaker builds. It offers reliable \u003cstrong\u003eBluetooth 5.0\u003c\/strong\u003e streaming and a clean digital output when used with the recommended 5V power supply and speaker types, making it good value for small multimedia projects and desktop audio upgrades.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat power supply does this board require?\u003c\/strong\u003e\u003cbr\u003eThe module requires DC 5V (4.8-5V) and a supply capable of 2.5A-3A or more for stable operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat speaker sizes work best?\u003c\/strong\u003e\u003cbr\u003eUse 4-5W full-range speakers for the left and right channels and a 10-15W woofer for the sub channel; avoid 6 or 8 woofers as noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it stream from phones and computers?\u003c\/strong\u003e\u003cbr\u003eYes, the built-in Bluetooth 5.0 supports streaming from mobile phones, computers, MP3\/MP4 players, and similar sources.\u003c\/p\u003e","brand":"Zopsc","offers":[{"title":"Default Title","offer_id":46770010456283,"sku":"B07RFLXX2Z","price":11.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61jk5M2KttL._SL1001.jpg?v=1747854938","url":"https:\/\/gearmusthave.com\/products\/bluetooth-amplifier-board-20w-dc-5v-2-1-channel-stereo-compact-power","provider":"GearMustHave","version":"1.0","type":"link"}