{"product_id":"bluetooth-amplifier-board-4-2-50wx2-stereo-receiver-compact-high","title":"Bluetooth Amplifier Board 4.2 50Wx2 Stereo Receiver - Compact High","description":"\u003cp\u003eOur review of the Bluetooth Amplifier Board 4.2 focuses on hobbyists and DIY audio builders who need a compact, high-efficiency stereo amp module. The bottom line: this finished board delivers clear, powerful two-channel sound from DC12-24V supplies, with a flexible Bluetooth 4.2 receiver and tritone tone controls that make it easy to tailor bass, midrange and treble without extra gear. It is best for projects where space, efficiency and straightforward wiring matter, and it stands out for using a TI TPA3116D2 core that supports up to 50W per channel under appropriate conditions.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual channel output:\u003c\/strong\u003e The board uses the TPA3116D2 chip to provide reliable stereo amplification up to 50W per channel at higher voltages, giving strong power for bookshelf or DIY speaker cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 4.2 receiver:\u003c\/strong\u003e Built-in wireless reception simplifies hookup to phones or tablets with a reception range beyond 8m, removing the need for a separate receiver.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide operating voltage:\u003c\/strong\u003e Runs from DC12-24V so it can be powered by laptop-style switching supplies, car 12V systems, or suitable rechargeable battery packs for portable setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTritone and volume control:\u003c\/strong\u003e Dedicated bass, midrange and treble potentiometers plus a volume switch let users shape tone and switch between Bluetooth and external source input without extra components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh efficiency:\u003c\/strong\u003e The Class D design claims around 90% efficiency, which reduces heat and makes the board well suited to enclosed installations or battery use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReady to use:\u003c\/strong\u003e The amplifier arrives soldered and tested with mounting studs, nuts and washers so most users can connect speakers and power and start listening quickly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis module is ideal for electronics hobbyists, custom speaker builders and car audio tinkerers who want a compact, efficient stereo amplifier with integrated Bluetooth and tone controls. It works well as the heart of a small desktop system, compact home theater surround channels, or a DIY powered speaker project.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include buyers who need a finished consumer product with enclosure, remote control, or advanced streaming features; this board is a component-level solution that expects basic DIY wiring and mounting skills.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh power density from the TPA3116D2 provides up to 50W per channel at suitable voltages for substantial volume and headroom.\u003c\/li\u003e\n\u003cli\u003eIntegrated Bluetooth 4.2 and \u0026gt;8m reception distance make wireless playback straightforward for most rooms.\u003c\/li\u003e\n\u003cli\u003eTritone controls and a simple input switch give on-board tone shaping and flexible input selection without extra gear.\u003c\/li\u003e\n\u003cli\u003eHigh efficiency design reduces heat and power draw, useful for battery or cramped installations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAs a bare amplifier board it lacks an enclosure, remote or advanced user interface, so extra work is required for polished installations.\u003c\/li\u003e\n\u003cli\u003ePower and speaker wiring must be correct for best output; the board assumes the user supplies an appropriate switching power supply or battery.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier chip\u003c\/td\u003e\n\u003ctd\u003eTI TPA3116D2 digital amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003eUp to 50W x 2 (varies by voltage and speaker impedance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\n\u003ctd\u003eDC 12-24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth version\u003c\/td\u003e\n\u003ctd\u003e4.2 (reception distance \u0026gt; 8m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e20Hz-20KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker impedance\u003c\/td\u003e\n\u003ctd\u003e4-8 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003eBoard, 4 studs, 4 nuts, 4 washers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Bluetooth Amplifier Board 4.2 is a practical, value-driven module for DIY audio builds and compact installations that need wireless input and straightforward tone control. It pairs strong Class D efficiency with flexible 12-24V power options and on-board tritone controls, making it a solid pick for anyone comfortable mounting and wiring a component-level amp.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this board run from a car 12V supply?\u003c\/strong\u003e\u003cbr\u003eYes, it runs from DC12-24V, so a stable car 12V source or a suitable switching supply is acceptable as long as wiring and ground are correct.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do you switch between Bluetooth and an external source?\u003c\/strong\u003e\u003cbr\u003eThe volume potentiometer has a push switch that toggles the board between Bluetooth mode and the external sound input when Bluetooth is not connected.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat speakers work best?\u003c\/strong\u003e\u003cbr\u003eUse 4-8 ohm speakers; power output varies by voltage and impedance, so choose speakers that match your intended power and enclosure for best results.\u003c\/p\u003e","brand":"Yoidesu","offers":[{"title":"Default Title","offer_id":46760838758619,"sku":"B0B6VS7XZQ","price":14.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/712VsO1L1sL._SL1500.jpg?v=1747854765","url":"https:\/\/gearmusthave.com\/products\/bluetooth-amplifier-board-4-2-50wx2-stereo-receiver-compact-high","provider":"GearMustHave","version":"1.0","type":"link"}