{"product_id":"50w-50w-bluetooth-amplifier-board-2-0-channel-stereo-diy-speaker-amp","title":"50W+50W Bluetooth Amplifier Board 2.0 Channel Stereo - DIY Speaker Amp","description":"\u003cp\u003eIn this review the EPLZON ZK-502L 50W+50W Bluetooth amplifier board is evaluated for DIY makers and small home audio setups; the main reason to buy is its combination of solid continuous power and practical protections that make it reliable for sustained use. The board's use of the TPA3116D2 amplifier chip promises low distortion even at higher volumes and the wide DC input range makes it easy to power from common adapters. For anyone building compact wireless speakers or upgrading a small home theater, this amp balances power, heat management, and circuit protection in a compact package.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTPA3116D2 amplifier:\u003c\/strong\u003e Provides clear stereo sound with low total harmonic distortion so music remains detailed during longer listening sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W+50W output:\u003c\/strong\u003e Delivers substantial power for small to medium speakers, suitable for 4-8 ohm drivers and a variety of enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide DC input:\u003c\/strong\u003e Accepts 5V to 24V allowing use with 9V, 12V, 15V, 19V or 24V adapters for flexible installation choices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust connectors:\u003c\/strong\u003e Copper DC jack and barrier terminals withstand higher current without heating or damaging wiring, simplifying installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive protection:\u003c\/strong\u003e Built-in over temperature, short circuit, reverse connection, clipping, overvoltage and undervoltage protection keeps speakers and the board safer in real use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.0 and AUX:\u003c\/strong\u003e Password-free Bluetooth pairing up to about 49 ft and a 3.5mm wired input give simple wireless and wired connectivity options.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis board is best for DIY audio builders, hobbyists converting bookshelf or car speakers to active playback, and small venue or home theater tinkerers who need a compact amplifier with reliable protections and decent continuous power. Its printed interface labels and included parts make it friendly to a first amplifier build or upgrade.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for audiophiles seeking ultra-high-end fidelity or for large professional PA systems that need far higher continuous power and dedicated cooling. Also, users must ensure they supply an adequately rated power adapter; underpowered supplies will cause distortion and a poorer experience.\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\u003eGood continuous power per channel for small speakers with low measured distortion thanks to the TPA3116D2 chip.\u003c\/li\u003e\n\u003cli\u003eWide voltage input and common DC jack support a variety of adapters for flexible installations.\u003c\/li\u003e\n\u003cli\u003eComprehensive safety features and robust connectors reduce risk of damage during use and wiring.\u003c\/li\u003e\n\u003cli\u003eCompact size with a large heatsink keeps heat manageable during longer runs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBluetooth range and wireless reliability can be affected by nearby WiFi; placement matters for best performance.\u003c\/li\u003e\n\u003cli\u003eRequires a sufficiently rated power adapter for undistorted output, which is sold separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eZK-502L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output\u003c\/td\u003e\n\u003ctd\u003e50W + 50W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003eDC 5V - 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eBT 5.0 (up to 15M \/ ~49 ft)\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\u003eSize\u003c\/td\u003e\n\u003ctd\u003e69 x 53 x 22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver temp, short circuit, reverse, clipping, over\/under voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe EPLZON 50W+50W amplifier board is a practical, value-oriented choice for DIY speakers and small home audio projects because it pairs real continuous power with smart protections and flexible power options. Anyone building compact active speakers or retrofitting car or desktop systems will find strong performance for the price, provided they use a properly rated adapter and keep the board away from heavy WiFi interference.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I power this amplifier board?\u003c\/strong\u003e\u003cbr\u003eUse a DC adapter between 9V and 24V with sufficient current capacity for 50W+50W output; undersized adapters can cause distortion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it drive 4 ohm speakers?\u003c\/strong\u003e\u003cbr\u003eYes, the board supports 4-8 ohm speakers and is suitable for drivers rated in that range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Bluetooth require a password?\u003c\/strong\u003e\u003cbr\u003eNo, the Bluetooth 5.0 connection is password-free for quick pairing within the advertised range.\u003c\/p\u003e","brand":"EPLZON","offers":[{"title":"Default Title","offer_id":46770094440667,"sku":"B0DR2MPVV8","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/614gQsZPNjL._AC_SL1500.jpg?v=1747854241","url":"https:\/\/gearmusthave.com\/products\/50w-50w-bluetooth-amplifier-board-2-0-channel-stereo-diy-speaker-amp","provider":"GearMustHave","version":"1.0","type":"link"}