{"product_id":"zk-502t-50w-2-0-channel-bluetooth-amp-board-high-fidelity-diy-audio","title":"ZK-502T 50W 2.0 Channel Bluetooth Amp Board - High-Fidelity DIY Audio","description":"\u003cp\u003eIn this review of the ZK-502T amplifier board the bottom line is simple: this is a compact, affordable way to add genuine HiFi power to a DIY speaker project or small home audio setup. The review finds the board most compelling for hobbyists and tinkerers because it combines the TPA3116D2 PurePath amplifier chip, dual 50W outputs, and both Bluetooth 5.0 and AUX inputs in a single, heat-sinked PCB. That mix delivers clean, low-distortion sound and flexible powering from 12V to 24V, making it a practical upgrade for 4-8 ohm speakers without requiring complex wiring or multiple modules.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTPA3116D2 HiFi chip:\u003c\/strong\u003e Delivers low distortion and high resolution so music is clear and detailed even at higher volumes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W per channel:\u003c\/strong\u003e Each left and right channel supplies up to 50W, providing enough output for medium-sized rooms and bookshelf speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12V-24V input range:\u003c\/strong\u003e Flexible power options let you run the board from 12V, 19V or 24V supplies to match available adapters or batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.0 and AUX inputs:\u003c\/strong\u003e Dual input modes make it easy to use wireless streaming or a wired source like a TV, phone, or computer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive protection:\u003c\/strong\u003e Built-in over-voltage, under-voltage, over-temperature, short-circuit and reverse connection protection safeguard the board and connected speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge heat sink:\u003c\/strong\u003e The sizable heatsink helps the amplifier sustain higher power output without thermal throttling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ZK-502T is aimed at DIY audio enthusiasts building custom bookshelf speakers, small powered monitors, or garage and workshop systems who need a compact amp board with solid power headroom and modern Bluetooth connectivity. Its TPA3116D2 chip and protection features make it a strong choice for hobbyists who value sound clarity and reliable operation.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include buyers seeking built-in tone controls beyond basic treble and bass, full-featured home theater receivers with surround processing, or ultra-high-power PA systems; this board is optimized for 2.0 stereo use with 4-8 ohm speakers and modest room sizes.\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\u003eClean, high-fidelity output thanks to the original TPA3116D2 PurePath chip.\u003c\/li\u003e\n\u003cli\u003eFlexible powering from 12V to 24V makes placement and power sourcing easy.\u003c\/li\u003e\n\u003cli\u003eBoth Bluetooth 5.0 and AUX let the board work with nearly any source device.\u003c\/li\u003e\n\u003cli\u003eBuilt-in protection and a large heat sink improve reliability during extended use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot a complete enclosure solution - installation, wiring and a suitable power supply are required for finished speaker systems.\u003c\/li\u003e\n\u003cli\u003eNo advanced DSP or multi-channel surround features, as it is a 2.0 stereo board only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier chip\u003c\/td\u003e\n\u003ctd\u003eTPA3116D2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e2.0 (left and right)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput power\u003c\/td\u003e\n\u003ctd\u003e50W + 50W (per channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003eDC 12V - 24V\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\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0 and AUX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-voltage, under-voltage, over-temperature, short-circuit, reverse connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ZK-502T is a practical, value-focused amplifier board for DIYers who want dependable stereo power and modern connectivity without fuss. With the TPA3116D2 chip, dual 50W outputs, and broad voltage support, it covers the needs of most bookshelf or small-room speaker builds while offering protections that reduce risk during experimentation. It represents good value for anyone assembling a custom powered speaker or upgrading passive speakers where 4-8 ohm compatibility and Bluetooth streaming are priorities.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run the board from a 12V car battery?\u003c\/strong\u003e\u003cbr\u003eYes, the board accepts 12V DC input and can be powered from a car battery or 12V supply, but ensure proper wiring and fused connection for safety.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size speakers work best?\u003c\/strong\u003e\u003cbr\u003eUse speakers rated 4-8 ohm and between roughly 15W and 100W; matching speaker sensitivity and power handling will give the best results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it support Bluetooth streaming and wired sources at the same time?\u003c\/strong\u003e\u003cbr\u003eIt supports both Bluetooth 5.0 and AUX inputs; typical operation switches between sources but confirm wiring and input selection on your specific board version.\u003c\/p\u003e","brand":"Daakro","offers":[{"title":"Default Title","offer_id":46755822633179,"sku":"B0DK4N6RF9","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71ykZTdWTML._SL1500.jpg?v=1747854446","url":"https:\/\/gearmusthave.com\/products\/zk-502t-50w-2-0-channel-bluetooth-amp-board-high-fidelity-diy-audio","provider":"GearMustHave","version":"1.0","type":"link"}