{"product_id":"zk-502t-bluetooth-amplifier-board-with-treble-and-bass-control","title":"ZK-502T Bluetooth Amplifier Board with Treble and Bass Control","description":"\u003cp\u003eIn this review the ZK-502T Bluetooth amplifier board is presented as a compact, affordable stereo amp board aimed at DIY audio enthusiasts who want more control from passive home speakers. The biggest reason to consider it is the combination of the TPA3116D2 HIFI chip with dedicated \u003cstrong\u003etreble and bass control\u003c\/strong\u003e, which delivers surprisingly clean, punchy sound for its size when powered correctly. It is best for hobbyists who will install it into a small cabinet or project and who value tuning tone and efficient power use over premium industrial design.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTPA3116D2 HIFI chip:\u003c\/strong\u003e Provides stereo dual-channel output with low distortion for reliable continuous high-power operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W per channel:\u003c\/strong\u003e Delivers strong output suitable for bookshelf or small floorstanding passive speakers when supplied with adequate voltage and current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide DC input:\u003c\/strong\u003e Runs from DC 9-24V so it works with a range of adapters and battery setups; recommended above 12V\/3A for best results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth 5.0 and AUX:\u003c\/strong\u003e Offers wireless streaming up to about 49 ft in open space and a 3.5mm auxiliary input for non-BT sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreble \u0026amp; bass knobs:\u003c\/strong\u003e Physical tone controls let you tame excessive highs or lift low end for a more cinematic listening experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection features:\u003c\/strong\u003e Built-in overheat, over-voltage, under-voltage and circuit protection help safeguard the amp and connected speakers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis board is ideal for DIY audio builders who want a compact, low-power amplifier with on-board tone shaping and Bluetooth streaming. It's a strong choice for powering passive speakers in a bedroom, small living room or custom enclosure where compactness and tweakable sound matter more than show-piece fit and finish.\u003c\/p\u003e\n\u003cp\u003eIt is not the best pick for buyers seeking premium industrial design or plug-and-play high-end home theater components; some customers note the build quality is utilitarian and Bluetooth pairing can be inconsistent on rare occasions, so those needing flawless wireless reliability might prefer a fully assembled commercial receiver.\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 value for money with \u003cstrong\u003e50W x 2\u003c\/strong\u003e power and tone controls at a low price point.\u003c\/li\u003e\n\u003cli\u003eFlexible power options thanks to the wide DC 9-24V input, allowing battery use for portable setups.\u003c\/li\u003e\n\u003cli\u003eUseful protection circuitry reduces risk during extended use or voltage issues.\u003c\/li\u003e\n\u003cli\u003eCompact footprint and easy to mount inside custom projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBuild quality and enclosure finish are basic; expects DIY installation and careful mounting.\u003c\/li\u003e\n\u003cli\u003eBluetooth connectivity is mixed for some users, with occasional pairing or range quirks.\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\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e50W + 50W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking voltage\u003c\/td\u003e\n\u003ctd\u003eDC 9-24V (recommended above 12V\/3A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0 (approx 49 ft open range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.0, 3.5mm AUX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOverheat, over-voltage, under-voltage, circuit protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower connector\u003c\/td\u003e\n\u003ctd\u003e5.5 x 2.5mm (compatible with 5.5 x 2.1mm)\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, cost-effective amplifier board for DIYers who want genuine power, tone controls and flexible power options without paying for a finished chassis. While the physical build is basic and Bluetooth can be variable, the sound quality and protection features make it a smart value purchase for small-room audio projects and custom speaker builds.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it include a power supply?\u003c\/strong\u003e\u003cbr\u003eThe standard board listing does not always include a power adapter; a DC 19V 4.74A adapter is shown as a compatible option and a recommended supply is 12V\/3A or higher for best performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it with a battery?\u003c\/strong\u003e\u003cbr\u003eYes, the wide 9-24V input allows battery use; customers report good run time with suitably sized batteries when current capacity is sufficient.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow reliable is Bluetooth on this board?\u003c\/strong\u003e\u003cbr\u003eBluetooth 5.0 provides longer range in open spaces, but some users report occasional pairing quirks; use the 3.5mm AUX if you need rock-solid wired playback.\u003c\/p\u003e","brand":"DAMGOO","offers":[{"title":"Default Title","offer_id":46779605582043,"sku":"B088BP48Z9","price":21.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/711P3ljrg-L._SL1500.jpg?v=1747854476","url":"https:\/\/gearmusthave.com\/products\/zk-502t-bluetooth-amplifier-board-with-treble-and-bass-control","provider":"GearMustHave","version":"1.0","type":"link"}