{"product_id":"zk-ht21-digital-power-amplifier-board-2-1-sound-channel-tda7498e-tune-the-high-low-overweight-subwoofer","title":"Bluetooth Audio Amplifier Boards – ZK-HT21, ZK-TB21, ZK-MT21 \u0026 ZK-502MT","description":"\u003cp\u003eBuild or upgrade your DIY speaker system with a Bluetooth audio amplifier board. Choose the model that matches your speakers, power supply and channel requirements.\u003c\/p\u003e\u003ch3\u003eChoose your model\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZK-HT21:\u003c\/strong\u003e 2.1-channel board with TDA7498E chip, Bluetooth 5.0, AUX and USB inputs. DC 15–36V supply, with 12V supported. Listed maximum output: up to 160W per left\/right channel and 220W for the subwoofer. Dimensions: 145 × 126 × 28mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZK-TB21:\u003c\/strong\u003e 2.1-channel board with TPA3116D2 chip, Bluetooth 5.0 and AUX input. DC 12–24V, 5A or higher supply. Listed maximum output: up to 50W per left\/right channel and 100W for the subwoofer. Dimensions: 118 × 100 × 22mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZK-MT21:\u003c\/strong\u003e 2.1-channel board with Bluetooth 5.0 and AUX input. DC 12–24V, 5A or higher supply. Listed output: below 50W per left\/right channel and below 100W for the subwoofer. Dimensions: 93 × 90 × 22mm. Do not connect a 24V battery pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZK-502MT:\u003c\/strong\u003e 2.0-channel stereo board with Bluetooth 5.0 and AUX input. DC 9–24V, 3A or higher supply. Listed maximum output: 50W × 2. Dimensions: 89 × 60 × 21mm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpeaker matching\u003c\/h3\u003e\u003cp\u003eZK-HT21 supports listed speaker ratings of 30–200W at 4–8Ω. ZK-TB21 and ZK-MT21 support 20–100W speakers at 4–8Ω. ZK-502MT supports 15–100W speakers at 4–8Ω. For 2.1-channel models, use a dedicated subwoofer on the subwoofer output.\u003c\/p\u003e\u003ch3\u003ePower and installation\u003c\/h3\u003e\u003cp\u003eOutput depends on the selected model, supply voltage and current, speaker impedance and audio input. Maximum ratings are not guaranteed continuous output. Use a stable, low-ripple DC supply rated above the amplifier's actual power demand and within the selected model's voltage range. Check your selected variant before connecting power or speakers.\u003c\/p\u003e","brand":"My Store 5","offers":[{"title":"ZK-502MT","offer_id":67765183119593,"sku":"3:201010228#ZK-502MT","price":339.99,"currency_code":"ZAR","in_stock":true},{"title":"ZK-TB21","offer_id":67765183054057,"sku":"3:18247432443#ZK-TB21","price":659.99,"currency_code":"ZAR","in_stock":true},{"title":"ZK-HT21","offer_id":67765183086825,"sku":"3:202097275#ZK-HT21","price":1249.99,"currency_code":"ZAR","in_stock":true},{"title":"ZK-MT21","offer_id":67765183152361,"sku":"3:1981284404#ZK-MT21","price":499.99,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/0449\/2777\/files\/audio-cutout-55436ebf-4e74-4f54-b778-b7e99e65e94e.png?v=1793721612","url":"https:\/\/diyprojectsaudio.myshopify.com\/products\/zk-ht21-digital-power-amplifier-board-2-1-sound-channel-tda7498e-tune-the-high-low-overweight-subwoofer","provider":"Electronic diy","version":"1.0","type":"link"}