{"product_id":"wuzhi-audio-zk-tb21-50w-50w-100w-2-1ch-5-0-zk-tb21-bluetooth-subwoofer-amplifier-board-bass-treble-control-aux-usb","title":"Wuzhi Audio ZK-TB21 50W+50W+100W 2.1CH 5.0 (ZK-TB21) Bluetooth Subwoofer Amplifier Board Bass\/Treble Control, AUX\/USB","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eZK-TB21 50W+50W+100W 2.1CH Bluetooth 5.0 Subwoofer Amplifier Board Bass\/Treble Control, AUX\/USB Input, Overload Protection, Compact for Vehicle Amplifier (ZK-TB21)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWuzhi Audio ZK-TB21 50W+50W+100W 2.1CH 5.0 (ZK-TB21) Bluetooth Subwoofer Amplifier Board Bass\/Treble Control, AUX\/USB\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ZK-TB21 Bluetooth amplifier board uses two TPA3116D2 chips, delivering a peak output power of 50W+50W+100W. It can drive most small to medium-sized speakers and is a great choice for DIY audio enthusiasts building portable or home audio systems. The ZK-TB21 Bluetooth amplifier board supports two mainstream audio input methods: 3.5mm AUX wired input and Bluetooth connection. It works with a wide range of devices. Whether used in a home audio system, portable speaker, or DIY audio project, it offers flexible performance and a convenient audio playback experience. 1.Large Heat Sink The ZK-TB21 is equipped with a large heat sink to ensure the amplifier does not overheat during long periods of operation, allowing the device to run stably. 2.TPA3116D2 Chip Developed by TI, this chip features excellent performance with a maximum modulation frequency of up to 1.2MHz and total harmonic distortion (THD) less than 0.1% at high power output. It offers high efficiency, low distortion, and strong output power. 3.Bass and Treble Adjustment Knobs The ZK-TB21 supports independent bass and treble adjustment, allowing you to customize the sound to your personal preferences.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Wuzhi Audio\u003c\/p\u003e\n\u003cp\u003e50w 50w, bass, protection compact, tb21, board, input, treble control, theater, usb input, board bass, input overload, tb21 50w Electronics Home Audio Home Theater Receivers \u0026amp; Amplifiers Amplifiers\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✓ High-Performance Audio Output Deliver crisp, powerful sound with 50W x 2 (L\/R channels) + 100W (subwoofer) output. Features Bluetooth 5.0 for wireless streaming (up to 15m range) and AUX input for wired connections. Pro Tip: Disable Bluetooth when using AUX input as Bluetooth takes priority.\u003c\/li\u003e\n\u003cli\u003e✓ Universal Compatibility \u0026amp; Flexible Power Input Supports a wide 12-24V DC input via a standard 5.52.1mm DC jack, compatible with most power adapters. Perfect for versatile setups, from DIY projects to professional installations.\u003c\/li\u003e\n\u003cli\u003e✓ Dual Connectivity \u0026amp; Smart Priority Features Bluetooth 5.0 for seamless wireless streaming and a 3.5mm AUX port for wired connections. Bluetooth mode automatically takes priority when enabled, ensuring uninterrupted wireless playback.\u003c\/li\u003e\n\u003cli\u003e✓ Customizable sound control: equipped with five intuitive knobs for bass enhancement, treble adjustment, master volume and subwoofer frequency and volume adjustment, allowing users to fine tune audio output to match personal preferences or room acoustics.\u003c\/li\u003e\n\u003cli\u003e✓ Robust Protection \u0026amp; Reliable Support Built-in safeguards include undervoltage\/overvoltage protection, reverse polarity protection, and thermal shutdown to prevent damage. Backed by responsive customer service for troubleshooting and warranty assistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✓ Item Weight: 97 Grams\u003c\/li\u003e\n\u003cli\u003e✓ Material Type: PCB\u003c\/li\u003e\n\u003cli\u003e✓ Included Components: Amplifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping \u0026amp; Guarantees\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✓ FREE standard shipping within the United States (3-6 business days)\u003c\/li\u003e\n\u003cli\u003e✓ 100% money-back guarantee for lost or damaged items\u003c\/li\u003e\n\u003cli\u003e✓ Secure checkout with encrypted payment processing\u003c\/li\u003e\n\u003cli\u003e✓ Shipping via UPS, FedEx, and USPS\u003c\/li\u003e\n\u003cli\u003e✓ Ships to lower 48 states only (no PO Boxes \/ APO \/ FPO)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✓ 30-day hassle-free returns\u003c\/li\u003e\n\u003cli\u003e✓ Items must be unused and in original packaging\u003c\/li\u003e\n\u003cli\u003e✓ Full refund if item is not delivered\u003c\/li\u003e\n\u003cli\u003e✓ Guaranteed delivery within 6-7 business days\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePayment Methods\u003c\/h3\u003e\n\u003cp\u003e✓ Credit Cards, PayPal, Shop Pay, Apple Pay, Google Pay, Amazon Pay, Meta Pay\u003c\/p\u003e\n\u003ch3\u003eCustomer Support\u003c\/h3\u003e\n\u003cp\u003e✓ Questions? Contact us at \u003cstrong\u003eSupport@GiftAbay.com\u003c\/strong\u003e\u003cbr\u003eWe respond within 24 hours on business days.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Wuzhi Audio","offers":[{"title":"Default Title","offer_id":59538957402398,"sku":"TGABL2557186","price":32.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0991\/7677\/5966\/files\/71WPnzqhWkL._SL1500.jpg?v=1782889849","url":"https:\/\/1gmih3-5s.myshopify.com\/products\/wuzhi-audio-zk-tb21-50w-50w-100w-2-1ch-5-0-zk-tb21-bluetooth-subwoofer-amplifier-board-bass-treble-control-aux-usb","provider":"Fast Buy02","version":"1.0","type":"link"}