{"product_id":"sigllr-zk-ht21-bluetooth-5-1-2-1-channel-amplifier-board-160w-2-220w-sub-for-home-car-audio-upgrade","title":"Sigllr ZK-HT21 Bluetooth 5.1 2.1 Channel Amplifier Board – 160W×2 + 220W Sub for Home \u0026 Car Audio Upgrade","description":"\u003ch2\u003eIntroducing the Sigllr ZK-HT21: a compact, feature-rich amplifier board for DIY speakers and car audio\u003c\/h2\u003e\n\u003cp\u003eThe ZK-HT21 is designed to fit into tight spaces while delivering a versatile 2.1 channel setup. It supports a wide 12–24V DC input, maintains a steady Bluetooth 5.1 connection up to about 15 meters, and offers an auxiliary input for wired sources. Independent knobs let you tailor treble, bass, and subwoofer output, giving you the flexibility to fine-tune sound for different rooms or rides without swapping components.\u003c\/p\u003e\n\u003ch3\u003eKey capabilities and performance at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.1 channel stereo\u003c\/strong\u003e with dedicated main amps and a powerful subwoofer channel for deep, controlled bass.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth 5.1 with up to 15 meters\u003c\/strong\u003e of wireless range for casual listening without cables.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAUX input\u003c\/strong\u003e plus independent tone controls to shape high, mid, and bass frequencies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-efficiency design\u003c\/strong\u003e using the TDA7498E chip and shielding to minimize noise and distortion.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-compact footprint\u003c\/strong\u003e (0.6 × 3.9 × 3.5 inches) with a robust heatsink and built-in cooling fan.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-in-1 protection\u003c\/strong\u003e against over-voltage, under-voltage, short-circuit, and overheating for safer operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-in-one kit\u003c\/strong\u003e includes power cord, mounting screws, cables, and a detailed manual for quick setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn practice, you may experience crisp highs, balanced mids, and a convincing deep bass response that can elevate everyday listening, movie moments, or in-car audio without requiring a full new stereo system. The design emphasizes reliability and ease of use, so you can explore upgrades with confidence, knowing the board is built to integrate with standard passive 4–8Ω speakers and common power supplies.\u003c\/p\u003e\n\u003ch3\u003eReal-life use cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHome theater and stereo upgrades\u003c\/strong\u003e for existing bookshelf or floorstanding speakers with a compact, shielded module.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCar audio enhancements\u003c\/strong\u003e thanks to the wide 12–24V input range and integrated sub output for stronger bass in small spaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIY speaker projects\u003c\/strong\u003e where space, heat management, and protection features matter for long-term projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultimedia setups\u003c\/strong\u003e in small studios or compact workstations requiring clear treble and solid bass response.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat you gain is a robust building block that invites experimentation with sound. While results depend on your speakers and environment, the ZK-HT21 offers a dependable path to more expressive audio without committing to a heavier or more complex system.\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOriginal power cord\u003c\/li\u003e\n  \u003cli\u003eMounting screws\u003c\/li\u003e\n  \u003cli\u003eConnection cables\u003c\/li\u003e\n  \u003cli\u003eDetailed user manual\u003c\/li\u003e\n  \u003cli\u003ePlug-and-play ready for quick installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What type of setup can Sigllr ZK-HT21 support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports 12–24V DC input with 2.1-channel output and independent tone controls for treble, bass, and subwoofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is included and how easy is installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes power cord, mounting screws, cables, and a user manual for quick plug-and-play installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sigllr","offers":[{"title":"Default Title","offer_id":48412496986269,"sku":"B0GF87G6TJ","price":39.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/sigllr-zk-ht21-bluetooth-amplifier-board-front.jpg?v=1781236005","url":"https:\/\/nexoltic.com\/products\/sigllr-zk-ht21-bluetooth-5-1-2-1-channel-amplifier-board-160w-2-220w-sub-for-home-car-audio-upgrade","provider":"Nexoltic","version":"1.0","type":"link"}