{"product_id":"hochanan-2-1-bluetooth-amplifier-board-12-24v-50w-100w","title":"HOCHANAN 2.1 Bluetooth Amplifier Board 12–24V 50W+100W","description":"\u003cp\u003e\u003cstrong\u003eHOCHANAN ZK-MT21 is a compact 2.1-channel Bluetooth amplifier board that powers left\/right passive speakers plus a subwoofer, with tone controls and inputs for DIY home audio upgrades.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you want to add modern wireless streaming and adjustable bass to passive bookshelf speakers, an old TV soundbar, or a custom speaker project, the ZK-MT21 delivers big output from a very small circuit board. The unit supports Bluetooth 5.0 streaming, a 3.5mm auxiliary input, and separate outputs for two stereo channels and a powered subwoofer. It’s designed for hobbyists and installers who prefer a hands-on approach: the board ships with top and bottom covers, knobs, screws, and a screwdriver so you can assemble it quickly and integrate it into enclosures.\u003c\/p\u003e\n\n\u003ch3\u003eHow much speaker power can this amp actually drive?\u003c\/h3\u003e\n\u003cp\u003eThe ZK-MT21 supplies up to about 50W per left\/right channel into 4–8Ω speakers and can drive a subwoofer up to 100W. Output depends on your supply voltage and speaker impedance; using a higher-voltage DC supply yields more headroom and bass impact.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft\/right channels: up to 50W each (4–8Ω).\u003c\/li\u003e\n  \u003cli\u003eSubwoofer output: up to 100W peak.\u003c\/li\u003e\n  \u003cli\u003eRecommended power input: 12–24V DC at 5A or greater (supply not included).\u003c\/li\u003e\n  \u003cli\u003eHigher voltages (24V) provide stronger bass and louder overall volume.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I stream from my phone or connect a TV?\u003c\/h3\u003e\n\u003cp\u003eYes — Bluetooth 5.0 lets you pair phones, tablets, and other Bluetooth sources within roughly 10 meters (about 33 feet). If you prefer a wired connection, the 3.5mm AUX input accepts any device with a headphone or line output, including TVs, computers, and media players.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWireless: Bluetooth 5.0 for stable streaming and easy pairing.\u003c\/li\u003e\n  \u003cli\u003eWired: 3.5mm AUX input for TVs and legacy devices.\u003c\/li\u003e\n  \u003cli\u003eIdeal for switching between modern streaming and traditional audio sources.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tone and bass controls are available for shaping sound?\u003c\/h3\u003e\n\u003cp\u003eThe board includes a set of intuitive knobs to fine-tune the overall tone and bass behavior. Controls let you adjust master volume, subwoofer level and sub frequency (20–200Hz), plus bass and treble for the left and right channels, so you can tailor the sound for music or movies.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaster volume for overall loudness control.\u003c\/li\u003e\n  \u003cli\u003eSub level and adjustable sub frequency (20–200Hz) for bass tuning.\u003c\/li\u003e\n  \u003cli\u003eSeparate bass and treble knobs for left\/right channels.\u003c\/li\u003e\n  \u003cli\u003eFine adjustment suitable for small rooms or larger living spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is assembly and what accessories are included?\u003c\/h3\u003e\n\u003cp\u003eThe package is aimed at DIYers and requires minimal assembly: attach the included covers, secure the fasteners, and add the knobs. The metal enclosure keeps the board cool during long listening sessions, and the kit includes basic hardware to get you started without sourcing extra parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes top\/bottom covers, 8 screws, 5 knob caps, and a screwdriver.\u003c\/li\u003e\n  \u003cli\u003eSimple mounting — designed to be installed into custom or existing enclosures.\u003c\/li\u003e\n  \u003cli\u003eBarely warms during extended use, reducing thermal concerns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The HOCHANAN ZK-MT21 is best for hobbyists, tinkerers, and homeowners who want to upgrade passive speakers or build custom audio projects with modern streaming and subwoofer support. It’s also useful for refurbishing older soundbars and for anyone needing compact, adjustable amplification for TV or desktop audio without buying a full-size receiver. Note: a suitable 12–24V DC power supply is required but not included; choose a supply rated 5A or higher for optimal performance.\u003c\/p\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 power supply do I need for the ZK-MT21?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use a 12–24V DC supply rated 5A or higher; 24V typically gives more headroom and stronger bass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this amp drive passive bookshelf speakers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it supports 4–8Ω passive speakers up to roughly 50W per channel and a sub up to 100W.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"HOCHANAN","offers":[{"title":"Default Title","offer_id":48455091224733,"sku":"B0DQ3YWL94","price":22.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/hochanan-zk-mt21-front-panel.jpg?v=1781718560","url":"https:\/\/nexoltic.com\/products\/hochanan-2-1-bluetooth-amplifier-board-12-24v-50w-100w","provider":"Nexoltic","version":"1.0","type":"link"}