{"id":9533516808429,"title":"ZK-TB21 2.1 Channel Bluetooth Amplifier Board – 50W×2 + 100W Subwoofer, APP Control, Treble\/Bass \u0026 Subwoofer Freq Adjustment, TPA3116D2, DC 12-24V, BT 5.0\/AUX for DIY Home Speakers 50w*2+100w AMP","handle":"zk-tb21-2-1-channel-bluetooth-amplifier-board-50w-2-100w-subwoofer-app-control-treble-bass-subwoofer-freq-adjustment-tpa3116d2-dc-12-24v-bt-5-0-aux-for-diy-home-speakers-50w-2-100w-amp","description":"\u003ch3\u003eZK-TB21 2.1 Channel Bluetooth Amplifier Board – 50W×2 + 100W Subwoofer, APP Control, Treble\/Bass \u0026amp; Subwoofer Freq Adjustment, TPA3116D2, DC 12-24V, BT 5.0\/AUX for DIY Home Speakers\u003c\/h3\u003e\n\u003cp id=\"b\"\u003e\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003e2.1 Channel Power with Dedicated Subwoofer OutputThis 2.1 channel audio amplifier board delivers 50W 2 for left\/right channels and 100W for a subwoofer. Powered by TPA3116D2 chips with AM interference suppression, it produces clear, dynamic sound for DIY home theater, bookshelf speakers, or car audio setups\u003c\/li\u003e\n \u003cli\u003eSmart Control \u0026amp; Customizable SoundUse the free mobile app to rename the Bluetooth device or set a connection password. The board also features five physical knobs: master volume, independent treble \u0026amp; bass for L\/R channels, plus subwoofer volume and crossover frequency (20Hz200Hz). Fine-tune every detail to match your listening environment\u003c\/li\u003e\n \u003cli\u003eBluetooth 5.0 + AUX Dual InputStream wirelessly via stable Bluetooth 5.0 with autoreconnect. For wired sources, use the 3.5mm AUX input. Note: Bluetooth takes priority to use AUX mode, first disconnect any paired Bluetooth device. This design prevents accidental signal conflicts\u003c\/li\u003e\n \u003cli\u003eDC 1224V Power Range \u0026amp; Builtin ProtectionsWorks with 12V to 24V DC adapters (5A or higher recommended). A higher voltage delivers more output power. Integrated protections include overvoltage, undervoltage, overtemperature, DC detection, and shortcircuit protection helping safeguard your amplifier and speakers during DIY projects\u003c\/li\u003e\n \u003cli\u003eCompact Size \u0026amp; Easy Installation Board dimensions: 120mm 100mm 20mm (4.72 3.94 0.79), weight ~256g. Each interface is clearly labeled on the board for easy wiring without constantly checking a manual. Ideal for upgrading passive speakers, building a soundbar, or adding wireless streaming to an existing audio system\u003c\/li\u003e\n \u003c\/ul\u003e","published_at":"2026-08-17T21:22:40+10:00","created_at":"2026-08-17T18:44:04+10:00","vendor":"FORIOT","type":"Amplifiers","tags":["electronics_NR_Aug2026"],"price":15900,"price_min":15900,"price_max":15900,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50498241298669,"title":"50w*2+100w AMP","option1":"50w*2+100w AMP","option2":null,"option3":null,"sku":"B0H2F73HTD","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"ZK-TB21 2.1 Channel Bluetooth Amplifier Board – 50W×2 + 100W Subwoofer, APP Control, Treble\/Bass \u0026 Subwoofer Freq Adjustment, TPA3116D2, DC 12-24V, BT 5.0\/AUX for DIY Home Speakers 50w*2+100w AMP - 50w*2+100w AMP","public_title":"50w*2+100w AMP","options":["50w*2+100w AMP"],"price":15900,"weight":227,"compare_at_price":null,"inventory_management":"shopify","barcode":"A42_FAFC0036-003_US","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/leoforward.com\/cdn\/shop\/files\/B0H2F73HTD.jpg?v=1786956247","\/\/leoforward.com\/cdn\/shop\/files\/71tlEtSWdAL.jpg?v=1786956247","\/\/leoforward.com\/cdn\/shop\/files\/71mfUN02HtL.jpg?v=1786956247","\/\/leoforward.com\/cdn\/shop\/files\/71B6CpjMPzL.jpg?v=1786956247","\/\/leoforward.com\/cdn\/shop\/files\/71adUT-qH-L.jpg?v=1786956247","\/\/leoforward.com\/cdn\/shop\/files\/71vKzQKE6YL.jpg?v=1786956247","\/\/leoforward.com\/cdn\/shop\/files\/71C-LZYX0gL.jpg?v=1786956247"],"featured_image":"\/\/leoforward.com\/cdn\/shop\/files\/B0H2F73HTD.jpg?v=1786956247","options":["Set name"],"media":[{"alt":null,"id":41584797122797,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/B0H2F73HTD.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/B0H2F73HTD.jpg?v=1786956247","width":1600},{"alt":null,"id":41584797155565,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/71tlEtSWdAL.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/71tlEtSWdAL.jpg?v=1786956247","width":1600},{"alt":null,"id":41584797188333,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/71mfUN02HtL.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/71mfUN02HtL.jpg?v=1786956247","width":1600},{"alt":null,"id":41584797221101,"position":4,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/71B6CpjMPzL.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/71B6CpjMPzL.jpg?v=1786956247","width":1600},{"alt":null,"id":41584797253869,"position":5,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/71adUT-qH-L.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/71adUT-qH-L.jpg?v=1786956247","width":1600},{"alt":null,"id":41584797286637,"position":6,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/71vKzQKE6YL.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/71vKzQKE6YL.jpg?v=1786956247","width":1600},{"alt":null,"id":41584797319405,"position":7,"preview_image":{"aspect_ratio":1.0,"height":1600,"width":1600,"src":"\/\/leoforward.com\/cdn\/shop\/files\/71C-LZYX0gL.jpg?v=1786956247"},"aspect_ratio":1.0,"height":1600,"media_type":"image","src":"\/\/leoforward.com\/cdn\/shop\/files\/71C-LZYX0gL.jpg?v=1786956247","width":1600}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eZK-TB21 2.1 Channel Bluetooth Amplifier Board – 50W×2 + 100W Subwoofer, APP Control, Treble\/Bass \u0026amp; Subwoofer Freq Adjustment, TPA3116D2, DC 12-24V, BT 5.0\/AUX for DIY Home Speakers\u003c\/h3\u003e\n\u003cp id=\"b\"\u003e\u003c\/p\u003e \n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n \u003cul class=\"a\"\u003e\n \u003cli\u003e2.1 Channel Power with Dedicated Subwoofer OutputThis 2.1 channel audio amplifier board delivers 50W 2 for left\/right channels and 100W for a subwoofer. Powered by TPA3116D2 chips with AM interference suppression, it produces clear, dynamic sound for DIY home theater, bookshelf speakers, or car audio setups\u003c\/li\u003e\n \u003cli\u003eSmart Control \u0026amp; Customizable SoundUse the free mobile app to rename the Bluetooth device or set a connection password. The board also features five physical knobs: master volume, independent treble \u0026amp; bass for L\/R channels, plus subwoofer volume and crossover frequency (20Hz200Hz). Fine-tune every detail to match your listening environment\u003c\/li\u003e\n \u003cli\u003eBluetooth 5.0 + AUX Dual InputStream wirelessly via stable Bluetooth 5.0 with autoreconnect. For wired sources, use the 3.5mm AUX input. Note: Bluetooth takes priority to use AUX mode, first disconnect any paired Bluetooth device. This design prevents accidental signal conflicts\u003c\/li\u003e\n \u003cli\u003eDC 1224V Power Range \u0026amp; Builtin ProtectionsWorks with 12V to 24V DC adapters (5A or higher recommended). A higher voltage delivers more output power. Integrated protections include overvoltage, undervoltage, overtemperature, DC detection, and shortcircuit protection helping safeguard your amplifier and speakers during DIY projects\u003c\/li\u003e\n \u003cli\u003eCompact Size \u0026amp; Easy Installation Board dimensions: 120mm 100mm 20mm (4.72 3.94 0.79), weight ~256g. Each interface is clearly labeled on the board for easy wiring without constantly checking a manual. Ideal for upgrading passive speakers, building a soundbar, or adding wireless streaming to an existing audio system\u003c\/li\u003e\n \u003c\/ul\u003e"}