{"id":9533758963949,"title":"Bluetooth Audio Amplifier Board, ZK-TB21PRO 2.1CH 50W×2+145W Subwoofer Amp | with USB Lossless Decoding, SOP8\/DIP8 Dual Package, Mic \u0026 Subwoofer Expansion Ports, Enhanced Heat Sink","handle":"bluetooth-audio-amplifier-board-zk-tb21pro-2-1ch-50w-2-145w-subwoofer-amp-with-usb-lossless-decoding-sop8-dip8-dual-package-mic-subwoofer-expansion-ports-enhanced-heat-sink","description":"\u003ch3\u003eBluetooth Audio Amplifier Board, ZK-TB21PRO 2.1CH 50W×2+145W Subwoofer Amp | with USB Lossless Decoding, SOP8\/DIP8 Dual Package, Mic \u0026amp; Subwoofer Expansion Ports, Enhanced Heat Sink\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\u003e50W2+145W Output \u0026amp; Wide Speaker Compatibility: Left and right channels 50W each, subwoofer 145W, delivering clear and powerful sound. Compatible with left\/right speakers (20-50W, 4-8) and subwoofers (50-150W, 2-8); the lower the speaker impedance, the higher the output power (under sufficient power supply).\u003c\/li\u003e\n \u003cli\u003eMultiple Inputs \u0026amp; 15M Bluetooth Range: Support Bluetooth, AUX, PC and USB input methods (Bluetooth priority). When using AUX audio cable input, Bluetooth needs to be disconnected. Bluetooth transmission distance reaches 15 meters, ensuring stable connection in daily use scenarios.\u003c\/li\u003e\n \u003cli\u003ePower Supply Requirements \u0026amp; Stable Operation: Working voltage range: 12-24VDC, recommended voltage: 24V with 8A or above DC power supply. IMPORTANT: 24V battery is not allowed (overvoltage when fully charged); AC power is not supported. If using DC\/DC boost module, adjust to 80% of the limit voltage to avoid module damage caused by overshoot or ripple overvoltage.\u003c\/li\u003e\n \u003cli\u003eAll-in-One Cased Design \u0026amp; Dimensions\/Weight: Integrated cased design, product size: 11910025mm; net weight (with case): 234.5g, gross weight (including packaging): 269.6g. Compact and portable, easy to install and use in various scenarios.\u003c\/li\u003e\n \u003cli\u003eProtection Mechanisms \u0026amp; Practical Functions: Equipped with under-voltage, overheating, over-current, short-circuit protection and reverse connection protection, effectively protecting the amplifier module from damage. Also supports SOP8\/DIP8 dual package (free replacement of fever operational amplifiers), mic and subwoofer expansion ports, and cascade anti-POP noise mute control.\u003c\/li\u003e\n \u003c\/ul\u003e","published_at":"2026-08-17T20:52:38+10:00","created_at":"2026-08-17T19:49:14+10:00","vendor":"OEIIWLE","type":"Amplifiers","tags":["electronics_NR_Aug2026"],"price":18100,"price_min":18100,"price_max":18100,"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":50498532376813,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"B0GT4HJBRZ","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Bluetooth Audio Amplifier Board, ZK-TB21PRO 2.1CH 50W×2+145W Subwoofer Amp | with USB Lossless Decoding, SOP8\/DIP8 Dual Package, Mic \u0026 Subwoofer Expansion Ports, Enhanced Heat Sink","public_title":null,"options":["Default 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Audio Amplifier Board, ZK-TB21PRO 2.1CH 50W×2+145W Subwoofer Amp | with USB Lossless Decoding, SOP8\/DIP8 Dual Package, Mic \u0026amp; Subwoofer Expansion Ports, Enhanced Heat Sink\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\u003e50W2+145W Output \u0026amp; Wide Speaker Compatibility: Left and right channels 50W each, subwoofer 145W, delivering clear and powerful sound. Compatible with left\/right speakers (20-50W, 4-8) and subwoofers (50-150W, 2-8); the lower the speaker impedance, the higher the output power (under sufficient power supply).\u003c\/li\u003e\n \u003cli\u003eMultiple Inputs \u0026amp; 15M Bluetooth Range: Support Bluetooth, AUX, PC and USB input methods (Bluetooth priority). When using AUX audio cable input, Bluetooth needs to be disconnected. Bluetooth transmission distance reaches 15 meters, ensuring stable connection in daily use scenarios.\u003c\/li\u003e\n \u003cli\u003ePower Supply Requirements \u0026amp; Stable Operation: Working voltage range: 12-24VDC, recommended voltage: 24V with 8A or above DC power supply. IMPORTANT: 24V battery is not allowed (overvoltage when fully charged); AC power is not supported. If using DC\/DC boost module, adjust to 80% of the limit voltage to avoid module damage caused by overshoot or ripple overvoltage.\u003c\/li\u003e\n \u003cli\u003eAll-in-One Cased Design \u0026amp; Dimensions\/Weight: Integrated cased design, product size: 11910025mm; net weight (with case): 234.5g, gross weight (including packaging): 269.6g. Compact and portable, easy to install and use in various scenarios.\u003c\/li\u003e\n \u003cli\u003eProtection Mechanisms \u0026amp; Practical Functions: Equipped with under-voltage, overheating, over-current, short-circuit protection and reverse connection protection, effectively protecting the amplifier module from damage. Also supports SOP8\/DIP8 dual package (free replacement of fever operational amplifiers), mic and subwoofer expansion ports, and cascade anti-POP noise mute control.\u003c\/li\u003e\n \u003c\/ul\u003e"}