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

50W×2+145W Output & 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). Multiple Inputs & 15M
Bluetooth Range: Supports 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. Power Supply Requirements & 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. All-in-One Cased
Design & Dimensions/Weight: Integrated cased design, product
size: 119×100×25mm; net weight (with case): 234.5 g, gross
weight (including packaging): 269.6 g. Compact and portable, easy to install and use in various scenarios.
Protection Mechanisms & 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