ZK-TB21 Pro 2.1 CH 50WX2+145W AMP TPA3116 Bluetooth Audio Amplifier Board ZK-TB21 Pro DC12-24V BT 5.1 8A BT/AUX/USB Input Power Amplifier with Treble and Bass Control,for DIY Wireless Speakers Board

The upgraded ZK-TB21 PRO delivers powerful 50W×2 + 140W output with Hi-Res sound performance, solving common DIY pain points like weak bass, limited expansion, and system noise. It features a mic expansion port, dedicated subwoofer output, and anti-pop mute control, allowing flexible system upgrades without replacing the whole amp. A highly cost-effective solution for users who want pro-level performance and expandability on a budget. This TPA3116D2 Amplifier with Multi-Input, Bluetooth/AUX/USB Drive/USB DAC. High-current DC12-24V/8A+ power supply ensures stable performance even at peak loads, making it ideal for demanding audio applications.

This compact amplifier board integrates 5 professional-grade control knobs (bass/treble/subwoofer/volume/balance) for precise audio tuning, delivering crystal-clear layered soundscapes and powerful earth-shaking bass - perfect for DIY speaker projects, home theater upgrades, and car audio systems. Compatible with SOP8 / DIP8 op-amp packages, allowing easy op-amp replacement for sound tuning and audio customization. Features mic expansion port, subwoofer output, and anti-pop mute control, enabling flexible system expansion and stable operation. Designed for DIY audio amplifier and custom sound systems, it supports gradual upgrades so users can build their own personalized amplifier setup with good cost-performance and flexibility.

A complete wireless audio solution that combines pro-grade amplification with plug-and-play Bluetooth 5.1 convenience for speakers, car audio, or home systems