ZK-AS21 2nd Gen 2.1 Channel Bluetooth Power Amplifier Board with TWS, 220W×2 + 350W, TPA3255 Chip, Vehicle Amp with Bluetooth/AUX/USB Inputs

[TPA3255 Hi-Fi Chipset] The ZK-AS21 2nd Gen amplifier board uses dual TPA3255 amplifier chips, supporting a broad voltage input range of 18-38V DC and delivering up to 220W×2 + 350W (PMPO) output.
Note: Minimum operating voltage is 18V; the board will not function properly below this threshold. [TWS True Wireless Stereo Pairing] Features one-touch TWS pairing to wirelessly synchronize two amplifier boards for immersive left/right channel stereo soundideal for building customized wireless speaker systems. [Multiple Input Options] Offers versatile connectivity including Bluetooth, AUX audio input, USB flash drive playback, and USB sound card compatibility. Ensures quick and effortless pairing with various devices for seamless operation. [Comprehensive Protection Mechanisms] Equipped with multi-layer safeguards such as short-circuit protection, under-voltage protection, over-voltage protection, and clipping prevention to ensure stable and reliable performance. [Multifunctional Rotary Dial] The integrated rotary knob enables play/pause, volume adjustment, track navigation (previous/next), TWS mode activation, and input source switching for intuitive control