19"1U 2Ch 3G/HD SDI Input+2Ch HD/3G SDI Output Video+2Way BIDI XLR Audio Over Fiber SM 20KM LC Optic Extender Transmission

30-120W Audio Amplifier Board USB Dac FM Radio Support Dual Microphone Bluetooth Amplificatore Subwoof for Speaker 12V 24V 220V

XY-S100L 2x50W + 100W 2.1 Channel HIFI Digital Power Subwoofer Amplifier Board

AK45/AK35 800W Home Power Amplifier 2 Channel Bluetooth 5.0 Mini Hifi Digital Stereo Sound Amplifier Support FM USB SD Mic input

50Wx2 Mini Amplifier With Digital Display CS8673E Digital Amplifier Bluetooth-compatible 5.0 Plug and Play AUX TF Home Theater

2x50W+100W ZK-MT21 ZK-TB21 Subwoofer Amplifier Board Power Amplifier Board TPA3116D2/CS8673E Chip Speaker Stereo Audio Receiver

CIRMECH Digital power amplifier board car high power car fever digital subwoofer power amplifier board USB remote control

Bluetooth-Compatible 12V/110-240V Home Power Amplifier Wireless Power Amplifier Stereo Audio Amplifier for Home Theater Speaker

ZK-MT21 Digital Power Amplifier Board 2x50W+100W 2.1 Channel Subwoofer AUX 12V 24V Audio Stereo Bluetooth 5.0 Bass Amplifier

HiFi Sound Amplifier 4 Channel Digital Audio Bluetooth Amplifier 1600W Peak Power Karaoke Player FM Radio Support Remote Control