Stereo Subwoofer Amp Audio Digital Amplifier 25W+25W DC12V Bluetooth Speaker
2.1 Channel 5.0 Power Amplifier Board Case Stereo Subwoofer Amp. It uses 6 imported disassembled Sanken tube pairs, 4 of which are responsible for the left and right channels, and the other 2 are connected to BTL circuits for subwoofer use.