Professional overweight pure subwoofer power amplifier board 4 2 pairs of tube imported disassemble high power tube Finished board with heat sink Power model: A1633/C4278
Working voltage: AC double 26-32V
Peak power: 350W
Easy to push 6.5-10 inch pure bass passive subwoofer
Output impedance: 4-8 ohms
Size: 16*10*4CM (board) Excluding pre-size small board size