HANISH 2.1Subwoofer Bass Treble Board,SUB GAIN Adjustable Preset Deep Bass, 24V to 45V DC Dual Supply

HANISH 2.1SUB + Left-Right Bass Treble Board, 2.1 channel This subwoofer and left & right upgraded passive pre-amplifier board has a higher gain control circuit that adds rich detail to the sound. Raise Maximum Audio Gain You can play bass and treble in both high and low ranges.low noise.Deep bass, 24V to 45V DC Dual Supply