JETCH SUBWOOFER PRE Board, Improved high Gain Control Circuit J-B-L,SUB Audio Maching Smooth Bass, All Spare is Genuine DC 24V to 40V Dual Supply

Enhanced High Gain Control Circuit J-B-L, Enhanced Jetch Subwoofer Pre Board, Smooth Bass Machining, And Dc 24v To 40v Dual Supply Are All Spares Genuine Include