This module is a subwoofer processing circuit powered by dual power , which is also known as a low-pass filter. The output terminal is connected to a common pure rear stage power amplifier, which can form a subwoofer power amplifier. The input can channel or stereo. It is very flexible and convenient to use,and the circuit consumes very little power. A 5-10W transformer is sufficient. Voltage:AC9-12V Power:10W dual power transformer Audio input:dual channel stereo input Audio output:dual bass output Frequency dividing point:72Hz Colour:As Shown Material:PC+Metal Size:PCB module size:97x64x20mm(excluding protruding parts) Package Contents: 1 * 2 Way Frequency Divider Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.