Made of high-quality double-sided panels, simple and beautiful, with reasonable wiring, this module has a very high signal-to-noise ratio and good anti-interference ability. Voltage:AC 9V-12V Power: 10W dual power former Audio input: two-channel stereo input Audio output: Continuously adjustable subwoofer output Frequency division point: 59Hz -- 234Hz continuously adjustable PCB module size:89x83x28 mm Module weight: 79 grams This module is a subwoofer processing circuit with continuously adjustable crossover points, that is, a low-pass filter. The output end is connected to an ordinary pure power amplifier to form a subwoofer amplifier. The input can be one channel or two channels. channel stereo, very flexible and convenient to use, and a former with very small circuit power consumption is enough. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Black Material:PCB Package Contents: 1 x Bass Crossover 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.