Made of high-quality double-sided panels, simple and elegant design with organized wiring, this module offers a high signal-to-noise ratio and strong anti-interference performance. Voltage: AC 9V-12V Power: 10W dual power transformer Audio Input: Two-channel stereo input Audio Output: Continuously adjustable subwoofer output Crossover Frequency: 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, functioning as a low-pass filter. The output connects to a standard power amplifier to create a subwoofer amplifier. Input supports mono or stereo, offering flexible and convenient operation. Requires only a small power transformer due to low circuit power consumption. Due to different production batches, variations in appearance, color, and printed text may occur. These differences do not affect functionality. Color: Black Material: PCB Package Contents: 1 x Bass Crossover Board Note: The package includes only the items listed above. Other accessories are not included. Lighting and display settings may cause slight color variations between the product image and the actual item. Measurement error allowed within +/- 1-3 cm.