Op amp chip: 4 NE5532 Frequency division structure: Linkwitz-Rayleigh filter Signal input: two-channel 2.0 stereo input Frequency division slope: 12dB/Oct (2nd order) Audio output: 6-channel output (treble left and right, midrange left and right, bass left and right) Capacitor type: Correction capacitor Resistor type: high-precision metal film resistor Filtering structure: high-pass, low-pass, band-pass filtering Power supply: dual power transformer 9-12V, do not exceed 12V 25W (use with preamplifier) A small transformer suitable for the module is sufficient; do not use a large transformer Module size: 99mm x 96mm x 19mm (L x W x H) Module weight: 73 grams Default crossover frequency: treble 3288Hz, midrange 328Hz, bass Product appearance, color, and printed text may vary slightly between batches; this does not affect functionality Material: PCB Color: Black Package contents: 1 x Speaker Crossover Filter Divider Note: The package includes only the items listed above. Other products are not included. Light reflection and display differences may cause slight variations in the color of the item shown in the image compared to the actual product. Measurement error allowed is +/- 1-3cm.