Jumper A and B control the bass audio range. Jumper A sets the lower limit, while Jumper B sets the upper limit. Excessive bass may cause speaker distortion. To reduce distortion, remove the jumper cap from Jumper A to limit ultra-low bass frequencies. Removing the cap from Jumper B increases bass output; with the cap in place, bass is reduced. Jumpers C and D control the treble range. With both caps installed, treble output is maximum. With only the cap on Jumper C, treble is reduced. With only the cap on Jumper D, treble is further reduced. With both caps removed, treble output is disabled. To use the splitter board: 1. Connect according to the labeled terminals (Treble, Low, Input). 2. Connect to the speaker and ensure proper enclosure sealing. 3. Play music and adjust jumpers for optimal sound. Typical configuration: Use Jumper A and leave Jumper B unconnected. For treble adjustment, test different combinations of Jumpers C and D based on listening preference. Common configurations: - A + D: Enhanced bass response - A + C: Balanced clarity in both treble and bass - A + C + D: Emphasis on treble with balanced bass - A + B + C + D: Emphasis on mid-range frequencies If bass is excessively strong, remove the cap from Jumper A. Finalize settings based on auditory evaluation and secure the board to the speaker unit. Power rating: Up to 400W Impedance range: 4–16 ohms Frequency response: Adjustable Color: Red PCB Material: ABS plastic and metal Dimensions: 7 × 5 × 2.5 cm Package includes: 1 × Frequency Divider Note: Screen and lighting conditions may cause slight color variation between product images and the actual item. Dimensional tolerance: ±1–3 cm.