Jumper A and B control the bass audio range. Jumper A sets the lower limit, while Jumper B sets the upper limit. Excessive bass can cause speaker distortion. To reduce distortion, remove the jumper cap from Jumper A to limit very low bass frequencies. Removing the cap from Jumper B increases bass output; with the cap installed, bass is reduced. Jumpers C and D control the treble range. With both caps installed, treble output is at maximum. With only the cap on Jumper C installed, treble is reduced. With only the cap on Jumper D installed, 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 your speaker system. 3. Ensure proper acoustic sealing. 4. Play audio and adjust jumpers for optimal sound. Typically, Jumper A is used while Jumper B remains unused. For treble adjustment, listen carefully to determine the preferred setting. Common configurations include: - A + D: Enhanced bass response - A + C: Balanced clarity in both treble and bass - A + C + D: Balanced clarity with slight treble emphasis - A + B + C + D: Emphasis on mid-range frequencies If bass output is excessive, remove the cap from Jumper A. Finalize settings based on auditory preference and secure the board to your speaker unit. Power rating: 400W maximum Impedance range: 4–16 ohms Frequency response: Adjustable Color: Red PCB Material: ABS plastic + metal Dimensions: 7 × 5 × 2.5 cm Package includes: 1 × Frequency Divider Board Note: Color appearance may vary slightly due to lighting and screen settings. Dimensional tolerance: ±1–3 cm.