Jumper A and B control the bass o 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; with the cap in place, bass is reduced. Jumper C and D control the treble range. With both caps installed, treble output is maximum. With only Jumper C capped, treble is reduced. With only Jumper D capped, treble is further reduced. With both caps removed, treble output is disabled. To use the splitter board: Connect according to the labeled terminals (Treble, Low, Input), then connect to the speaker. Ensure proper speaker enclosure sealing before playback and adjustment. Typically, Jumper A is used while Jumper B remains unused. For treble adjustment, test different combinations of Jumpers C and D based on listening preference. Common configurations include: - A + D: Enhanced bass response - A + C: Balanced treble and bass clarity - A + C + D: Clear treble and bass, with emphasis on treble - A + B + C + D: Emphasis on mid-range frequencies If bass output is excessive, remove the cap from Jumper A. Adjust until desired sound quality is achieved, then secure the board to the speaker unit. Power rating: Up to 400W Impedance: 4–16 ohms Frequency response: Adjustable Color: Red PCB Material: ABS plastic + metal Dimensions: 7 × 5 × 2.5 cm Package includes: 1 × Frequency Divider Note: Color appearance may vary slightly due to lighting and screen settings. Dimensions are subject to a tolerance of ±1–3 cm.