Key benefits - Precise bass control: adjust the very low bass range by removing or keeping the jumper cap on Jumper A. - Distortion reduction: removing the Jumper A cap helps limit extremely low bass and reduce distortion. - Flexible bass shaping: removing the Jumper B cap increases bass; keeping the Jumper B cap on reduces bass. - Treble optimization: Jumper C and Jumper D control the height range; with their caps on, treble becomes the loudest. - Simple, clear adjustments: A and B set bass limits, with A for the lower limit and B for the upper limit of the bass range. What it does - Jumper A and Jumper B are used to shape the bass range - A controls the lower limit of the bass audio range - B controls the upper limit of the bass audio range - Jumper C and Jumper D control the overall height/treble range - When the caps on C and D are engaged, treble is amplified Jumper details - Jumper A: used to control the effect on the bass range; removing the cap limits extremely low bass and reduces distortion - Jumper B: used to control the effect on the bass range; removing the cap increases bass, while turning the cap on reduces bass - Jumper C and Jumper D: used to control the height range; placing caps on C and D yields the loudest treble How to use - To limit very low bass and reduce distortion: - Remove the jumper cap from Jumper A - To boost bass: - Remove the jumper cap from Jumper B - To reduce bass: - Turn the jumper cap on Jumper B back in place - To maximize treble loudness: - Place caps on Jumper C and Jumper D Important notes - A and B specifically govern the bass range (A = lower limit, B = upper limit) - On some speakers, distortion can occur if the bass is turned up too much Use scenarios - Scenario 1: You notice excessive bass and distortion at high volume with a bass-forward track - Remove Jumper A cap to limit extremely low bass and reduce distortion - Scenario 2: You want richer bass for a jazz or hip-hop track - Remove Jumper B cap to increase bass - Scenario 3: You aim for a brighter overall sound or to highlight high-frequency details - Place caps on Jumper C and Jumper D to maximize treble output Compatibility and installation - This adjustment system uses four jumpers labeled A, B, C, and D - Adjustments affect bass and treble range as described; ensure caps are correctly positioned according to the desired sound tuning Note: This description preserves the original jumper-based control logic and the stated effects on bass and treble without adding new specifications or claims.