Jumper based tone control for compatible speakers - Bass control with Jumpers A and B: A defines the lower boundary of the bass range; B defines the upper boundary. Some speakers may distort if bass is boosted too much. - How to adjust bass distortion: If distortion occurs, remove the cap from Jumper A to limit ultra-deep bass and reduce distortion. Removing the cap from Jumper B increases bass; leaving the cap on Jumper B reduces bass. - Treble control with Jumpers C and D: C and D control the treble range. When the caps on Jumper C and Jumper D are in place, treble is at its loudest. - Practical benefits: Gives precise, hands-on tone customization for compatible speakers; simple cap-based adjustments without complex electronics; helps prevent distortion while enabling bass or treble adjustments as needed. - Compatibility and setup: Designed for speakers that support jumper-based tone control (A, B, C, D). Adjust by removing or leaving caps on the jumpers as described. - Use scenarios: - High-volume music with boomy bass: remove A cap to limit very deep bass and reduce distortion. - Home cinema with strong bass passages: remove B cap to boost bass, then reinsert B cap to reduce it as desired. - Critical listening or bright sound preference: keep caps on C and D to achieve maximum treble output. - Notes: The description reflects the original jumper-based control functions and does not introduce additional models or modifications beyond the stated options.