This jumper set lets you tailor bass and treble by configuring Jumper A, B, C, and D. A controls the lower limit of bass, B the upper limit. On some speakers, boosting bass can cause distortion. Key controls and effects - Bass range - Jumper A: remove the cap to limit extremely low bass and reduce distortion on affected speakers. - Jumper B: remove the cap to increase bass; when Jumper B cap is on, bass is reduced. - Treble range - Jumpers C and D: when the caps on C and D are on, the treble sound is the loudest. Why you’ll value it - Enables precise sound tailoring to your speakers and listening room. - Reduces distortion risk by limiting ultra-low bass where needed. - Simple, cap-based adjustments provide quick, repeatable tuning for bass and treble. Compatibility and use - Works with devices that use Jumper A-D to shape bass and treble. - No complex changes required; adjust by adding or removing jumper caps as described. Use scenarios - Distortion-prone small speakers: remove A cap to cap ultra-low bass and minimize distortion. - Want more bass for music or gaming: remove B cap to boost bass response. - Need brighter treble in a bright room or on dull tracks: keep C and D caps on to achieve the loudest treble.