Key benefits and how it helps - Four jumpers A, B, C, D allow precise tuning of bass and height response on compatible speakers. - Jumper A controls the lower limit of the bass range. If Jumper A’s cap is removed, the bass is kept from becoming too deep and distortion is reduced. - Jumper B controls the upper limit of the bass range. If Jumper B’s cap is removed, bass increases; with the cap on, bass is reduced. - Jumpers C and D control the height range. When the caps on C and D are on, the height is the loudest. - Some speakers may show distortion if bass is turned up too much. Using A and B helps manage bass without overshoot. - Practical tuning tool for tailoring bass depth and high-end presence without changing hardware. Use scenarios - In a small living room with bookshelf speakers to limit super-deep bass and improve clarity. - In a home theater or gaming PC setup to optimize bass response and reduce distortion during dynamic scenes. - For critical listening or music enjoyment when you want to maximize height presence (C/D) for a more engaging sound. Notes - Jumpers A and B set the bass range lower and upper limits, respectively. Jumper C and D set the height range, with caps on delivering the loudest height. - Intended for use with speakers that support these jumper adjustments; rely on A, B, C, D to balance bass performance and sound quality.