The XTCT is a tone control module designed for electric guitars, basses, and other electronic musical instruments. It yields a very wide range of boost or attenuation of the Bass, Midrange, and Treble regions of the musical instrument spectrum.
Its tonal range is at least equal to that of older Fender amplifiers with Bass, Treble, and Presence (low midrange) controls. The XTCT is designed for the input levels expected from medium output passive magnetic pickups (less than 70 mV on the output level charts in out catalog). Higher output level pickups such as active pickups or some of our 4-String Bass Humbuckers may cause distortion of the input and/or output stages of the XTCT (depending on the boost levels chosen).
Active Pickups can be attenuated easily without changing the tone quality, The XTCT-B (lower gain version of the XTCT) should be used for high output passive pickups. For pickups with low output levels (less than 30 mV on the output level charts in our catalog) the XTCT-H should be used. Wiring diagram 4 shows how to increase the overall gain of the XTCT to compensate for low output pickups. But using the XTCT-H will yield higher built-in gain at lower noise level.