Active bass and treble equalizers on a concentric stacked pot bring expanded tone-shaping versatility right into your instrument. The controls provide up to 12dB of cut and boost, with center detents for quick and easy return to normal tone settings. And that's not all—a dual dip switch on the mini circuit board lets you choose from four different high end frequency presets, to get the optimum sound for your particular setup. Clean and quiet, the BTC works with any pickup, active or passive. A profitable customizing option for luthiers!