The MB-2B Midboost/Fat Control boosts a wide mid-frequency range for a more distinct natural frequency boost than any other midboosts. The frequencies selected give your guitar the best response and sustain possible. The MB-2B Midboost/Fat Control used with a stratocaster (single coil) type pickup produces a sound very similar to the old Gibson P90 pickup. Used with humbucking type pickups, the sound is transformed into that of super humbucking pickups. The MB-2B Midboost/Fat Control produces the sound equivalent of adding 5,000 feet of wire to your pickup, and at a turn of the knob the MB-2B Midboost/Fat Control will respond by adding any amount of midboost you desire.