The SPC or "Strat Presence Control" is often called the fat control. The
original intent of the SPC was to allow guitar players to boost the
midrange and volume of their single coil pickup to give it a sound
similar to a humbucker. This is accomplished by boosting the gain in a
broad mid-band fashion and reducing the highs as you turn the knob up.
The result is a fatter, louder tone from any single coil pickup. It can
also be used with a humbucker to increase your overall volume and
midrange for a really fat tone that's great for slide guitar.
In the Box
Output jack and battery clip set.