The Super Stacker card converts the two "in-between" pickup selector switch positions of a Stratocaster-positions two and four, each of which combines two pickups-from parallel wiring to series wiring. This strengthens the tone of these two pickup switch positions, adding output, gain and low end. Also, four internal DIP switches let you select two different "treble-bleed" circuit modifications (both reduce treble loss when lowering volume) and two different tone modifications that increase the amount of treble cut affected by the tone control knobs.
Position 1 - Bridge
Position 2 - Bridge & Middle in Series
Position 3 - Middle
Position 4 - Middle & Neck in Series
Position 5 - Neck