Changes up the function of position three on your five-way pickup swtich for a an even bolder, deeper bridge/middle pickup tone when activated.
The Stacker card modifies the function of the five-way pickup switch such that position three activates the bridge and middle pickups in series rather than the middle pickup by itself. This gives you a sound similar to pickup switch position two (bridge and middle) but with more 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.
For DIYers looking to mix up their standard setup. Order today!