description Revolutionary patented designs injects tunable "negative hum" into a pickup circuit designed for increased output. Each pickup is factory pre-tuned to cancel the most hum possible. complete setup Recommended for bridge position. Use a Hot Stack Plus in the bridge position with the Classic version in the neck and middle for a versatile, hum-free setup. Matches well with a hot distortion pedal like the SFX-04 Twin Tube Mayhem or the SFX-08 Power Grid. guitars Works on all well-balanced instruments. available mods Three-conductor cable allows splitting for true single coil mode. When all three Stack Plus pickups are split, the middle pickup is RW/RP allowing hum-cancelation when used with the neck or bridge pickup. White or black..