Seymour Duncan STK-S4m Classic Stack Middle Pickup White Middle - A quiet, stacked humbucker with a traditional single-coil sound. The Seymour Duncan STK-S4 Classic Stack Plus pickup has a patent applied for design to remove hum and preserve traditional single-coil tone. This revolutionary design injects tunable negative hum into the pickup circuit. Each stacked humbucker pickup is individually factory pre-tuned to offer the optimal traditional single-coil sound with no hum. Three-conductor cable allows splitting for true single-coil mode. When three STK-S4s are all split, the middle pickup is reverse-wound/reverse-polarity allowing hum-cancellation when used with the neck or bridge pickup. Works equally well with maple and rosewood fingerboards. Recommended for country, pop, surf, rockabilly, blues, ska, and classic rock.