DC resistance. 10.36 k. Resonant peak. 5.2 KHz . Dimensions. 3.31 W x .73D x .85H. The Seymour Duncan STK-S4b Classic Stack Plus guitar pickup for the bridge position is recommended for all well-balanced instruments, it works equally well with maple and rosewood fingerboards when playing country, pop, surf, rockabilly, blues, ska and classic rock. The Classic Stack Plus' revolutionary design injects tunable "negative hum" into the pickup circuit. Each unit 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 RW/RP allowing hum-cancellation when used with the neck or bridge pickup