Seymour Duncan Classic Stack Plus Strat Bridge STK-S4B in ParchmentThe Classic Stack Plus bridge pickup is wound slightly hotter than the neck and middle models to provide an even balance and output between positions. Back in the 80s we patented a special bottom coil that actually injects negative hum into the pickup circuit and at the end of the production process, we fine tune each pickup for maximum noise cancelation. You get all the great qualities of a classic Strat pickup, and none of the hum. Hand built in