For more than forty years, the Seymour Duncan JB has been the ultimate in hot-rodded humbuckers. One of the first humbuckers ever developed with high-output in mind, this pickup boasts the immense range of an alnico-V magnet and extra winding: the secret JB-recipe for a hefty guitar upgrade. Here, Seymour Duncan have taken their legendary JB humbucker and fully optimised it for the bridge position of tremolo-loaded ST-style guitars. As such, the high-gain TB-4 JB Trembucker spits genuine JB tone and comes pre-fitted with four-conductor wires to support coil-split switching. The Trembucker If you're thinking about changing up the pickups of your beloved guitar, there are a few factors that need some attention. One of the most overlooked is the string-spacing - literally, the space between each string. The string-spacing of a fixed bridge will be different from the string spacing of a tremolo bridge and, while we're only talking a fraction of a millimetre, will affect the kind of pickup you can install at the bridge. For the best results, the magnet poles of any pickup need to sit directly beneath the strings. As such, the Seymour Duncan TB-4 is a Trembucker has been designed exclusively to match the string spacing of a tremolo bridge. That Legendary JB Sound If you just want a higher output than any standard humbucker can give you, then this pickup will definitively give you that. But, the JB does so much more. The hair-raising mid-range punch is framed by tight basses and solid trebles, completing an immediately recognisable sonic character. Even wiped clean, the JB packs robust output, making it an as-yet unrivalled all-rounder. Couple it up with something a little milder like a Seymour Duncan Jazz model, and you're treated to the ultimate combo.