The Seymour Duncan SSL-5 sounds best with brighter-sounding guitars, and while it truly helps boost the bridge pickup, it can be used in any position.
The Seymour Duncan SSL-5 Custom Staggered Single-Coil Pickup, as the name suggests, is a high output single coil pickup designed to be perfect for Texas Blues, Rock, and even some Heavy Rock. This single-coil, single-conductor pickup features staggered Alnico 5 magnets. It sounds best with brighter-sounding guitars, and while it will really help boost the bridge pickup to better match the volume of the neck pickup, it can be used in any position.
Some players use the SSL-5 for a David Gilmour-type guitar sound. With some high gain settings on your amp and more aggressive playing, though, it’s easy to get a Stevie Ray Vaughan sound. The higher output coil will drive the input stage, which translates to a more natural overdrive. The Seymour Duncan SSL-5 really brings out the harmonics of your guitar and it is also capable of increased sustain.