The Evolution neck and bridge humbuckers are the result of two years of research to come up this the right sound for a very demanding player: Steve Vai and his Ibanez Hems. Both pickups are designed fro maximum impact and power. The neck pickup is fat, punchy and loud. The bridge pickup is tight, aggressive and louder. Both pickups have our patented dual-resonance configuration to reproduce more harmonic overtones than conventional humbuckers. Evolution pickups are not polite-sounding, and they're not for the inexperienced, but--if you've got the chops and a hot amp--your sound will burn. The Evolution pickups were originally designed with live gigs in mind, but they have so much presence and definition that they're great recording pickups, too; they slice right through even the densest mix.