I had the Steve Bailey STC 3 preamp on my six string. It is the same as the normal version but instead of the push / pull control cutting the mids for a slap sound, it boosted them for a middy fretless sound.
Sorry, but as much as I like Seymour Duncan's pickups, that preamp was inferior to just about any other active preamp I've tried. The treble control gave off a load of hiss, and the bass control had a kind of low hiss, like a rumble, if boosted. It also picked up radio interference all the time. I've had experience with Bart NTMB preamps, Fender active preamps, EMG active preamps, the Mike Pope Fodera preamp, and the Musicman active preamp, and the Duncan was by far the noisiest and most annoying of the lot.
That being said, I think they're really designed to work best with the Duncan active soapbars, so maybe with those they're great, but as a standalone active replacement preamp there are better ones out there.
Sorry, but as much as I like Seymour Duncan's pickups, that preamp was inferior to just about any other active preamp I've tried. The treble control gave off a load of hiss, and the bass control had a kind of low hiss, like a rumble, if boosted. It also picked up radio interference all the time. I've had experience with Bart NTMB preamps, Fender active preamps, EMG active preamps, the Mike Pope Fodera preamp, and the Musicman active preamp, and the Duncan was by far the noisiest and most annoying of the lot.
That being said, I think they're really designed to work best with the Duncan active soapbars, so maybe with those they're great, but as a standalone active replacement preamp there are better ones out there.