“When I started using preamps in basses, NYC session players were looking for ways to cut through better, both live and in the studio. I had started to experiment with circuits from Stars Guitars in San Francisco and later with Bartolini.  After I had installed a few, Marcus Miller came to the shop asking me to do everything I could to improve his bass. In addition to a good fret job, a better bridge, and some electronic shielding, I installed the treble and bass boost FET circuit I was using and “the rest is history”! —Roger Sadowsky