The Gallien-Krueger PLEX Preamp bass guitar pedal delivers an incredible arsenal of tools. A 4-band active EQ yields endless sound-shaping opportunities. The PLEX's Contour control will make fans of the legendary 800RB bass head feel right at home. Smooth out your sound using the PLEX's built-in compressor. Maintain your intonation with the PLEX's chromatic tuner. Make your weak bass signal pop with the PLEX's boost function. A direct XLR out lets you plug straight into a console or PA. One of our favorite uses for the Gallien-Krueger PLEX Preamp bass guitar pedal here at GearNuts is as a re-amping device via its USB in/out.