Wow, this thing is cool. I thought it sounded good on guitar, but man, this thing rocked through my bass rig with my jazz bass. It has such an amazing grind, and it really worked well with my guitarist. And get this: My guitarist specified one of the goals of our band to be more comlicated and more pronounced bass, because not a lot of bands make good use of their bass player. He also commented on his liking of my distortion tone with this little beastie pedal. It actually preserves lows well, due to it's 3 band EQ. I reccomend giving it a try.