I use this with a Precision bass and a Bassman 250 head. I have the Sans Amp looped between the tuner output and the effects loop input. This way I get a buffered signal with no EQ to the Sans Amp. I can then use it to change the charactor of sound I have. I have a bass boost, a mid boost and a distortion voice programmed into it. I found that it took a while to get a feel for how each of the controls actually worked. The memory feature of this pedal is great. Work with it at rehersal to get the sound you want, set it to memory and then you are good go anywhere any time. I use this with an AC adaptor and have had no noise or hum issues. I found that the battery life wasn't that great, and if the battery goes dead then no sound comes out! (Buffered bypass) All in all, this is a great solution for changing sounds during a song or making a simple bass like a Fender Precision have multiple personalities.