Its going to be killer for slap tone. For finger you will want roll off your neck pickup just a tad. Hit an open note and listen for it to change to more of a wahh (small turn of the knob will do it). That will get you some mids back. This is a powerful boost only pre. Set volume to 10 and then use headphones so you can hear the details. If you are boosting bass or treble past halfway, I'd be real surprised. I rarely went past the third line on the pre. Remember, the more you boost, the more the mids are cut.