Ok, I got this for christmas and I'm not supposed to play it, but when the rents aren't around I plug it in and toy around just because. I love how it plays, but I'm trying to get a "fat bassy" sound, whatever I play sounds rather harsh. So is there a wide range of tones you can pull out of the BTB pre amp, or is it all harsh and metallic? Almost like a P Bass sound that I could find? Also, I have no idea what each knob does. One does something with the mid range and it sounds like a "wah" sound almost... Help!