Help. I am a newbie and I am using a Fender bossman 25 watt practice amp. I also have a Ibanez PUE5 tube "thing" (for lack of better words) http://www.accordo.it/upload/ibanezpue5.JPG I can't seem to get a good sound. Any ideas? When I use distortion it makes my bass sound hollowy, thin and seems to take the "bass" out of my sound. If I crank the bass up all the way and take the trebble out it sounds like im farting if I play the low notes. Any suggestions? Should I get a new peddle made just for bass guitars? What brand?