I have an American P-bass deluxe that I play into an ampeg SVT2-pro into an SVT410HLF. My problem is that the E-string just about ALWAYS distorts, from open up to about the 7th fret. I have tried just about every switch, button, and knob on the bass, amp, and cab and I just can't the E to stop distorting... What could this be? The only thing I can think of is that the setup needs a 1x15 to clear up the lows?! Hope that's not the case... Anyone have any other ideas? I would love to hear them. Thanks!