Hey guys today i was lowering the action on my yamaha pbass and everything went very well except for one thing. The 4th string sounds WAY to bassie, even if its the same not than on the 3rth string it sounds much more bassie on the 4th string. And that wouldnt be a very big deal but the problem is when i try to slap i put the compression ON on my amp and the first 3 strings sound very well but when i play the 4th string it almost sounds like if it was a muted slap (very percussive) and if i play the 4th string and then any other string while the 4th string is still ringing it sounds completely death and witthout and treble and very low volume. I think the compression on my amp blocks the 4th string and since its compressing it also quiets down the other strings right? I tried getting the 4th string away from the pickup as much as i could but the problem persists... Any idea or fix? THANKS!