A few of things to check before you go buying anything.
- Has it been a while since the bass was set up? If so, do it.
- Has your slapping technique changed? It happens, maybe you're just really slapping and plucking to hard.
- Check the pickup height. If the treble side is too close to the strings, this could cause distortion when you're plucking the G while slapping.
- If you have an LH3 preamp try adjusting the mini gain pot on the circuit board - dial it back a bit and check to see if the distortion persists.
- While you have the control cavity cover off, check for any loose connections, wire leads touching where they shouldn't be, jack connections, etc.
