My G string doesn't have much sustain. I have them on a Squire VM Jazz, going through a G&K Backline 600, and a 2x10 and 1x15 Avater cab. All my other strings sound full, but the G just goes "plink." I have tried adjusting the pick ups and EQ'd for hours. I'm at a loss. Is this a string issue? Is it the bass? Why do I think a P bass sounds fuller across all the strings? Any input is appreciated.