Re: JS 1200 sloppily lower string sound
I had mine set up by Rich, and the guitar sounds great, but I will say this, is that for E and A string stuff I stay away from the neck pickup as it sounds kind of muddy to me, the higher strings sound very warm. But on the bridge pickup everything is bright. This is a personal preference to me, usually I will just pull the tone knob back and get the warmth that I need than going with the neck pickup. Not a setup issue, just the way the neck pickup sounds on the low E and A.
I did change from Ernie Balls 9s to Elixir 9s nanos and the helped really brighten up the sound. So maybe try and different brand of strings, guage really won't effect that brightness of your sound, at least in my humble opinion.