I think DiMarzio has QC issues but I am trying to be flat and not jump to leading everyone down that road here. I had the same exact issues you describe with the thinness on the lower strings on 2 different sets of area Js. Then as I mentioned the A poles went completely out.I appreciate your response. I haven't had any problems like you describe. It's just the tone. If I get a nice, rich, articulate sound on the E & A strings, the D & G strings are thin, almost brittle-sounding (mostly the G). If I get a better tone out of the D & G strings, the E and A strings get muddy. The Sixties Jazz pickups