First, I want to apologize for my novice. I searched and read and looked around and tried to figure out what a phase splitter does, I just cant figure it out. I had a problem with the lead channell on my amp sounding too bassy...then I hit the boost and boom some treble. I replaced the 12ax7 (that I think is bad) with a 12at7 in the Phase Splitter socket and it sounded MUCH better. So does that make sense? I mean should that have solved the problem? btw Amp Gibson Supergoldtone GA30-RVH 2x 12ax7 for the gain channel I have the schematcis, but they look like gibberish to me. Thanx!