This was exactly my experience. I had forgotten all about the crossover control, and had left it cranked from day one. I wondered why I was having a hard time taming the harshness with my bass and amp controls... then one day I was setting up for a gig, and as I was pugging my amp into the cab, I saw that control, and felt like an idiot for forgetting about it. I dialed it back to about 50%, and all my problems went away. It's been sounding great, and not harsh at all, ever since.
Isn't it great when a simple fix solves the issue? I discovered if I plug my amp in, it works 100% better. lol
