Ok, so most of you know I got myself a Yamaha AE500 the other day. I should have expected a fartload of unwanted feedback at loud volumes, what with it being a hollowbody and all, but instead I brought it to a Greasy Knots practice session.

Now I'm a guy who loves his feedback, but last night was just too much. I tried turning the volume down, standing far away from the amp, positioning the amp differently, etc, etc. Nothing really seemed to help a whole lot. Any tips on getting rid of (or at least reducing) this?

[By the way, I know this question has probably been asked a gazillion times. Dial-up internet is just far too slow to justify going through a bunch of past threads. Forgive me.]