I have a Question about gain knobs in general i think this is acting like a problem. its happening on my marshall jvm410h
So last night at a show I had my gain on the od channels. At noon sounded great. Just for giggles I turned my gain past 1 o'clock and my sound went to shit. Really thin and less gainy sounding like something was Really wrong.
I know your not supposed to use that much gain. But I've never had a amp do that. They usually just add a lot of useless gain. But this sounded like something was wrong with the amp. Any thoughts?
The guys on the Marshall forums think its a bad preamp tube.