Thank you so much for your time in diagnosing this issue! It's clear you really know your stuff about amps! Turns out it was a dirty connection from the footswitch. Hit the input with Deoxit D5 and the issue seems to have resolved itself.
Tested without pedal, then tested with only...
Thank you so much for your time! Turns out it was a dusty contact in the F/S input jack. Hit it with Deoxit d5 and it's back to normal! I wrote the full description to solve - for anyone else out there experiencing this issue - in another reply.
Back to ripping riffs! Thanks again!
Thank you for your reply! When you wrote that, something inside me knew there was some truth to it. Investigated it today.
Here's how the issue was resolved for anyone out there experiencing the same thing.
Even though I keep my head in a dust cover and the pedal in a bag, it...
New to the thread here. I have a Marshall DSL20 HR and up until recently worked great. Got it second hand so pretty sure sending it back is not an option.
Anyways, here's the issue I'm having and maybe others are having it as well.
Classic Gain -> no problems, sounds great...