I have a Mesa Boogie F-50 combo amp and for the past two days the sound quality has went way down. The sound of the amp on distortion with contour sounds almost the same as without and i figured it could be the tubes. I've never had to change tubes before and know nothing about it so any info, like if you think this is the problem and suggestions for tubes to replace it, would be awesome. thanks.
Oh ... It'll probably help to know i've had the amp for about 2 years now