got a mesa v-twin to replace my 50 cal's deteriorating channel 2. i'm once again finding out why everybody says it takes a while, even up to some weeks to find the "sweet spot". i can't even describe what i'm hearing now. just unbelievable. i can't quite be sure, but i think i'm even getting the coveted POWER TUBE OVERDOSE!!! cuz i'm getting a sort of "bite" and attack that i haven't heard before out of this amp. even at apartment levels i'm able to jack the master volume up almost 2/3'rds full open.
Yeah, Mesas are like that - I got frustrated to the point of almost selling my DC, but then as a last-ditch attempt decided to try a 12AT7 in the PI slot - and lo and behold! it's like a brand new amp...