Originally Posted by: PRSplayaI think I might have fixed it, but I wont know for sure until Saturday :( . When I got home from work yesterday, I opened it up and found that one of the fuses was blown. I'm guessing this amp is close to 10 years old, and still has the original... everything(minus the new tubes I immediately installed when I got the amp). So, I'm guessing I should go on and put in all new fuses.[/QUOTE][font=trebuchet ma]I'd want to know why that fuse blew when you set up for mono operation. Check your setup.[/font]

[QUOTE=PRSplaya]One more question... How can you tell if caps are going bad? What sound characteristics will this have on an amp?

[font=trebuchet ms]As caps age, they don't charge and discharge as quickly, so they don't fliter out the AC line ripple as well. The DC supply will 'sag' a bit more (which can sound kinda nice), and AC hum will get increasingly louder as they deteriorate.

How's the Rock Master?[/font]