Quote Originally Posted by gatorbrit View Post
Regarding 20 vs 40W. Blackstar amps for example have 20W and 40W version. Apart from the cost difference, and a little added weight, and of course the higher output, is there any disadvantage to having the 40W for someone who rarely plays at loud gig levels?

I guess I am thinking about keeping my options open but trying to find a one amph fits all solution.
The apparent loudness isn't going to be that different. Wattage is logarithmic; that is a 100 amp is only twice as loud as a 10 watt amp.

The real difference is in clean headroom. A 20 watt amp is going to overdrive faster and run out of clean headroom sooner.