Originally posted by Lordathestrings
Actually, some stomboxes are sensitive to the voltage level of the battery. A fresh battery, with its higher voltage, can make it sound different than one that is running low. [/B]

I have no doubt about that, in fact, I have noticed it quite often, it was the brand thing that made me sit up and think. If someone can really tell the difference in brands, well, they are slightly more pedantic about tone than I am. Most of the time, I'm happy if the battery still has enough power in it to work for a whole gig, especially my DD-5, which is an absolute power junkie (I normally use external power, but sometimes it just isn't possible).