I like it for rock. Can't get a really good jazztone out of it.
Maybe because I can't play jazz
Channel one is "vox" sparkle. Very good for country IMHO.
When turned up it rocks. (with a tubescreamer in front, it sounds nice)
Most of the time I play channel two.
This is really a rock channel. I LOVE that sound!
With my gretsch silver jet I can get this Malcolm Young kind of grind with the volume between 9 'O clock and 12 'O clock.
As someone pointed out allready, for jazz the 5E3 sounds better. (and can also rock very nice!)
And is not to loud. The DC30 is very loud.
Hope to have helped
Greetings from Belgium
Jesse