What I've noticed today while playing through it is that it seems to really work with the ultra head very well. For instance, with 12AX7 tubes anyway, the active EQ seems very sensitive. If you just barely turn the knob it greatly effects the tone of my rig however, with the Peavey 412m/s it appears to give you a little more 'play' in the eq. The strangest thing about the cab, to me, is that it almost sounds stuffed but, I don't think these cabs were stuffed from the factory were they? I'd love to try out some different speakers though, possibly some of those Warehouse Speakers just to see how good this cab can sound.
I've heard this cab up to a few different heads a long time ago and remember them sounding harsh and raspy to my ears but, at least with my ultra, this cab sounds very good. I guess it only makes sense, since this was the cab that went with the head.