I owned an AD200 for awhile - awesome amp. The only reason I sold it was because I couldn't get the high-end bite out of it that I like. Aside from that, the AD200 sounds incredible and is extremely light for a tube amp with this kind of power. I really dug the gain knob - it adds a thickness to your tone in a very responsive way (not an overdrive/fuzzy gain - it still keeps an edge). FWIW I played mine through a 4x10.
