Interesting, your comment about tone getting a bit thin if the bass is backed off. I experienced the same with my BB2 and GK MB800, it seemed to lack a bit of meat when bass was backed off, but was too heavy on the low end if the "bass" was left at 12 o'clock. I cured this (for me) on the BB2 with a Mesa d800. It can still be bass heavy sometimes if i'm stuck in the corner of a room, but i've found lifting it up on a chair reduces the bass tipup. Thinking about adding a supermidget for slighly less bottom. Like the Vanderkley 210LNT on paper, but it's just a bit bigger and heavier for my needs.