Hi Erik:
I'm still very curious about how your upright is performing with the One10 vs. BB2.
With the BB2, did mention that you like to turn the tweeter "off" to minimize string noise? I'm just getting familiar with the BB2, but suspect the knob is not really turning the tweeter off. It's just changing how the upper frequencies blend with the lower range. For example, I've been playing my Rob Allen Deep 4 fretless (w/Status black nylon tapewounds) and my Reiner Studio 1200 hybrid tube amp set neutral through various settings of the BB2 dial. I presumed it would sound "best" with the dial all the way on (100% to the left). But after trying many positions, the bass really opens up to a sweet spot with the dial at about 4:00, which is roughly 25% in the "on" position. It's stunning how closely this configuration mimics a nice, round, full-sounding upright bass. Really beautiful tone! I'd call it a "Ray Brown" tone but my fretless playing ability is but a micro-spec compared to that particular master player!
So with the One10, there is no tweeter or availability of range above 4kHz. Would you mind giving your upright a whirl with the One10, and then trying it with the BB2's dial @ 4:00 and report the tone of one vs. the other? I would think a lot players would be very interested in versatility of the One10 with upright bass (or an analog with bass guitar). I suspect the One10 is not "bad" but am expecting it to be different due to no tweeter.
Thanks for your consideration - and my apologies for all the questions!