Interesting. I'm very curious to know what preamps folks are using for upright with the Quilter : My upright is equipped with a Realist, and straight in the front end of the BB it doesn't sound convincing. The answer might be as simple as slapping a 10-band EQ pedal (just a high-pass was not enough for me) in front of the amp to tame some of the frequencies ? I don't know.
Once I've settled on a cab (or cabs) to pair with the BB, I'd really like to make it work for my upright, too. The PJB Suitcase sounds fantastic, but if I could do it all with just one setup it'd be great - I really wouldn't mind freeing up some space in my office/studio/lab!
In other news, I'm test driving an Audio Kinesis cab on Monday!