I have a question about this set up for upright, but I would like to preface it with a comment. I COMPLETELY understand the subjective nature behind asking the question of "how will this set up sound with my particular bass" and how that is nearly impossible to determine without the intimate knowledge of that particular piece of wood with strings. Now, I know what to expect having owned EA cabs and amps before insofar as general tonality and accuracy, but I really would like the input of any bassists who have experience with the avalon DI, whether live or in the studio. By the way, this consideration is only on the consideration of portability because I have tried a DB 680 preamp through the wizzy powered 12 and the sound was amazing. Tube can be just as accurate as anything else when paired with the right projection and power. The combo of the warmth and fullrange clarity sounded miles better to me with my gut strung Kay acoustic than the preamp section of the Iamp 800 did. IMO. Thanks in advance.