@Bassman Steve
I've tested the combo with all settings neutral, no compression. Passive P-bass, Lo input. The sound is tinny and slightly distorted. Distortion becomes worse after a few minutes of playing and stays distorted. If I roll of the highs on the bass the distortion increases. If I plug in my earphones in the phones output the sound is fine. I love it! Same if i use the unbalanced DI. If I use the speaker again, the sound is distorted again and distortion increases with time. I've tested the speaker on my Markbass amp and it sounds fine.
It would be great to get advise from Stewart Ward.
Grtz, Cyril