So... I humped the WB100 along to my regular band rehearsal last night. My usual rig is my Markbass LM2 through either my Barefaced Compact (G2) or TKS H115. Last night I decided to push the boat out and bring both cabs! Partly to allow the amp to push out its full power through 4 ohms, and partly just because I could!
Problem was, we were not in our usual room, so the whole set-up and sound was a bit alien. The floor was wooden/laminate rather than the carpet of our usual room, and the arrangement and size were different too. Anyway, to cut a long story short I couldn't get a sound I was happy with in the full band situation Way too much bass for a start (even with the bass control fully anticlockwise). Not enough mids (for me - I do tend to like a very mid-rich tone) and no mid control other than the contour, which reduces them further. Volume was probably sufficient, but my drummer is not particularly hard-hitting even though i think we were louder than usual last night. And that was through TWO quality 8 ohm cabs that are very sensitive. If you play in a proper loud band, I fear that this amp may not have enough headroom - especially if you use a clean sound.
All that said, it was only a 2 hour rehearsal, and we are bedding in a new singer - so I didn't have a huge amount of time to explore the amp's capabilities with my cabs. The core tone was still very nice, but it just didn't wow me like it did at home. I would have liked a bit longer with it, and in our usual room to see if it was me that was the issue rather than the amp, but on the basis of last night's experiences I certainly wouldn't be splashing out around £800 on one of these. Please don't take that as a condemnation of the amp, but rather as a criticism of the testing conditions.
To sum up then - a lovely amp, but just not for me (in this current band anyway).
Thanks for the trial Michael, and I would love to hear how other people get on with this amp!