Oh dear, this was a gamble that didn't pay off unfortunately. Last night's gig was a wedding do in a reverberant room. I was stood next to the drummer as usual. Unfortunately the KB12 just couldn't keep up and I was struggling to hear myself all night. I was wondering if I was standing in some kind of dead spot as there was a wall behind me, but I tried moving around a bit to no avail. Darn it. Looks like I should be able to return it and I'm only down the cost of shipping. Be aware, this is not a loud amp though it sounds great at low volumes.