I've been using an MB200 for about a year. Last night I picked up a BDDI. I haven't experimented with the latter yet, but I'm anticipating using it as a preamp into the effects return of the MB200, so that the GK is functioning only as a power amp. (This is because I need more midrange grit than the MB200 provides, but it does provide nice clean power, at a good level for small clubs.) My question: In the past, when I've used a preamp into a "real" power amp (Crown, QSC), the rule of thumb has always been to crank the level of the power amp all the way up, and control the volume with the preamp. Should I do this with the MB200/BDDI combination? My main concern is to avoid frying anything. I can hear when things are distorting, but I don't want a situation where I plug something in and curls of blue smoke immediately start to appear. Thanks in advance!