There's something wrong here. My MB210 by itself can drown out a drumset. Maybe you got a "bad phase" pair?
You could knock it for not liking the tone or the aesthetics, but volume is little hard to knock.
That's how my MB210 is. It was phased wrong when combined with the 210MBE. GK has my combo now working on it. The combo itself has plenty of "guts" by itself to over come a loud drummer.
