Hello out there in TB land, I just got a gk 1001RB-II. I'm running it through a markbass 210 @400watts and an avatar 112 that I'm told is 400watts and I play an upright with KK maxbass. The problem is that even with the bass frequency on the amp turned all the way down it still overwhelms all the other frequencies. I did not have this problem with my old RB800 and trace elliot 210 cab. Any ideas? Are 12's just not compatable w/upright bass? Is it the amp?