With my current setup I am running at 2.6 ohms. One 4x10 at 8 ohms and one 2x15 at 4 ohms. I need a power amp. When I saw the 4 ohm minimum in bridged-mono on the QSC RMX1450 it seemed to me all hope of a cheap, well-made power amp was lost. I am looking for something under $400. What do you guys have in mind for a good power amp? Thanks.