Thanks for the input. I'm running MF KW Monoblocks with a KWP preamp. Clean controlled power is not a problem. I have a odd room actually 4 interconnected rooms with the main living room having a 25 foot ceiling. Think of several rooms rooms which are probably 15 x 20 extending off a 25 x 20 x 25 room. Lots of air to move with only one anchored corner where one 20T and SW-12 sit.