I Recently bought a Emovita 3 channel amp for powering the front 3 channels of my aventage 2080. Main fronts and center.. I am using martinlogan motion series speakers rated at 4ohms. The Emotiva is able to handle 4ohms but the yamaha can only do 4ohms in the 2 main channels but not the surrounds. The yamaha only goes down to 6 Ohms so it is powering the surrounds using 6 Ohms and the amp is powering the front with 4 Ohms. Is this going to be a problem down the road or am I safe as long as I don't blast it at reference levels? The Emotiva does 300 watts into 4 Ohms and Yamaha does 140 into 2 channels at 8 Ohms.