When on AV mode, my front speakers, a pair of Dynaudio Confidence C1s (4 ohms) are driven by a separate amplifier, a Plinius 9200 which in turn is hooked to my Yamaha RSV1800 front pre-outs. The rest of my current speakers, Boston Acoustics rated at 8 ohms, are still driven by the Yamaha.
To get a uniform sonical signature, I am inclined to replace my center, surrounds and back speakers with Dynaudios as well. My problem is that Dyns are rated at 4ohms while my Yamaha's manual recommends the use of 6 ohms or higher for the center, surrounds, and back speakers. 4 ohms speakers are only allowed to be used as fronts/main. Considering that I am using an external amplifier to drive the fronts, can this lesser load allow me to safely use 4 ohms for the rest of the channels?