I have a Marantz SR7300 (105wx5) pushing B&W 604 mains, 600 center, and 601 rears. I just added a Rotel RB-1050 (70wx2) into the mix...it is now powering my two mains while the Marantz is doing the rest. I thought that after setting this up, I would notice some level of eased strain on my Marantz, i.e. it would sound louder at lower volumes due to the increase in power to the entire mix. I'm not sure if I've lost my mind or what, but it seems that I have to turn it up even louder than before to get the same perceived volume. Any thoughts?