Correct, I have used the .775 amp sensitivity setting, in fact mostly.\nI cannot get the amp to clip.\n\nI mainly use it for music and I've had little luck with surround modes. Presumably because most music is 2 channel? So I use that multi channel stereo button often.\n\nI just hooked up the Marantz to my network and poked around in the settings. Found one for input sensitivity that seems to make things come to life.\n\nHaven't hooked up the Crown yet, but I'm hopeful this will cascade a stronger signal to the Crown.\nMacbook -> HDMI -> Marantz -> RCA\/XLR -> Crown -> Old Telephone Cord -> Polk 60's\n\n (jk) ^\n\n\nYou're using an rca to xlr cable instead of just rca to rca?\n\nWhy old telephone cord? What gauge is that? \n\nWhat gain settings? You have tried max?