Just got my new Onkyo 6.1 receiver as part of my new HT system. I have all new NHT speakers on order. I am using new 14ga Dayton speaker wire. To test the receiver, last night I hooked up my 17yr old ADS mains, 10yr old Infinity center and very low grade garbage radio shack 35W in the rears. As I turned up the volume, (75 digital read-out on the volume) the receiver went into protect mode and kicked off line. This was in a 5.1 surround mode. The music was loud, but not ear drum breaking loud. I repeated this several times in different surround modes and swapped optical to coax cable, same thing. When I went into 2ch mode using the front main speakers only, the receiver did NOT kick off. I got the volume up to over 80 and backed off when the speakers began to distort. I also have the rear speakers on very long length of speaker wire as I haven't cut it to their final length yet. My questions: 1. Am I doing anything wrong? 2. Are my cheap rear speakers the problem? 3. Does the length of speaker wire have any impact on the pwr requirement of the receiver? 4. Are digital readings of 70-80 normal on these new receivers? Thanks to anyone and everyone who can give me any insight into this problem.