Quick question 1st time setup Onkyo Audyssey

[Collectors Set]

OK -- good idea...I just unplugged the sub and made sure the terminal posts on the receiver were nice and tight on the back surround left inputs. And still nothing. It then prompts me to either retry or cancel.

Wonder if I used them as Surrounds instead of Surround rears. Would they still be in play for like a 5.1, or should you only use the surrounds in a 7.1 scenario. In other words is there a priority of order you should follow between these two pairs??