Just got my 970 from ebay and am thrilled with it!

I have two set up questions that don't seem to be easy to find when searching the forum....

First, I have set the speaker types to large, but when I go into the system set up and choose Crossover, it reads "none" and won't let me change it. I am using the front panel instead of the OSD as I am not using the 970 for video switching, just audio. As a side note, to enable the OSD do I just run from "monitor out" to the display?

Secondly, I bought an SPL meter and take it the volume should be set to "0", the test tones turned on and the meter at optimal position in the center of the couch.....then use the channel gains to perfect the 75db reading? I am guessing I should set the speaker distances first?


Sean