Axiom Home Page Forums General Discussion Home Theater Adjusting Speaker Levels On Yammi 1300

I recently bought the Radio Shack SPL meter (digital). I have the Epic 60 system and a Yamaha RXV 1300 receiver. When I started the test tone generator I found that I could not adjust the levels of the main speakers (the manual confirmed this) - I could only adjust the center and the surrounds using the Yammi. Also, I had to select 60 db on the meter since it would not register the sound from the mains at 70 db. The mains were at about 63 db so I adjusted all speakers to match that level (I used the volume control on the bass to adjust it). Will this give me optimal results or is there a way to fool the receiver into allowing me to adjust the levels of the main speakers?

Thanks.