Originally Posted by yacht422
however, regarding the sub setting, you made me stop and think! i set the 'noise' at +4(prox) per anthem recommendation - however, i still set the subs to 75 dB. Not certain if there is an interconnect there. i'll remeasure setting the subs to 65 db and see what happens. for others in the group that have the 65 db issue - - where do you set your sub(s) in the measurement process??
Ben has given you the textbook answer. Even if you have to raise your 'noise level' to +10 you should try to get it to 75db on your spl meter. Then set your sub to 75db using its own gain control knob. Be sure, as Ben said, to zero out the LF and SUB speaker level in set-up (or zero all the speakers). The only adjustments are made in 'noise level' in the Anthem set-up and your sub's own volume knob.
After running and uploading ARC, your uploaded speaker levels should be within a few db of each other.
I am afraid that if you set your speaker 'noise level' and sub level to a 10db difference that ARC may not be able to compensate for the difference in the speaker levels. I'm not sure what the maximum amount of correction that ARC can apply in your SPEAKER LEVEL settings, but if the amount of correction needed is more than ARC can apply you won't be getting a true ARC correction.
The second best solution would be to lower your sub's volume to match the SPL reading at whatever db the 'noise level' is reading at the +4 level that Anthem suggested.
But if you can get your 'noise level' to 75db (even if it takes +10) and set your sub to 75db, I think this will give you the most accurate ARC reading.
As Ben said, it does not matter what the ARC graph shows. I guess I'm lucky that mine shows @75 db, but if the line tracks along 85db or 65db its no big deal.
I do think its a good idea
to set your 'noise level' and sub to 75db if possible.I do think its a big deal to set your 'noise level' and sub level to the same db level.