Originally Posted by desray2k
That’s my question too...I think ARC Genesis applies its own calibration level at the onset. I doubt user can make any pre calibration adjustment to ensure 75db is the system wide targeted calibration level. Correct me if I’m wrong. Still working so unable to confirm at this stage.
I have a feeling it’s a bug that need to be fixed?
I don't see it as a bug, because Anthem makes no claim that all speakers will be calibrated to 75 dB. Maybe I missed it. And previously, I was told that they aim for MV= -10 to be 75 dB (for a -30 dBFS signal), which is 10 dB hotter than normal.
Anyway, there are two things that affect the final SPL target ARC chooses: the greatest difference in output between the speakers, and perhaps the mean (the value mid way between the extremes). I say perhaps because it might well be a value a bit lower than the mean because the EQ stage has more cut than boost available. Anyway, you get the idea.
The subwoofer, being the wildest card in the deck, can easily throw things off so if you have already balanced the system, look at the gain settings for the main speakers. Find the lowest and the highest. The subwoofer needs to fall somewhere between them. Otherwise ARC has to dance to find a target that will enable both the EQ corrections and gain trims to hit a common SPL.
If you have some speakers that have significantly different levels than others, like more than a 10-12 dB difference, that is taking away from ARC's degrees of freedom. Trouble is, there's not all that much one can do as, except for subs, amps usually have no level adjustments. One can sometimes switch from XLR to phono and drop 6 dB, or insert a passive attenuator in line. Not very precise.
Deadwood II Theater
(Previous Deadwood Theater HTOM
Anthem AVM 60 7.4.4; Classé SSP-800 PLIIx 7.4; MiniDSP OpenDRC-AN
Oppo UDP-203; Oppo BDP-93; Win7 media PC w/Roon+Kodi; Roku Ultra; DirecTV Genie
Adam Audio S3V/S3H LCR, KEF Ci200QS 4 srrnd, Tannoy Di6 DC 4 hts, Hsu ULS-15 4 subs
JVC RS520; Stewart Cima Neve screen 125" diag 2.35:1, MLP at 115"