Originally Posted by Biff66
All the levels are way up. Subwoofer that was +3db on ARC-2 is now +12! Not sure what happened there.
The gain trim values being different doesn't mean anything. What matters is that all the channels are well balanced afer ARC is done. If you open the speaker level setting menu and step the noise through each speaker, they should all be darned close. Do you have an SPL meter?
I will tell you when I played the opening scene for the new Blade Runner I thought the walls of the house would fall down and was scrambling for the volume control. I also heard what sounded like woofer slap so I immediately turned it down.
Sounds about right. That movie has prodigious bass in the opening.
What was the volume control set for before you turned it down? From your graph it looks like ARC targeted 75 dB, and if I understand Anthem SPL logic, that means -10 on the master volume would be full cinema reference level. If you play Blade Runner at MV = -20 it should be loud but not lethal. If you want the MV to use 0 as reference, manually subtract 10 clicks from every level trim -- but only if all of them are able to do so. Here again it would be great to have not only an SPL meter but also a known test signal to measure. Then you can be certain what SPL is being produced.
I am running two M&K push pull X10 THX subs which load the room very nicely but have a weird curve. There is a 70 db hump at 750 Hz and another one at 1.2kHz. Anyone heard of a sub generating sound at these high frequencies? Measurement thumbnail below.
Yes, the curve is very weird. But there are no 70 dB humps.
More like 7 dB. But those are the least of your worries wrt the subwoofer.
The M&K's do not have correction software and were set to THX level and crossover off.
Turn the crossovers back on, and set them for 80 Hz. Do it. This will help reduce the massive peak at 160 Hz, and also reduce the resonances at 750 Hz and 1.2 kHz. None of that is useful. Run ARC again and see what you get.
I have not seen the overall responses of the mains or what ARC is doing for correction, but I suspect there may be similar significant resonances present. Putting speakers in a cabinet is a great way to cause such problems. The usual solution is to seal the gaps all around the front baffles of the speakers to the side/top walls of the cabinet with something resilient. It may or may not cause heat buildup from the woofer amps, though.
Deadwood II Theater
(Previous Deadwood Theater HTOM
Anthem AVM 60 7.4.4; Classé SSP-800 PLIIx 7.4; MiniDSP OpenDRC-AN
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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"