Originally Posted by Bob Pariseau
Post the Targets window as well so folks can see the details of what you've set.
Your main problem is with the Subwoofer. First, it appears you have changed the low end Target to "FLAT" -- i.e., the High Pass Filter in the Targets > Advanced settings. The raw output of your Sub (red Measured curve) suggests that's a bad idea. Your Sub does not appear to have good output below 30Hz (not unusual for "everyday" home theater subs that aren't really configured to reproduce bass down in the region where bass is more felt than heard). By setting its low end Target to FLAT you are asking ARC to boost the signal to it down there, even though it can't handle it. As you can see, ARC still protects you in that it won't push more than +6dB of boost -- which is why the green Calculated line has residual error below the black dashed Target line at 20Hz. But still, pushing that much boost into a Sub that can't handle it is not good for the Sub. You can bottom the cone for example, or overheat its built in amp.
The weak output in the low bass may simply be due to the design of your Sub (i.e., you need to consider getting a better Sub), or it may be the Sub is physically too small for the volume of air space in your room -- you have to huff a lot of air to "pressurize" a room at 20Hz (consider a bigger Sub or adding a 2nd Sub) -- OR there may be a settings problem on the Sub. Look for any setting related to Boundary Gain Compensation -- i.e., correcting for a Sub too close to a wall -- and disable that. If there are ports you can open to enhance low bass output do that. If the Sub has a settings choice trading off volume vs. accuracy, switch it to accuracy.
If no luck with settings adjustments on the Sub, then you should spend some time with the Quick Measure tool (ARC's Tools menu) which will give you a real time chart of the raw, uncorrected output of the Sub as you try the Sub at different candidate locations. NOTE: After using Quick Measure you need to re-Upload an ARC solution as it disables the existing one in the Anthem -- if you've moved your Sub you should do the whole thing starting with a new Measurement. Basically what you are looking for is a candidate location which gives you better low bass output. For example, some "servo" subs are known to have problems when placed in a corner. Try shifting them up along a side wall. At these frequencies, even inches matter -- even just rotating the Sub in place. After moving the Sub remember to adjust its Distance setting and also recheck its Phase with respect to the main speakers.
The Quick Measure tool will also give you the fastest answer whether settings changes on the Sub are helping.
Meanwhile, at the high end it appears your Sub's built-in Crossover may be artificially reducing its high bass output. It might still be enabled at, say 80Hz -- perhaps because a "THX" preset is enabled. Since ARC is going to do your Crossover processing, you don't want anything in the Sub artificially limiting its high bass output. So disable the Crossover built into the Sub, or if that's not possible, then crank it up to the highest frequency to get it out of the way as much as possible.
Ideally, you want the Sub to be able to contribute up to 120Hz, which is the top end of the LFE channel.
As for your Main speakers, I think you've been a bit too aggressive in lowering Crossover for LF/RF. The Calculated curve for LF has residual error (i.e,. it is below the Target curve) throughout the region below the Crossover frequency. It is not a big error, but raising the Crossover a bit will eliminate that. Ideally you are looking for a clean Octave (factor of 2 in frequency) below the Crossover setting. That is, if the Crossover for LF/RF is 80Hz you should be checking the match between Calculated and Target for them down to 1/2 of that -- 40Hz. The Crossover rolls into effect over about an Octave, and so you want them to be able to contribute clean output down to there.
It looks like you've got a Room Cancellation Null near 150Hz -- the dip in the Measured curves -- affecting all but Center for some reason. That may be why ARC is detecting a low Room Gain in the room. It may also be that you've got bass treatments installed or that your room is quite large.
Normally, I'd suggest you increase the Room Gain setting to 2dB -- which gets it into the range sound engineers expect for listening rooms when mixing movies. HOWEVER, doing that will require ARC to provide a bit more boost in that problem region near 150Hz. So you need to see whether raising Room Gain introduces residual error in there and compromise a bit. The specific choice of Crossover you pick (raising it up from the 60Hz you have now as suggested above) will have an impact on how clean things are in there as well, so experiment a bit.