Originally Posted by Big Tex
Thanks Milt and Bob!
Bob, you're right...it sounds illogical but none the less I want to try. While the mains do show up as performing well in the highs, they also don't have as big an impact on where the microphone is located. As I move the mic further away from each surround, it appears I loose MHz on the highs. Since the mains are directional and always face the mic head on, there doesn't appear to be an issue. The surrounds are flush within the wall and as I move the mic away, the results go to po po. The testing equipment we used allowed us to measure once below the speaker so we could confirm that the tweeter (highs) at least worked.
Quite honestly, I doubt the newer version will make that big a difference but I thought I would try. Who knows?
You guys rock...always there to answer my question. I have another one.
I now have two subs in different corners in the room. I tried running ARC with both subs operating at the same time but it didn't seem to work well. So I went back in and told the Anthem I had one sub and ran ARC. Once ARC finished, I then turned the 2nd sub back on in the AVM and turned the phase on the 2nd sub to 180. The subs are in exact opposite corners (i.e. they face each other- had no choice). So ARC has the main (tested) sub (in front of the couch) at phase 0 and I manually put the other sub (behind the couch) at phase 180. It sounds great. I feel like I had to work around ARC.
Is that the wrong thing to do? In ARC 2.0 should I tell the Anthem I have 2 subs and will ARC figure out they're in two separate locations and determine how to phase them in together or should I do what I did this time and run ARC with one sub and manually phase the other one in?
Additionally, I didn't quite understand where I would need to go to change the crossover? What’s the target’s page; the page in advanced mode? That’s in the ARC software and not on the AVM…right? Please explain how to do this. I assumed I needed to mess with the crossovers in the AVM…guess not….
Thanks EVERYONE for ALL the help! I have tomorrow off so I'll run ARC 2.0 and share the results. I'm dying the see if it makes a difference.
Oh...I just thought of this. In an effort to get more bass (before new subs) I removed the foam port covers on my B&W mains to get them a little lower. It made a 10 Hz difference. Should I put the foam port cover back in the speakers which in theory will create a higher fall off on the highs which should tell the sub to get more bass in the 40 to 50 Hz range or is it in my best interest to keep more lows on the mains? What's the sweet spot for a sub; what Hz range? What would you studs do; foam ports or no foam ports? Please see the graphs below to compare the mains and subs (before and after)
Bob...great recommendation on SVS...they rock and they were cheap. I almost bought the JL113 but the SVS was too good a deal.
Thanks for ALL the help!!!!
PS. If you have any other comments on the new charts (v.1.21) please let me know. I put in new subs, changed the ports on the mains and ported the center channel. I was trying to make it better. Surrounds still suck by ARC standards...
Re-read the ARC related post links in the first post of this thread. You'll find in one or more of those posts detailed instructions for setting up with more than one sub.
Here's a short summary:
1) Go to Setup > Speaker Configuration and specify that you have only 1 sub. This is the necessary setting for use with ARC regardless of how many subs you have. Always specify "1 Sub" if you intend to use ARC.
2) Next set the sub volumes separately. Turn one sub off (at the sub itself -- unplug it if necessary). Go to Setup > Level Calibration. Zero out every line in there. Then set Noise Level to produce 75dB SPL (the LF speaker will be the one playing). Then scroll to either sub line and, leaving that line at 0dB, adjust the volume knob in the still powered sub to produce 73dB SPL (not 75dB). Turn off that sub and turn on the other sub (again, at the subs). Adjust it's volume knob to also produce 73dB. You are done. In combo they'll produce roughly 75dB and they are balance with respect to each other. "Roughly" is close enough.
3) Next set the phase for each sub separately. With only one sub powered at a time, adjust the Polarity/Phase for that sub to best match the LF speaker. Use the phase/polarity controls on the sub itself. You'll need the phase adjustment tones on a calibration DVD -- details are in those post links in the first post of this thread. When both subs are in phase with LF then they are also in phase with each other.
4) Now do ARC Measurement (with BOTH subs powered on). ARC will hear the two subs as a combo and will correct accordingly. This is the only proper way to use ARC with more than one sub.
5) After you do your ARC Upload you should find that 1 Sub is still specified. The speaker volume trim and crossover uploaded for the sub will be the correct values for your combo of two subs.
Do I understand correctly that even your other test gear showed a significant loss of high frequencies from your surrounds whenever the mic wasn't directly underneath them? If so then this is an indication that these speakers, installed this way, aren't going to be able to do the job for you. As currently installed they are too directional at high frequencies -- i.e., what ARC is showing in its charts for them, sad to say, is correct.
The way you adjust crossovers (and you really shouldn't have to do this) is to open your saved file of Measurements in ARC Advanced mode and bring up the Targets window. You adjust the "cutoffs" shown there and ARC takes care of the crossovers based on that.
Do not fiddle with the crossovers in the Setup menu after ARC has Uploaded results. The crossovers it Uploads must be paired with the room correction results it also Uploads. Make changes, if you must, in the Targets window in ARC. Accept those changes (which dismisses the Targets window), re-Calculate and re-Upload.
ETA: Note that with the new ARC, V2.0.1, the Uploaded crossovers may end up being different from the "cutoffs" you set in the Targets window. This is normal and correct.
The porting issue on your main speakers is tough to predict. I would start with the speaker maker's recommended "default" configuration and only change from that if you decide you don't like what ARC does when they are set that way.
I'm afraid I can't tell by your description what these two sets of charts are supposed to be showing, but the way you set up the two subs separately invalidates the bass in these charts anyway. So you'll need to try again following the two sub procedure I outlined above (more fully described in links in the first post).