Originally Posted by Carny_Priest
My experience purchasing Mirage speakers from Vanns.com (very positive):http://www.avsforum.com/avs-vb/showt...8#post19340588
I have a couple of setup issues. I'm powering with an Onkyo TX-SR508. It has Audyssey 2EQ. I know now that the tool does not offer EQ calibration of subwoofers. I have two Prestige S10s in the system. I attempted to use the Audyssey setup to level match the subwoofers by running the tests separately with each subwoofer and then doing the final calibration with both subwoofers on.
The result had the crossover with the surrounds set at 150Hz. The Prestige S10 has spec max frequency response at 120Hz +/- 3db which suggests that I might have a gap if I retain the Audyssey settings.
The other issue is that with the Audyssey settings, bass output seems too low in volume. I can run the test tones and the subwoofer channel is barely audible. Again, I know that the basic 2EQ setup does not provide EQ filtering for subwoofers, but I figured that it would at least match levels with the surrounds.
By the way I don't have a meter. Didn't really want to get one for something I was going to check once, but maybe it's worth the investment.
My center is an OMDC1 and fronts and surrounds are all OMD5s. The L and R fronts are in a bookshelf where I removed the shelves above the speaker to give as much space as possible. These are where they are going to have to stay. I thought I would try again with the L and R fronts placed closer to a sidewall of the bookcase or a little further to the back of the bookcase in order to increase bass response of the OMD5s and lower the crossover to the sub.
This weekend I took another crack at placement and re-calibration.
I put on The Lord of the Rings: Return of the King in DTS-ES 6.1 and trimmed the fronts and surrounds to min levels and subwoofer channel to max level. I selected the track where the Olephants attack and did the sub crawl for each subwoofer. Then I put on some Beastie Boys tracks. My low bass issue had definitely more to do with the source. I primarily watch cable TV and was making my evaluation on the basis of programming I normally watch. Put on a source with a meaty LFE track then there is plenty of bass! The room is not a dedicated space; it's a living/work area where I already have three computer workstations. Placement options are very limited. I wound up not really changing up my previous placement. It was a game of inches. I pulled one speaker a few inches toward the center of the short wall as there was a table leg in front of the driver. I pushed it an inch or two closer to the wall. The other subwoofer I pulled a couple of inches away from a corner formed by the wall and a book shelf.
I used Audessey 2EQ to confirm that the two subs were level matched. I ran the auto setup separately for each subwoofer. Each had a trim level of 0 db. Before final calibration I moved the fronts to the outside sidewalls of the bookshelves and then halfway to the back wall. I toed each speaker in so that they were directed to the main LP. Final calibration from the autosetup with both subwoofers powered up had the crossover set to 100Hz and subwoofer trim at -4db. In theory, I guess this is what I am looking for, to have the fronts and surrounds handling more of the mid-bass and not routing to the subwoofer. Having the trim at -4db at least puts me on the good side if I need room to boost the bass further. I confirmed relative levels by attaching the Audyssey mic to my PC and running the signal through a Windows-based peak level meter that I found online. I compared the center and subwoofer levels by running the AVR test tones with the mic at the main LP. Subwoofer level appeared to be in the same ball park as the center level.
I watched Roy Orbison: A Black and White Night BD and Quantum of Solice BD, and I have to say my untrained ears were pretty satisfied especially if I use decent volume. I probably watch TV at relatively low volume which doesn't help bring out the bass response. I went into the AVR advanced settings and set the reference level adjustment for the cable input to +10db. In theory, that should help. I think this is the best I can do without getting a calibrated meter and spending a few weeks tweaking. In the end, I'd prefer to be a setup and forget it kind of guy, so that I can sit down and enjoy what I have. For jollies, I'll still buy a mic for our iPod Touch and get an SPL app and see how the room responds. Seems like a cheap way to satisfy my curiosity.
If I find our camera I will post pictures of the set-up once I hide my wires.
I hope others find my experience helpful for them.