"Official" Audyssey thread (FAQ in post #1) - Page 1983

+1 Without a separate sub, you'd definitely want to treat the DT subs as the sub (by connecting to the sub out) so something gets the .1 channel . . . so not a "no sub" condition from the receivver's POV, since it can't see, tast, or feel where the things connected to the sub out are placed in the room or whether they're in the same box as some other speaker(s).

Just let me know which course we are taking.

Jeff

 

I’d be obliged if you would delete your two posts please, Jeff.  I will mark the third post (my own) as 'Reserved for FAQ' and then try to figure out how to hyperlink from post to post (which can be done so I am told).  Thanks buddy.

 

EDIT:  I now know how to carry the FAQ over into two or more posts in a transparent and elegant manner. The 'trick' is that the posts need to be on the same AVS page. This means we now have no worries about the length of the FAQ for the future, as I 'own' several consecutive posts after the one we are discussing here. I will move the '101' to the next post which is probably a good idea in itself anyway and which will leave plenty of room for expansion of the main FAQ, if needed.

 

EDIT:

 

For ease of reference, the two posts are:

 

This one

 

and

 

This one

Edited by kbarnes701 - 1/26/13 at 3:55am

I thought that determining the crossover point by a 3db down point was a weakness and this proves it for me. Probably a narrow dip somewhere around 120-150Hz caused the receiver to see that as its roll off. I'm still curious about this so I'll be running more sweeps with less smoothing.
Edited by Theresa - 1/26/13 at 3:27am

 

I'd be very interested in your findings and conclusions. Audyssey does seem sometimes to struggle a little with XOs - the fact that Pro gives you several choices, ranked in order of preference, shows that in the consumer versions there is 'room for manoeuvre'.  The one thing that is certain is that Audyssey will not create correction filters for frequencies below the detected F3 point - this gives rise to the quandry you find yourself in as to what to do about a XO choice that just seems plain incorrect. Do let us know what you discover.

Yes, knowing the speaker is good down to 40 or 50Hz and having the receiver tell me that it needs to crossover at 150Hz was irritating. I had to rerun Audyssey because I moved my R/L speakers slightly when I replaced the tweeter in the right one. A simple boost from the miniDSP resolved the issue. Why I didn't do it right away and instead of running Audyssey many times I don't know.

*I trust that was because you wanted to solve the problem rather than create a workaround. By using the DSP trick you are substituting inaccurate Audyssey EQ in the affected region vs no Audyssey EQ in the affected region. I encourage you in your continued effortss to troubleshoot this. You could "Ask Audyssey" as well.

At least the 4520 is very fast at running Audyssey.

It may be a workaround but what exactly is inaccurate if that region is now closer to the target curve?

I used the miniDSP to impose a curve of 3db-4db and ran Audyssey then I removed the curve after setting the crossover to 80Hz making any corrections by Audyssey in that area inaccurate by 3-4db. If I find that it sounds and measures, with Omnimic, inaccurate I can reimpose the boost.

I'm under the impression that 100--200Hz is the reflections-from-the-front region. At least in my experience, it's a perennial trouble spot that often sees a weird collection of suck-out effects that easily could trigger a -3dB inference, I would think. The standard advice seems to be to move the speakers further away from the wall, or to add absorption behind them.

(I'd be happy with input from someone more knowledgeable than me ...)

Yes it is a troublesome frequency range. Measurement doesn't show any real problem in that range though. I do need some more room treatment behind my speakers although they aren't right up against the wall.

Quick Audyssey question...

I'm going to be setting up my Onkyo 809 today and it uses the Xt version of Audyssey. One of the stps is to set your sub to 75db. I've read through the Audyssey instructions on a receiver that has a lower version of Audyssey and I believe I remember reading to simply set the sub at 12:00 to start and adjust from there.

How would one set the sub at 75 db if they didn't have a sound meter?


Thanks

^I believe your AVR provides an on-onsreen real time indicator to assist that adjustment precisely at that step in the Audyssey Autosetup procedure.

Thanks. Had just opened the box to make sure everything was ok with the receiver and took a look at the instructions that came with it and was wondering about that.

I started with sub at 12 o'clock and it was wayyyyy to high. The wife said what the hell are you doing down there??

 

Don't obsess over getting it exactly to 75dB. Many people prefer to set it to 80dB so that the trims are set a little lower in the AVR - this then gives you room to raise the trims a few dB if you want to to run the subs a little hot. The trims will likely be in the -3.5dB to +3.5dB range after calibration.

 

You may care to read the Audyssey FAQ, linked in my sig, or the '101' also linked there, prior to running Audyssey for the first time. This will give you the best chance of a good calibration 'right out of the box'. Pay special attention the the Mic section of the FAQ.

Quick question about running Audyssey. Do I level adjust the volume first within the speaker adjustments and then run Audyssey? Or do I let Audyssey run and then adjust the speakers? I've noticed when I run Audyssey it sets my LCR speakers to -12 all the time. Heading out now to get a boom mic stand and a SPL meter.

Very informative. Thanks.

quote name="SeaNile" url="/t/795421/official-audyssey-thread-faq-in-post-1/59460#post_22882602"]Quick question about running Audyssey. Do I level adjust the volume first within the speaker adjustments and then run Audyssey? Or do I let Audyssey run and then adjust the speakers? I've noticed when I run Audyssey it sets my LCR speakers to -12 all the time. Heading out now to get a boom mic stand and a SPL meter.[

A -12 L/C/R setting typically results from having your subwoofer gain set too high. Try Decreasing the gain on your subwoofer , and rerun Audyssey - that should result in lower speaker trims and allow Audyssey to properly equalize your speakers . No need to adjust your speakers with an SPL - you can certainly check speaker levels post Audyssey - but Audyssey microphone is usually more accurate than most SPL meters.

Read the 101 and setup guide linked in kbarnes sig above for lota of great info.
All settings in the AVR are ignored during autosetup, so if that's what you mean by speaker adjustments, no. Post a bit more info-type of speakers (Klipsch?) and/or external amplifiers? Post all ch level trims set by autosetup in the processor.

I've read the setup part lots of times and it seems that no matter what I do Audyssey seems to struggle with my setup. Here is a list of my equipment:
JTR Triple 12LF for LCR driven by an XPA-5
B&W DM603s for surrounds also driven by the XPA-5
2 CHT SS-18.2 subs (so that's 4 18" drivers) driven by Crest CC 4000 amp.

I know the JTR's and B&W's are considerably different speakers and I've got a lot of subs too! Post Audyssey run it sounds good but just a bit tame when I know this system should absolutely rock. It puts the JTR's at -12 (all of them) the subs at -12 and the surrounds at about -2.5.

Just bought a SPL meter so I am ready to tweak away!

Post some measurement graphs next time

I will do that. Right now I'm just enjoying videos with it (now that everything is set up again). Measurement and tweaking are just so I can enjoy content.

I see something like that in the 100-200Hz range on my graphs but it doesn't trigger -3dB in this range and it is always detected correctly... Although I have serious problem with Audyssey "correcting incorrectly" frequencies under the real -3dB point...

I have the same issue with the LCR Quintuples. This is a avr/prepro problem with running out of range for the trims due to the speaker high db and with amp wpc. I used a Harrison Labs 12 dB RCA Line Level Attenuator on each interconnect going into the amp. It reduces the signal from the prepro to the amp so the trims can get down around "0" instead of -12. This will let the prepro do a better job with the trim levels.

Does adding the attenuator change the overall volume? Last thing I want to do is tame my system.

Done!

Nevermind
Edited by Prime316 - 1/26/13 at 6:40pm

 

Well, this isn't exactly what you asked for but I was having some issues with my OM test disc output and ended up getting REW with my OM Mic running today.  Here are the results of L+Sub, C+Sub, R+Sub and Sub Only with and without Audyssey:

 

Without Audyssey:

 

 

With Audyssey:

 

 

Obviously, now that I'm using REW, I have the mdat files for these so let me know if you (or anyone else for that matter) is interested in helping me optimize the results!  Thanks again.

 

EDIT:  I should point out that these results are from a new Audyssey calibration with XO on all speakers set to 90 Hz.  Audyssey originally put center channel at 70 Hz, R and L at 90 Hz and surrounds at 40 Hz (which still baffles me as there's no way they're not rolling off above 40 Hz??). Also, graphs are smoothed at 1/24th.

Edited by jkasanic - 1/26/13 at 6:47pm