Audyssey MultEQ XT32 + SubEQ HT thread - Page 4 - AVS | Home Theater Discussions And Reviews
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post #91 of 97 Old 11-03-2014, 01:38 PM
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The version provided in this year's Atmos-capable equipment is not exactly the same as the original version. At the very least, when Dolby Atmos-Enabled speakers are in use, it applies a psycho-acoustic frequency adjustment in order to avoid removing the notch designed into the speakers. Whether or not any additional changes have been made is unknown. However, I don't think anybody has actually asked in the official Ask-Audyssey forum on Facebook.

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post #92 of 97 Old 11-03-2014, 03:50 PM
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Quote:
Originally Posted by KurianOfBorg View Post
Has XT32 been improved since 2009? Or is it exactly the same in modern AVRs?
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Originally Posted by Selden Ball View Post
The version provided in this year's Atmos-capable equipment is not exactly the same as the original version. At the very least, when Dolby Atmos-Enabled speakers are in use, it applies a psycho-acoustic frequency adjustment in order to avoid removing the notch designed into the speakers. Whether or not any additional changes have been made is unknown. However, I don't think anybody has actually asked in the official Ask-Audyssey forum on Facebook.

I'm pretty sure there has been no mention of improvements in XT32. Interestingly enough, quite a few of the Denon owners of the X5200 Atmos receiver are obtaining better results than they did with their previous receivers with XT32. Some are coming from previous Denon models and others are coming from Onkyo models, so apparently something has changed. It could just be down to a better mic.
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post #93 of 97 Old 11-03-2014, 04:05 PM
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It's worth noting though that these are all anecdotal reports. Nobody has done a rigorous comparison of measurements from a previous model with XT32 vs. the newer Denon/Marantz models. I don't think we're ready to say definitely that the "new" XT32 is substantively different than what has come before.

I would venture that Chris K would say that nothing has changed -- his stock reply has always been that the basic MultEQ algorithms (or the algorithms for other tech like DEQ/DV) are the same as they've always been. However, that doesn't mean there couldn't be some implementation changes on the part of the manufacturer. For example, when I switched from the 2310CI to the 2113CI, I noticed a signficant change in the volume level with Dynamic Volume engaged. With the older model engaging DV didn't dramatically change the overall volume level -- I would listen at around -35 or -40 for late night listening -- but starting with the 2113 and subsequent models (X4000 and now X5200) engaging DV really boosts the overall volume, so I listen at more like -50 to -55 for late night viewing.

When there IS a meaningful change (e.g. the addition of the Adaptive Low Freq Correction that increased sub resolution from 16x to 128x back in 2007 or so) Audyssey typically advertises it. But they probably wouldn't say anything (if they even knew about it) if there was some change on the manufacturers end in implementation.

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post #94 of 97 Old Yesterday, 07:30 PM
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I have a AVR with dual sub eq and Audyssey XT32 on the way. Do I need to gain match the subs before running?

I'm assuming ill want to tweak the gain knob on subs until Audyssey sets them ideally around '0' after calibration. Anything else I should be aware of?

I will not be able to place the two subs equidistant from MLP. And I only care about one MLP. So do most people do a sub crawl to find the two best sounding positions? Or should I stack them at the best position?

Lastly, since two raises the output, would you typically set the subs output modes to the setting that gives the deepest response on both subs?
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post #95 of 97 Old Yesterday, 10:06 PM
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Originally Posted by DaveyMac View Post
I have a AVR with dual sub eq and Audyssey XT32 on the way. Do I need to gain match the subs before running?

I'm assuming ill want to tweak the gain knob on subs until Audyssey sets them ideally around '0' after calibration. Anything else I should be aware of?

I will not be able to place the two subs equidistant from MLP. And I only care about one MLP. So do most people do a sub crawl to find the two best sounding positions? Or should I stack them at the best position?

Lastly, since two raises the output, would you typically set the subs output modes to the setting that gives the deepest response on both subs?
SubEQ gain matches the subs. Unless they're different models with wildly different gains at the 12 o' clock position on the knob, you shouldn't tweak them.

You can't adjust the speakers' gains such that they're 0 dB after calibration, so why do you feel the need to adjust the subs' gains? The gain relative to the speakers doesn't make any difference as long as it's within the +/- 12 dB correction range of most AVRs. In any case I would tweak the gain knobs such that it's the same as the other speakers after calibration. If the speakers are around -6 dB after calibration I'd set the subwoofer so it's also -6 dB after calibration. The 12 o' clock position on the knob is usually close. This helps when using uncalibrated inputs but is otherwise meaningless.

Just put them in the front corners or rear corners. With two subs, positioning is much easier.

Yes, you should tune it to the lowest output frequency since you'll have the headroom.
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post #96 of 97 Old Yesterday, 10:16 PM
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Originally Posted by KurianOfBorg View Post
SubEQ gain matches the subs. Unless they're different models with wildly different gains at the 12 o' clock position on the knob, you shouldn't tweak them.

You can't adjust the speakers' gains such that they're 0 dB after calibration, so why do you feel the need to adjust the subs' gains? The gain relative to the speakers doesn't make any difference as long as it's within the +/- 12 dB correction range of most AVRs. In any case I would tweak the gain knobs such that it's the same as the other speakers after calibration. If the speakers are around -6 dB after calibration I'd set the subwoofer so it's also -6 dB after calibration. The 12 o' clock position on the knob is usually close. This helps when using uncalibrated inputs but is other wise meaningless.

Just put them in the front corners or rear corners. With two subs, positioning is much easier.

Yes, you should tune it to the lowest output frequency since you'll have the headroom.
Perfect! So no gain or level matching needed. That's awesome! They are hsu VTF3 MK5, so it's like 8:30 to get my one sub under -12db after Audyssey.

I think it's lowest at eq1, 4" port open, so that's what I'll do. And then bump both of them 3-5 DBS on AVR. I should be set!
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post #97 of 97 Old Today, 06:57 AM
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Two subs "interact". You want to place the first sub at the place where it produces the best sound (minimal peaks and nulls) at the primary listening position, then place the second one so it fills in the nulls left by the first. Two sub crawls are essential if your living arrangements allow them. A tool like REW or OmniMic would help a lot since it'd be much more accurate than your hearing. In most rooms, placing subs in the corners are the worst possible locations if you're interested in sonic accuracy. Corner locations result in the re-inforcement of all three of the room's modes. The bass seems louder because those three specific low frequencies (and their harmonics) are made abnormally loud.

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