"Official" Audyssey thread (FAQ in post #51779) - Page 2639 - AVS Forum | Home Theater Discussions And Reviews
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post #79141 of 79149 Old Yesterday, 06:19 PM
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Originally Posted by mogorf View Post
I don't remember that discussion Mike, but from the engineer's side with solid stage devices the heat build-up (aka warming) should have no effect on SQ. Its just a by-product called dissipation a design engineer needs to carefully take care of during circuit design. Propoerly sized heat-sinks and sometimes additional cooling fans come to mind.

But again, I think it would be a kinda miracle if anyone even with "golden ears" could hear a difference from minute one to an hour long (or even more) operation that could be accounted to this issue, only. Same though goes for power supplies, coz there is nothing "inside" that needs to reach "operational" temperate that would result in better performance.

Thanks, Feri. It's possible that I only imagined that discussion taking place on the thread. I'm capable of that. I did read a discussion of that, in reference to Audyssey, somewhere several years ago, and as I said the consensus was, as you and Selden are suggesting, that it wouldn't really make any difference. I do like your idea of warming-up the filters, though, for maximum efficiency.
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post #79142 of 79149 Old Yesterday, 06:21 PM
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Originally Posted by Selden Ball View Post
Sorry, I have not the slightest idea. One way to find out would be to use a thermometer or other temperature reading device and see how long it takes for the unit to reach a steady temperature. Personally, I've never actually worried about it. My ears are old enough that I don't expect to hear much of a difference.
Let's not forget to specify the MV setting, the type of program material being played, or even a continuous sine wave played for any extended period. And there's the variation of altitude above sea level of our HT rooms, relative humidity, or the inapropriate case when using a non-calibrated thermometer.
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post #79143 of 79149 Old Yesterday, 06:22 PM
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Originally Posted by aaranddeeman View Post
I know. But by giving warmup time, we may or may not gain anything, but will certainly will not lose anything.
So true!
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post #79144 of 79149 Old Yesterday, 06:30 PM
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So true!

If nothing else, Gary and I managed to stimulate some interesting discussion. The next time it gets slow around here, I'm going to tell everybody about the special power cords I'm planning to buy (not).

That will bring the engineers out in droves.
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post #79145 of 79149 Old Yesterday, 06:40 PM
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Originally Posted by mthomas47 View Post
If nothing else, Gary and I managed to stimulate some interesting discussion. The next time it gets slow around here, I'm going to tell everybody about the special power cords I'm planning to buy (not).

That will bring the engineers out in droves.
Power cords also need break-in Mike, so please watch our for your next purchase (or not)!
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Last edited by mogorf; Yesterday at 06:48 PM.
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post #79146 of 79149 Old Today, 12:29 AM
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After sitting back and going through quite a bit of the "Audyssey 101" documentation, and playing around a little, I ran another calibration. Making a little forward progress:

My set-up (5.1 speaker configuration):
Monitor Audio Gold GX100 fronts (42Hz - 60kHz, sensitivity = 88dB 1W@1m)
Monitor Audio Gold GXC350 center (40Hz - 60kHz, sensitivity = 90dB 1W@1m)
Monitor Audio GSFX Gold surrounds (60Hz - 43kHz, sensitivity = 86dB 1W@1m)

Parasound A51 amp
JL Audio F110 sub

Speaker Calibration Details:
Distances
Front L (10.2ft)
Front R (10.4ft)
Center (10.0ft)
Subwoofer 1 (14.7ft)
Surround L (6.4ft)
Surround R (7.4ft)

Speaker Calibration Details:
Level
Front L (-10.5dB)
Front R (-11.5dB)
Center (-9.0dB)
Subwoofer 1 (-3.5dB)
Surround L (-11.0dB)
Surround R (-10.0dB)

Crossover
Front (90Hz)
Center (60Hz)
Surround (60Hz)

Audyssey MultiEQ XT32 = ON
Audyssey Dynamic EQ = ON

Last edited by WestCoastD; Today at 12:32 AM.
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post #79147 of 79149 Old Today, 07:25 AM
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Originally Posted by WestCoastD View Post
After sitting back and going through quite a bit of the "Audyssey 101" documentation, and playing around a little, I ran another calibration. Making a little forward progress:

Speaker Calibration Details:
Level
Front L (-10.5dB)
Front R (-11.5dB)
Center (-9.0dB)
Subwoofer 1 (-3.5dB)
Surround L (-11.0dB)
Surround R (-10.0dB)

Crossover
Front (90Hz)
Center (60Hz)
Surround (60Hz)

Audyssey MultiEQ XT32 = ON
Audyssey Dynamic EQ = ON

That is progress! You got the front crossover to come down a little more, and all of your trim levels are within normal limits now. How do things sound after this latest calibration?
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post #79148 of 79149 Old Today, 02:25 PM
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Originally Posted by mthomas47 View Post
That is progress! You got the front crossover to come down a little more, and all of your trim levels are within normal limits now. How do things sound after this latest calibration?
initial listening (during an HBO movie, DolbyDigital, cable TV broadcast) is very nice, surprisingly dynamic. But this is only a single random source. Will have to experiment with more of an array of sources (ie. BluRay's, music, etc.,...).

For this calibration sequence I set MLP at my normal original location, but significantly below ear-level (precisely 26in high), purposely. However all other mic positions (mic1 - mic8) were set at ear-level height (approx 47in high for my ears). This was the only way to stay within the preferred trim level limit's (especially for rear/surrounds).
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Last edited by WestCoastD; Today at 02:32 PM.
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post #79149 of 79149 Old Today, 06:09 PM
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Originally Posted by WestCoastD View Post
initial listening (during an HBO movie, DolbyDigital, cable TV broadcast) is very nice, surprisingly dynamic. But this is only a single random source. Will have to experiment with more of an array of sources (ie. BluRay's, music, etc.,...).

For this calibration sequence I set MLP at my normal original location, but significantly below ear-level (precisely 26in high), purposely. However all other mic positions (mic1 - mic8) were set at ear-level height (approx 47in high for my ears). This was the only way to stay within the preferred trim level limit's (especially for rear/surrounds).
Hi WestCoastD,

Um, ...I'm not really sure that putting the mic at MLP significantly lower than ear height is the best solution even though you got trim levels within limits. Two reasons come to mind:

1. Out of the 8 mic positions the MLP position will collect data for the Audyssey filter calculation that may not be relevant for the mix.

2. MLP mic setting is a placement from where distances and trims are calculated by MultEQ for ear level listening, but such a low setting may throw off (or maybe not) these measurements.

A couple of pictures of your in-room speaker setup would surely help identify some "best practice" routines in order to get a satisfying calibration.

Just my thoughts!

Last edited by mogorf; Today at 06:17 PM.
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