Audessey and crossover. - AVS Forum
View Poll Results: If Audessey set your front three speakers to large and you are running your system with sub(s), what
Leave them as Large 0 0%
Set them to small with 40Hz crossover 0 0%
Set them to small with 60Hz crossover 1 7.14%
Set them to small with 80Hz crossover 13 92.86%
Set them to small with higher than 80Hz crossover. 0 0%
Voters: 14. You may not vote on this poll

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post #1 of 11 Old 03-25-2013, 06:43 AM - Thread Starter
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If Audessey sets your front three speakers to large and you are running your system with sub(s), what do you do? Why? Thanks.
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post #2 of 11 Old 03-25-2013, 06:52 AM
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Quote:
Originally Posted by tvuong View Post

If Audessey sets your front three speakers to large and you are running your system with sub(s), what do you do? Why? Thanks.

I voted to set to small and cross over at 80 hz, but, you need to try and see which setting sounds best with your system, and, to your ears.

David Lynch Current Equipment: Marantz AV8801, Proceed HPA3, Parasound HCA-1206, Aerial Acoustics LR5's (LCR), Aerial Acoustics LR3's (sides), RBH in-walls (rears), Seaton Submersive, Marantz VP15s1, 106" Carada BW screen, Oppo BDP-103.
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post #3 of 11 Old 03-25-2013, 06:53 AM - Thread Starter
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^^
Totally understood but want to see what most folks do here? Thanks for the vote.
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post #4 of 11 Old 03-25-2013, 07:09 AM - Thread Starter
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Thanks for all the votes. So far, everyone chooses small with 80Hz. Is it because it sounds best or is it because of THX recommendation or both? Thanks.
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post #5 of 11 Old 03-25-2013, 07:14 AM
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It is because 80hz is the point where the bass starts to sound localized; ie., you can tell where the subwoofer is. It is better for blending and for the bass to be non-localized. I'm no acoustics engineer, but, that is the nickel explanation.

David Lynch Current Equipment: Marantz AV8801, Proceed HPA3, Parasound HCA-1206, Aerial Acoustics LR5's (LCR), Aerial Acoustics LR3's (sides), RBH in-walls (rears), Seaton Submersive, Marantz VP15s1, 106" Carada BW screen, Oppo BDP-103.
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post #6 of 11 Old 03-25-2013, 07:43 AM - Thread Starter
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^^
Understand but why not 60Hz? Just want to know. Is it because the sub(s) can do a better job below 80hz and that the receiver does not have to work as hard setting crossover high? Any other reason not crossing over below 80? what is the average/normal frequency range for voice/vocal coming from the center channel? Will there any benefit setting the center at 60 v.s 80hz? Thanks.
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post #7 of 11 Old 03-25-2013, 07:54 AM
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The THX recommended crossover frequency of 80Hz is supposed to keep the sub originated content from being localized and will still allow maximum content at those lower frequencies from the sub thus providing more freedom in placement of the main speakers and the sub to control room modes as much as possible. You may set it to 60 Hz if you want to and think this will sound better as long as the room correction system has recommended a lower f3 (-3db) point of at least 60 Hz or your frequency response will be screwed up in this intermediate area. If your AVR suggest an even higher crossover frequency than 80 Hz, stay with those higher crossover frequencies at least, don't lower it.
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post #8 of 11 Old 03-25-2013, 08:19 AM
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How about for surrounds? My aud set it for 60hz after aud. Should i leave it or turn to 80 hz?

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post #9 of 11 Old 03-25-2013, 08:47 AM
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Its up to you. Do what you like and what fits your personal taste best or what you think sounds better.
To optimize further, i.e. phase and fc, you probably would need measurement equipment and a lot of time and effort, which might not be worthwhile.
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post #10 of 11 Old 03-25-2013, 10:48 AM
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Quote:
Originally Posted by gurkey View Post

Its up to you. Do what you like and what fits your personal taste best or what you think sounds better.
To optimize further, i.e. phase and fc, you probably would need measurement equipment and a lot of time and effort, which might not be worthwhile.

On a second note the 80 Hz guideline has nothing to do with modern electronics, it's just the way a healthy human ear works, i.e. still can hear deep tones but can not localize their source below this frequency. Of course, the 80 Hz is not a brick wall, YMMV. More indepths on the subject can be found in the blog Small vs. Large in my sig. Hope this helps understand the phenomenon behind.
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post #11 of 11 Old 03-25-2013, 10:57 AM
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I set the crossover at 80hz for my fronts, and 90hz for my center - nice to be able to adjust it independently for those who have a center that may not have as good of a lower frequency response compared to the front LR speakers.
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