7.1 rear L& R aiming - AVS Forum
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post #1 of 17 Old 08-19-2012, 03:05 PM - Thread Starter
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My rear surrounds are set up about standing height. Should I aim them in and down at the listening or just in and let them fire over the listening area. I've read many different opinions. They are direct firing bookshelves.

Edit: I should mention they are about 16 feet behind the seating area.

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post #2 of 17 Old 08-19-2012, 06:03 PM
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Guessing from what you mentioned probably just let them fire straight. No toe in or aiming down if that is what you mean. You could always try different configs and see what works best also.

butter and jelly please.
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post #3 of 17 Old 08-19-2012, 06:15 PM - Thread Starter
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Yeah that's what I was referring to. Thanks for the input.

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post #4 of 17 Old 08-19-2012, 10:53 PM
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I would point each rear speaker at the listener on the opposite side of the seating. So the right rear speaker would be aimed at the listener sitting on the left end of the couch. This won't affect the listener sitting in the middle, but will help minimize the volume level difference of the rear speakers for listeners sitting on either side.

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post #5 of 17 Old 08-20-2012, 07:08 AM - Thread Starter
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You'd aim them cross firing?

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post #6 of 17 Old 08-20-2012, 12:50 PM
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Quote:
Originally Posted by Lastyear4gt View Post

You'd aim them cross firing?
Yes. Speakers are typically loudest on-axis (pointing directly at you), and start getting quieter as you rotate them off-axis (away from you). Likewise, speakers sound louder when they are closer to you, and start getting quieter as you move them farther away.

If both your rear speakers were pointed directly forward, then the listener on the left side of the couch will be dominated by the sound of left rear speaker, for two reasons: it will be on-axis (pointed directly at his head) AND closer to him than the other rear speaker. Double whammy.

However, if you point that left rear speaker at the listener on the right side of the couch, then you trade off some of the energy of the closer speaker by hearing it attenuated off-axis. Even better, the rear speaker that is farther away is pointing directly at you, compensating for the distance by hearing it louder on-axis.

For the listener seated in the middle of the couch, both rear speakers will be equidistant and sound balanced. It is the listeners on either side that will thank you, for having a more balanced rear soundstage (by keeping the nearby speaker from dominating). You might want to consider this for your side speakers as well, if they are mounted above ear height.

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post #7 of 17 Old 08-20-2012, 03:12 PM - Thread Starter
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Interesting idea. I'll give it a try. I cannot however apply this to the side speakers as they are dipole speakers. Which leads me to another question. They have a selectable switch. Should I have them set to bipole or dipole?

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post #8 of 17 Old 08-20-2012, 08:32 PM
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Quote:
Originally Posted by Lastyear4gt View Post

Should I have them set to bipole or dipole?
IF they are so close to the listeners that their direct sound will be distracting, then set them to dipole (so that the listeners are sitting in the null). Otherwise, I would set them to bipole.

Sanjay
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post #9 of 17 Old 08-20-2012, 08:48 PM
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Quote:
Originally Posted by sdurani View Post

Yes. Speakers are typically loudest on-axis (pointing directly at you), and start getting quieter as you rotate them off-axis (away from you). Likewise, speakers sound louder when they are closer to you, and start getting quieter as you move them farther away.
If both your rear speakers were pointed directly forward, then the listener on the left side of the couch will be dominated by the sound of left rear speaker, for two reasons: it will be on-axis (pointed directly at his head) AND closer to him than the other rear speaker. Double whammy.
However, if you point that left rear speaker at the listener on the right side of the couch, then you trade off some of the energy of the closer speaker by hearing it attenuated off-axis. Even better, the rear speaker that is farther away is pointing directly at you, compensating for the distance by hearing it louder on-axis.
For the listener seated in the middle of the couch, both rear speakers will be equidistant and sound balanced. It is the listeners on either side that will thank you, for having a more balanced rear soundstage (by keeping the nearby speaker from dominating). You might want to consider this for your side speakers as well, if they are mounted above ear height.
How about doing this for front L+R speakers to improve the sweetspot?
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post #10 of 17 Old 08-20-2012, 09:11 PM
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may be worth checking this out...

http://libinst.com/PublicArticles/Setup%20of%20WG%20Speakers.pdf

hope it helps

It's for 'wall hung dude', and no, I don't need any help to 'hook-up'.... sheesh ... dirty minds around these parts....
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post #11 of 17 Old 08-20-2012, 09:11 PM
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Quote:
Originally Posted by Skylinestar View Post

How about doing this for front L+R speakers to improve the sweetspot?

I have seen that kind of toe in recommended to avoid a big first reflection of the side walls and to indeed give a wider sweet spot. I tried it and didn't like it, I toe in so that the mains are pointed right at me.
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post #12 of 17 Old 08-20-2012, 09:12 PM
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Quote:
Originally Posted by wlhungdude View Post

may be worth checking this out...
http://libinst.com/PublicArticles/Setup%20of%20WG%20Speakers.pdf
hope it helps

Beat me to it, that's exactly what I was referring to.
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post #13 of 17 Old 08-20-2012, 09:39 PM
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Quote:
Originally Posted by wlhungdude View Post

may be worth checking this out...
http://libinst.com/PublicArticles/Setup%20of%20WG%20Speakers.pdf
hope it helps

great read, thanks
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post #14 of 17 Old 08-20-2012, 10:01 PM
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Rives Audio's site helped me out. I was in need of some help with proper placement of my front mains and the "resources" link had a shload of links, concepts, formulas, and geek reads that would allow a deaf person to dial in the most complicated system.
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post #15 of 17 Old 08-20-2012, 10:45 PM
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^ do you have a link?
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post #16 of 17 Old 08-21-2012, 01:50 AM
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Quote:
Originally Posted by Skylinestar View Post

How about doing this for front L+R speakers to improve the sweetspot?
Won't improve the sweet spot since it is intended to make the soundstage more consistent for listeners on either side of the sweet spot. Definitely worth a try to see if you like it.

Sanjay
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post #17 of 17 Old 08-21-2012, 09:57 AM - Thread Starter
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Quote:
Originally Posted by wlhungdude View Post

may be worth checking this out...
http://libinst.com/PublicArticles/Setup%20of%20WG%20Speakers.pdf
hope it helps

That was an interesting read, makes alot of sense. I'm gonna give it a try.

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