Need Advice - Will a 2nd Sub help my situation? - AVS Forum
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post #1 of 7 Old 02-22-2013, 04:59 AM - Thread Starter
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Need some advice from the experts here. I have a dedicated theater room, and recently converted to an AT screen. The space behind the AT screen is somewhat limited: 19" to the wall with a larger opening 45X60 (cutout from the fireplace above) right behind the center of the screen. Current sub (velodyne DD15) placement is on the right theater wall about 6' from the screen. I get good response from this location (verified by my pre-amps room correction software).

I would like to move my sub behind the AT screen. However, when I put in the the cutout behind the screen, I get bad response from as compared to it's original position. There is enough room for two subs in the cut-out. Will a second sub in the same general location help at all with response? If there is a good chance, I'd like to get a second sub so I can have the subwoofer(s) behind the AT screen and free up that front space in the theater. Any thoughts on if this will help??

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post #2 of 7 Old 02-22-2013, 06:53 AM - Thread Starter
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Here is the layout of the room. As noted, sub is currently just in front of the stage on the right.



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post #3 of 7 Old 02-22-2013, 09:19 AM
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If your not getting good response from 1 sub in a specific location, 2 subs in that location is probably not going to help much.

Have you tried your sub in the back of the room? You could maybe put 2 back there and get good response. Otherwise, I would try the second sub on the opposite side of the stage (that door may be in the way though).
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post #4 of 7 Old 02-22-2013, 09:28 AM
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I've had bad experiences with placing subs in enclosed enclaves like that. The subs seem almost non existent. It's Particularly bad with down firing subs. I think it has to do with the distance between the walls being less than the wavelength, but it's just a hunch.
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post #5 of 7 Old 02-22-2013, 09:31 AM
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Quote:
Originally Posted by barhoram View Post

Will a second sub in the same general location help at all with response?
No, you'll just get more of the same. Generally speaking you want a second sub to be as far as possible from the first, so that they excite totally different room modes.

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post #6 of 7 Old 02-22-2013, 10:43 AM - Thread Starter
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Thanks for the replies. So, one possible solution could be one sub in the alcove behind the screen, and a second sub in the back (behind the seats on the right wall there is some space).

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post #7 of 7 Old 02-22-2013, 10:45 AM
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Originally Posted by barhoram View Post

Thanks for the replies. So, one possible solution could be one sub in the alcove behind the screen, and a second sub in the back (behind the seats on the right wall there is some space).
That's what I'd try, though don't be afraid to move the rear sub about to find where it works best.

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