In-ceiling speakers and insulation - AVS Forum
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post #1 of 8 Old 04-13-2006, 09:10 PM - Thread Starter
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I'm about to install in-ceiling speakers in several rooms which have blown-in insulation above the ceiling. What's the best way to handle the insulation? Should I just move the blown-in insulation back on top of the speakers after I install them? Should I lay a piece of fiberglass insulation on the speaker first and then move the blown-in insulation back into place? How are others handling this?

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post #2 of 8 Old 04-13-2006, 10:21 PM
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After cutting a hole and forgetting I had blown-in directly on top, which resulted in a huge pile of insulation on my kitchen floor, I went to the attic, moved it to the side, mounted the speaker, then just moved it back over.

It sounds fine, but your post makes me realize that fiberglass on top may be a better path to avoid any potential ramifications from the blown-in getting into places it shouldn't.

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post #3 of 8 Old 04-14-2006, 07:54 AM
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Quote:
Originally Posted by Mike_W
I'm about to install in-ceiling speakers in several rooms which have blown-in insulation above the ceiling. What's the best way to handle the insulation? Should I just move the blown-in insulation back on top of the speakers after I install them? Should I lay a piece of fiberglass insulation on the speaker first and then move the blown-in insulation back into place? How are others handling this?

Mike_W
Yes, or a back box. Even the Dynamat ones would work, and they're flexible.

http://www.dynamat.com/products_arch...l_dynabox.html
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post #4 of 8 Old 04-14-2006, 10:31 AM
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Back boxes will make the speaker sound better. Short of that, put up some batted instulation behind.
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post #5 of 8 Old 04-15-2006, 10:27 AM
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Mike, if you use Triad speakers (a local company to you) they come fully enclosed. This improves the sound quality as well.
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post #6 of 8 Old 04-22-2006, 11:16 PM
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Does simply enclosing the speaker make it sound better? If the enclosure is small and constricting to the movement of the woofer, I'd guess you to be just as well off with an "infinite baffle" - eh? The cubic volume of the enclosure is an issue in my opinion.
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post #7 of 8 Old 04-24-2006, 10:40 AM
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For best results, the enclosure should be matched to the speaker, which is why I recommended the Triads. However, even a home-made box may help with the problems that in-wall and in-ceiling speakers face like poor bass response, phase cancellation and sound transmission into adjacent rooms. They can also prevent physical damage (ever see an attic after a re-roofing job?).
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post #8 of 8 Old 04-24-2006, 11:40 AM
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Quote:
Originally Posted by tomciara
Does simply enclosing the speaker make it sound better? If the enclosure is small and constricting to the movement of the woofer, I'd guess you to be just as well off with an "infinite baffle" - eh? The cubic volume of the enclosure is an issue in my opinion.
You're right. Each speaker has an ideal/optimum cubic dimension. The manufacturer may actually give you that dimension if you call them.

I frequently create .75 cubic foot enclosures for speakers with 5.25 inch drivers. You might just go with that... we go to .8 cu feet for slightly larger speakers, and go to 1.2 cu feet for inwall subs (two 8" drivers). This is for some Bay Audio speakers, and I call tech support any time I install a new speaker model.

You might try tech support for your speaker, or just try one of the above dimensions. Use dense and heavy material, seal the enclosures, and insulate.
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