An in-wall FAST that really rocks - Page 5 - diyAudio
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Old 17th January 2013, 10:34 AM   #41
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tried it. Works ok. Still needs a skin of MDF OR PLY tho.
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Old 17th January 2013, 10:52 AM   #42
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Why is the skin of mdf or ply needed if it seems to work "in-wall" without it? Is this for durability or for acoustics? Do you have any pics of your "Drywall Speakers"? Please psot.
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X
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Old 17th January 2013, 03:23 PM   #43
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I think you'd want at least a wood baffle. I'm suprised I haven't had any issues with resonances. The lower part of the wall is only drywall and isn't braced. But I do have a ton of fiberglass down there so there might not be much energy making it down there. The studs are 2x6 and the rear is also drywall. Not sure the rear matters because, it's out the back. All in all I expected to hear issues but I don't.

It sure makes a difference being "infinite" baffle. No baffle step and very little diffraction going on makes this thing sound very good. I consider myself quite fortunate to be able to do it this way.
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Old 17th January 2013, 09:03 PM   #44
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Quote:
Originally Posted by mondogenerator View Post
tried it. Works ok. Still needs a skin of MDF OR PLY tho.
ive not been clear (after reading this page again). I made a small 8 litre test box, usixg 6mm MDF and plasterboard inner. The lath was about 10mm. It worked rather well. Just glued it together with mastic. It looked abominable
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Old 17th January 2013, 10:15 PM   #45
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Mondo,
Still not clear what you mean. Do you have a picture? Mdf layer on inside, covered with plasterboard. What is the lath for?
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Old 5th March 2013, 02:46 AM   #46
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Quote:
Originally Posted by xrk971 View Post
I'm newhere. I have been looking up this term but can't seem to find anything. What does FAST stand for?
Thanks.
Quote:
Originally Posted by Cal Weldon View Post
Fullrange Assisted Subwoofer Technology
Thanks for clarifying.
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Old 5th March 2013, 03:27 PM   #47
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Quote:
Originally Posted by tuxedocivic View Post
It's a SEOS12 with the DNA-350. It severely needs subwoofer support, but that is a given in Ht anyways. I have an acoustically transparent screen over them.
I don't quite see why you didn't simply use the same setup of your center channel for your left and right channels? It is important to have a unity of tone, in my opinion.
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Old 5th March 2013, 09:18 PM   #48
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I'm getting there. This is all experimentation. Half of what DIY audio is about. I've even already changed to a different speaker altogether. This FAST is disassembled.

I already have the woofers and waveguides. Waiting for a CD to come in and then I'll get to work on a fully matched LCR
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Old 6th March 2013, 03:43 PM   #49
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Mondo,
Still not clear what you mean. Do you have a picture? Mdf layer on inside, covered with plasterboard. What is the lath for?
I dont have pics, as this was before i owned a digital camera.

The lath was inside, not outside. Not that it would make a huge difference.

Basically i lined the 6mm MDF with close fitting lath pieces. I was concerned with cracking the lath otherwise i may have just tried the lath alone.
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