Are Linacoustic and Duct Liner the same? - AVS Forum
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post #1 of 54 Old 11-28-2006, 08:36 PM - Thread Starter
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I went to our local Heat/Air company today and asked about linacoustic. He showed me 1" "Ductliner" . It came in a roll 4' wide. He quoted a 100' roll for $260. Is this what I need for sound absorbtion on the front wall and up to ear level on side walls or is linacoustic something different?

Thanks,
Matt
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post #2 of 54 Old 11-28-2006, 10:05 PM
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That would be it. though I believe it is available in 2" as well but maybe someone else can comment on that part.

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post #3 of 54 Old 11-28-2006, 10:49 PM
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1.5" and 2.0" but anything over 1.5 would be to absorbent. I would suggest 1" or 1.5". As for the price that's about what I paid for a 1" 100' roll, $285 Linacoustic RC Black.

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post #4 of 54 Old 11-29-2006, 12:10 AM
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Linacoustic is a type of duct liner.

Check the brand of what he is offering. Look at the absorption coefficients of Linacoustic and compare then to what he is offering. If they are somewhat close, then it will work as a substitute. Here is a list of a bunch of coefficients put together by one of our AVS members:

http://www.bobgolds.com/AbsorptionCoefficients.htm

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post #5 of 54 Old 11-29-2006, 03:29 AM
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When I went to buy Linacoustic they were out, but had Linatex which had the same Absorption qualities as Linacoustic. Works the same, price is the same. They are all duct liner.


Randy
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post #6 of 54 Old 11-29-2006, 08:50 AM
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Quote:
Originally Posted by mccabem View Post

I went to our local Heat/Air company today and asked about linacoustic. He showed me 1" "Ductliner" . It came in a roll 4' wide. He quoted a 100' roll for $260. Is this what I need for sound absorbtion on the front wall and up to ear level on side walls or is linacoustic something different?

Thanks,
Matt

Yes, same stuff, but man he's bending you over for it. I paid about half that for the same size roll.

If you are in the Northern VA area (or anybody else for that matter), who needs some, I still have about 75 feet on the roll that I need to get out of my garage...

-Steve
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post #7 of 54 Old 11-29-2006, 02:55 PM
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I'm in Austin, TX and have 8 sheets of the 1.5" thick Linacoustic R300 fiberglass I'm not using. That would be 8 sheets which are 48" by 96".
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post #8 of 54 Old 12-04-2006, 12:37 PM
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New guy here (as far as these details go anywho...). Was going to start a new thread but this seems appropriate enough.

I did some searching and think I understand but can someone tell me if these descriptions are correct?

Linacoustics / Duct Liner = You put this on the front wall (Screen-wall) against the drywall or whatever to absorb sound which minimizes unnessessary echos. You also put this on the side walls to seated ear level for the same reason.

GOM = Guilford of Maine. This is just an accoustically transparent fabric that is fire treated that comes in many colors and is basically there to look pretty over the other materials you use.

Cotton Batting = Used above the linacoustics on the side walls. Not sure why, as best I can figure it's to only slightly dull echos without making the room sound dead or anechoic?
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post #9 of 54 Old 12-04-2006, 01:35 PM
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The Linacoustic is a sound absorber, the cotton batting on walls above ear level is botht he maintain depth for those that are doing the whole wall floor to ceiling and to Difuse sound rather than absorb it. both are good things, each in it's place. you can also only treat part of a wall and leave the top half as regular wall.

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post #10 of 54 Old 05-03-2007, 08:38 AM
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Here is my setup. What kind of room treatment do I need?









I don't have too much money to spend. Even though I just bought the Harman Kardon receiver just now, I still feel that sometimes the sound is too bright. I think room treatment will help, but don't know what to do.
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post #11 of 54 Old 05-03-2007, 10:05 AM
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bommai:

Your pictures are very pretty, but absolutely USELESS when it comes to acoustic treatments. The shape of your room, where the doors and windows are (and how many of each), what sort of construction was used in the floors above and below, what you expect to accomplish with treatments - THESE are the sorts of things that will help in determining your treatment needs. You'll also need to elaborate on why the room sound is a problem now - "It's a little bright" doesn't provide much information.

Oh, and how much you want/are able/can sacrifice to spend will also matter.



Your pictures are kind of like posting a picture of a car and saying "Here's my pretty car. How do I make it go really really fast?". No help at all.



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post #12 of 54 Old 05-03-2007, 12:09 PM
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drin - thanks for the feedback. These are the pictures I already had and just came across this particular thread. I did not really think about treatment before. I made a quick drawing our our basement. I don't have the exact measurements right now but this is what I came up with using Visio.



Hope this helps!! The L-shaped room is pretty wide open. The beams I notated in the diagram are just beams on the top. I have the rear speakers mounted on them. The room is fully finished with drywall and the ceiling is finished too.

I would like feedback on how to acoustically treat the room. I am not getting really good sound stage for music. After running EQ on a Harman Kardon AVR 645, while listening to music, the highs are a little too shrill. I have never done room treatment before.

Here is my gear:
TV: 61" HD-ILA P61R1U
Receiver: H/K AVR 645
Sources: PS3, Sony HD-DVR
Center channel: Klipsch RC-7
Fronts: Klipsch RF-5
Rears: Klipsch RS-35
Sub: Klipsch RW12
Seated position to TV is approximately 9-10 feet
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post #13 of 54 Old 05-03-2007, 12:34 PM
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Quote:
Originally Posted by Don_Kellogg View Post

1.5" and 2.0" but anything over 1.5 would be to absorbent. ...

According to whom...?

The thickness of the material will determine how low in frequency the absorption will affect. The thicker the absorber, the lower the frequencies. Many times you will want/need 2" or greater thickness absorbers (I have some walls with 3-12").

The amount of surface area with absorption will determine whether or not its "too absorbent" from a high-frequency standpoint, not the thickness. If you find that you need the thicker absorbers (to tame the lower frequencies) and that they give you too much high frequency absorption, you can cover the surface with a thin, reflective material to let the highs bounce off while still absorbing the lows.
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post #14 of 54 Old 05-03-2007, 12:48 PM
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I would get those rears out from the back wall. There are various acoustic foams and mats that you can buy to hang in various spots in your room. Have you tried looking at the acoustic treatments master thread at the top of this forum? It is unfortunately very long and full of infighting but stuck in there is also a LOT of useful information. certainly is a good place to start learning some basic stuff.

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post #15 of 54 Old 05-03-2007, 01:34 PM
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McCall - the rears are on a beam facing the TV. They are not mounting on the rear wall. The rear wall is all the way back 18 feet behind the rear speakers. I will look into the acoustic coverings.
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post #16 of 54 Old 05-03-2007, 02:55 PM
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Tough room.

I would treat (deaden) the display wall, floor to ceiling, and place a series of absorbent panels along the long wall, starting with first reflection points. Experiment with placing panels on the rear wall also.

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post #17 of 54 Old 05-03-2007, 03:46 PM
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Bommai - your question is a bit of a thread jack so you may want to start a new thread to allow people to get back to the Linacoustic discussion. With that being said, you can find great free software here to determine the reflection points in your room.

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post #18 of 54 Old 05-03-2007, 10:43 PM
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drin - thanks. I apologize for the thread hijack. That was not my intention.
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post #19 of 54 Old 09-07-2007, 09:14 AM
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Just picked up 100' of 1" black Duct Liner and have a few questions, please!

1. Can I or should I double the DL on the screen wall to make it 2"?
2. Now that I think about it, I am using an electric 106" Gray WolfII that is not AT, should I be treating my screen wall?

Your help is appreciated,
Joe
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post #20 of 54 Old 09-07-2007, 09:32 AM
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Quote:
Originally Posted by jkreidler View Post

Just picked up 100' of 1" black Duct Liner and have a few questions, please!

1. Can I or should I double the DL on the screen wall to make it 2"?
2. Now that I think about it, I am using an electric 106" Gray WolfII that is not AT, should I be treating my screen wall?

Your help is appreciated,
Joe

I did on both counts
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post #21 of 54 Old 09-07-2007, 09:50 AM
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Quote:
Originally Posted by BIGmouthinDC View Post

I did on both counts

Thanks DC.

Any suggestions on covering the DL? I was going to screw directly to wall, and possibly place some thin rolls in front corners for Bass Traps,.....
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post #22 of 54 Old 09-09-2007, 06:41 PM
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ALlright, I did the DL. So far here is what I have.

1" covers screen wall completely, 12WX7.5H, I doubled lower 47.50" to 2" thickness.
1" covers side walls out 47.5" by 7.5' H

I painted fender washers black and used 2" DW screws, the Wife thinks I am ruining the Theater. Any suggestions on covering the front wall and partial sides with cloth?
thanks,
Joe
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post #23 of 54 Old 09-10-2007, 06:44 AM
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Quote:
Originally Posted by jkreidler View Post

ALlright, I did the DL. So far here is what I have.

1" covers screen wall completely, 12WX7.5H, I doubled lower 47.50" to 2" thickness.
1" covers side walls out 47.5" by 7.5' H

I painted fender washers black and used 2" DW screws, the Wife thinks I am ruining the Theater. Any suggestions on covering the front wall and partial sides with cloth?
thanks,
Joe

GOM is the standard (search in here on that) but you can probably use just about any suitable cloth for this purpose.
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post #24 of 54 Old 09-10-2007, 09:26 AM
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Quote:
Originally Posted by jkreidler View Post

I painted fender washers black and used 2" DW screws, the Wife thinks I am ruining the Theater. Any suggestions on covering the front wall and partial sides with cloth?
thanks,
Joe

Make some fabric frames





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post #25 of 54 Old 09-10-2007, 09:48 AM
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Can i wrap fabric arount these linacoustics and use them as wall panels?
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post #26 of 54 Old 09-10-2007, 10:21 AM
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Quote:
Originally Posted by rsprance View Post

Can i wrap fabric arount these linacoustics and use them as wall panels?

You'll need the rigid version (OC 703) to do that. The Linacoustic is a roll of pretty flexible material. You still will probably want some sort of frame to protect the edges, though. Look for G Powers great thread on making frames.
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post #27 of 54 Old 09-10-2007, 10:52 AM
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What have most people paid for their 1" Linacoustic? I've found it for $287 so far but swear I've read that people have bought it for less than $200 a roll. When I contacted my HVAC supplier, they didn't have it by name, but the duct liner they sold was $416 a roll! I double checked and it was the standard 4' x 100' x 1", so obviously that isn't a good choice. Just wondering if I need to keep looking, or revise my budget for the insulation.
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post #28 of 54 Old 09-19-2007, 02:02 PM
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I got a roll of 47.5" X 100' for $186.00 from Johnston Supply in Cincinnati, but I called first and begged. They typically only sell to HVAC contractors.
Joe
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post #29 of 54 Old 09-20-2007, 07:58 AM
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Can i put this stuff against the studs and then cover it with drywall?
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post #30 of 54 Old 09-20-2007, 08:05 AM
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Quote:
Originally Posted by rsprance View Post

Can i put this stuff against the studs and then cover it with drywall?

Why? Are you saying you want to sandwich the linacoustic between the stud and the drywall or just fill the space between the studs.

In either case there really isn't any reason to use this product for that purpose.
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