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  1. #1

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    Thumbs up Just finished my DIY acoustic corner panels

    Our new basement had a really nasty snap echo in one end that was really screwing up the sound of my SDA's. There is a boxed in support beam that creates a small rectangular area in the ceiling as seen in the attached pictures. It was annoying to talk in this end of the room much less listen to music.

    I found a product called Corner Busters (http://www.echobusters.com/cornerbusters.html) that claims to correct such problems. I temporarily stuck throw pillows in the corners just to see if this would work and sure enough the pillows helped. The Corner Busters seemed like the ticket but they are $190 plus s/h for a 4 pack!

    Plan B - I found a company called ATS Acoustics (atsacoustics.com) that sells all the stuff you need to make your own. I bought a sheet of 1" thick Owens Corning 705 for $18.80 + $9.94 shipping = $28.74. The local fabric store had a good selection of canvas and I picked up 2 yards for around $15. Home Depot had 3m Super 77 spray adhesive for around $14. I built 4 for less than $60! Owens Corning 703 is cheaper and it may have been just as good but I only needed one sheet.

    They work - No more echo!!!! The annoying mid/hi frequency echo is gone and the bass sounds much tighter.
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    SDA 2B-TL (Sonicap/Solen/Mills, Erse Super Q, Rings, Spikes, No-Rez)
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  2. #2

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    Nice job; they look great!!!
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  3. #3
    GV#27
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    Nice work Stew.Have you thought of building some panels for the side walls.Those SDA's might benfit from having some absorbtion at the first reflection points.

  4. #4

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    Very nice job. Congrats

    engtaz

  5. #5

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    Quote Originally Posted by GV#27 View Post
    Have you thought of building some panels for the side walls.Those SDA's might benfit from having some absorbtion at the first reflection points.
    I've thought about making one for the right side wall. It's 3' from the speaker where the left side wall is 6-1/2' from the speaker. The imaging sounds bigger on the left side and I've wondered if a panel on the right would help.

    We haven't hung up pictures in our new house yet and my wife has a tapestry from Thomas Kinkade that I like. If I can talk her out of it, I might hang it on the right wall and put an acoustic panel behind it. A 2' x2' x 2" panel would fit. Do you think that would be large enough?
    SDA 2B-TL (Sonicap/Solen/Mills, Erse Super Q, Rings, Spikes, No-Rez)
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  6. #6

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    Nice now all you need is a bigger tv
    HT setup
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  7. #7
    GV#27
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    Quote Originally Posted by Stew View Post
    . A 2' x2' x 2" panel would fit. Do you think that would be large enough?
    That should certainly help and it should be 3-4" thick, just use a few layers of OC703.That right speaker does look abit close to the wall which will be acting like a big reflector.For maximum SDA effect reflections in the 200-1000hz range should be minimized.

  8. #8

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    Thanks GV - I'll give that a try. I stacked pillows on top of the couch just to see if it makes a difference. It does open up the soundstage on that side a bit. Acoustic panels should work much better.

    Some of the web sites that sell acoustic panels also show panels behind the speakers and on the rear wall. I don't want to get carried away but just curious how much that really helps. It seems like couches, pillows, etc. would address reflections to some extent. Does it really help a lot to have that many panels?
    SDA 2B-TL (Sonicap/Solen/Mills, Erse Super Q, Rings, Spikes, No-Rez)
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    Dared SL-2000a (Siemens Triple Mica 12AT7's, Brimar 5Z4G Rectifier)
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  9. #9

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    Very nice job Stew!

    I have ATS acoustic panels in my listening room. But I have no space to make my own so I just bought their panels. Pictures of my panels are on my walls are on their website.

    They are the pictures with the box mounted to the top of my car. I bought (2) 48" x 48" x 4" panels and (4) 24" x 48" x 4" panels from them.

    Sal
    Last edited by Lasareath; 08-09-2008 at 10:06 PM.
    Polk Audio SDA SRS 1.2TL's
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  10. #10

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    I have to step up, and treat my room. I know that I need it it bad. I have some pretty big peaks, and I know the answer. I wish ridged fiberglass was available locally:(
    Looks good. Do you know the mirror trick to figure out sound reflections?
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  11. #11
    GV#27
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    Quote Originally Posted by Stew View Post

    Some of the web sites that sell acoustic panels also show panels behind the speakers and on the rear wall. I don't want to get carried away but just curious how much that really helps.
    For me the biggest improvement was brought about when I placed panels at each side wall first reflection point and the upper rear wall and rear corners.I tried some big panels directly behind the spreakers but I did not find them to make any difference.Like you I had a slap echo problem. I was able to control it by adding corner traps in the upper half of the rear corners and 2 panels across the back wall.Adding bass traps in any of the rooms corners should be benificial and I plan to build a pair soon.
    It seems like couches, pillows, etc. would address reflections to some extent.
    They will.
    Does it really help a lot to have that many panels?
    The more lively and reflective the room(ie sparsely furnished,bare hardwood floors) the greater the need for more absorbtion to be added.
    Last edited by GV#27; 08-09-2008 at 10:53 PM.

  12. #12

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    Quote Originally Posted by ben62670 View Post
    Do you know the mirror trick to figure out sound reflections?
    Ben - I do not. How does it work?
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  13. #13
    GV#27
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    Quote Originally Posted by ben62670 View Post
    I wish ridged fiberglass was available locally:(
    Mineral wool works just as well but as its not rigid you will need to build a wood frame.look for the ROXUL brand.

  14. #14

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    Quote Originally Posted by Lasareath View Post
    Very nice job Stew!

    I have ATS acoustic panels in my listening room. But I have no space to make my own so I just bought their panels.
    Thanks Sal! I'm not sure I could make them much cheaper than ATS sells them. I didn't see any corner panels on their web site so I made these. If I decide to go with flat panels, I may buy some already made from ATS as well.
    SDA 2B-TL (Sonicap/Solen/Mills, Erse Super Q, Rings, Spikes, No-Rez)
    NAD C275BEE
    Dared SL-2000a (Siemens Triple Mica 12AT7's, Brimar 5Z4G Rectifier)
    Jolida JD-100a (TJ Full Music 12AX7's)
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  15. #15

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    From your listening position have someone take a mirror, and hold it near flat against the walls. When you can see your teeters in the mirror you have found the primary reflection point;) Thats where the biggest HF reduction can be made.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  16. #16

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    Quote Originally Posted by GV#27 View Post
    Mineral wool works just as well but as its not rigid you will need to build a wood frame.look for the ROXUL brand.
    Will do. Thanks again GV. I have my pre running now:)
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  17. #17
    GV#27
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    Quote Originally Posted by ben62670 View Post
    I have my pre running now:)
    Great I just checked that thread.Fun stuff eh;)

  18. #18

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    Quote Originally Posted by ben62670 View Post
    From your listening position have someone take a mirror, and hold it near flat against the walls. When you can see your teeters in the mirror you have found the primary reflection point;) Thats where the biggest HF reduction can be made.
    Ben
    Thanks Ben - I'll try that today.
    SDA 2B-TL (Sonicap/Solen/Mills, Erse Super Q, Rings, Spikes, No-Rez)
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  19. #19

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    Quote Originally Posted by Stew View Post
    Thanks Sal! I'm not sure I could make them much cheaper than ATS sells them. I didn't see any corner panels on their web site so I made these. If I decide to go with flat panels, I may buy some already made from ATS as well.

    Yes, it's just too easy to buy them already made from ATS, And it's not like they didn't do anything, they really worked, I couldn't listen to my system for more than 30 mins without getting severe headaches, now it's just pleasant.
    Polk Audio SDA SRS 1.2TL's
    With new Exotic wood, Sonicaps, Mills & RDO198's - Born on 4-24-1989 and Signed by Matthew Polk!!!!


    My Polk SDA SRS 1.2TL's http://www.LASAREATH.com/


    It All Started here: http://tinyurl.com/lasareath2

    Part Deux: http://tinyurl.com/lasareath3

    Car Stereo---->http://www.salsleaf.com/leaf_stereo/index.htm<---- NEW for 2013

  20. #20

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    Sorry to bring up an old thread, but, I just built some corner panels myself, and am having a hard time figuring out how to hang them. How did you go about doing this?

    Thanks!

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    Just like you would hang a painting or anything else.

  22. #22

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    Default Just finished my DIY acoustic corner panels

    dats some cool ish..why not get the interior neons and have them hooked up the same why? Just wondering.

  23. #23

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    Quote Originally Posted by Spehoks09 View Post
    dats some cool ish..why not get the interior neons and have them hooked up the same why? Just wondering.
    Right on! RICE THE BASEMENT!!!




    Reported.
    I don't read the newsssspaperssss because dey aaaallllllllll...... have ugly print.

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