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  1. #1

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    Default Sound Dampening Foam questions

    Has anyone used some of the sound abatement foams like NoRez or Sonic Barrier
    inside their SDA model speakers and where did you place it? Did you think it helped improve the
    sound quality? I think I want to use some NoRez in mine, the reviews are good.
    If you have pics too that would be great, thanks.
    Craig

  2. #2

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    get you search on there are several folks who have done just that most with favorable results.

  3. #3

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    I've not used No Rez, but I've read that it's good.

    What I did use is Black Hole. See my write up here: http://www.polkaudio.com/forums/show...lack+hole+TF66

    It absolutely improved the sound of both my 2.3TL's and RTA 12C's, de-congesting the midrange - didn't know it was congested till I heard the speaks with the BH installed. I highly recommend this stuff.

    I wouldn't waste money on sonic barrier.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR binding posts, upgraded IC Cable, Black Hole Damping Sheets (3" strips) installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA transformer

  5. #5

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    Bump

  6. #6

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    I used norez and placed it in 3" strips behind the MW and tweeters keeping the factory fill in place.

    I had done several other upgrades when I did this but I recall that the bass had improved texture and increased punch.

    Name:  394033_341860305836183_2041273512_n.jpg
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Size:  16.3 KB
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs

    Ofc: Wright WLA12 preamp: Anthem Amp 1: Pio Elite DV-79AVI: Airport Express: CAL Sigma II DAC: PA LS90 sonicaps and mills

  7. #7

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    Quote Originally Posted by thsmith View Post
    I used norez and placed it in 3" strips behind the MW and tweeters keeping the factory fill in place.
    Thanks thsmith! How did you come to the conclusion to use that amount? Did some other polkies try that as well with good results?

  8. #8

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    Quote Originally Posted by Conradicles View Post
    Thanks thsmith! How did you come to the conclusion to use that amount? Did some other polkies try that as well with good results?
    I was cheap and bought one sheet and that is how it worked out dividing the material between 2 speakers and it seemed others who went down this path before had over did it with BH5 and found less was better.


    I suppose in theory with norez you could do the most if not the entire cabinet with no ill effects.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs

    Ofc: Wright WLA12 preamp: Anthem Amp 1: Pio Elite DV-79AVI: Airport Express: CAL Sigma II DAC: PA LS90 sonicaps and mills

  9. #9

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    YEP!! 3" strips behind the drivers and 2" strips along the side walls behind the drivers as well is what I did and love it!!!

    BTW I used BH5. I have wanted to try no rez for sometime but have not had the project for it just yet..
    Hot Rodded SDA 1.2TL's, SDA 1C's, SDA CRS+'s...
    Powered By Wyred 4 Sound, STP-SE, SX-1000...
    MIT-Shotgun's ...

  10. #10

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    No Rez is a great product.

    The only thing I caution against is putting it too close to the midbass drivers, do not crowd the drivers.
    www.Vr3Mods.com ///// www.Version3Audio.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro

  11. #11

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    Quote Originally Posted by Toolfan66 View Post
    YEP!! 3" strips behind the drivers and 2" strips along the side walls behind the drivers as well is what I did and love it!!!

    BTW I used BH5. I have wanted to try no rez for sometime but have not had the project for it just yet..
    I used Black Hole 5 behind the mids (one 4" strip behind each) and along the sides (one 2" strip on each side) in my SDA SRS1.2s. I cannot comment on what precisely the effect was, because I implemented several mods at once. Overall clarity and distnctness of midrange was definitely improved.

    Here's a picture:

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    I second Toolfan's "Trey for Polkie of the year!"
    Family Room
    Cambridge Audio Azur 840C CD Player, King Cobra XLRs
    Perreaux SM6P MKII Preamp, AQ Sky XLRs
    Perreaux Prisma 750 Amps, Morrow SP7 Cables
    SDA SRS 1.2as (RD0194s, Dreadnought, Black Hole 5, Acousta-Stuf, Dynamat Extreme, JBWeld. Vr3 Mods: Xovers & Binding Post Cups, SDA Inductors & Interconnect Cables)

    Exercise Room
    Wadia 171i, Supernova 6 Glass Toslink
    CA Azur 840C, AQ King Cobra RCAs
    Perreaux SM6P Preamp & PMF3150 Amp, AQ King Cobra RCAs
    Dreadnought
    SDA 1Cs (Mod'd)

  12. #12
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    I've just used regular, soft foam and it helped absorb the back wave on the mid drivers to provide a cleaner sound.

  13. #13

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    Quote Originally Posted by Moose68Bash View Post
    I used Black Hole 5 behind the mids (one 4" strip behind each) and along the sides (one 2" strip on each side) in my SDA SRS1.2s. I cannot comment on what precisely the effect was, because I implemented several mods at once. Overall clarity and distnctness of midrange was definitely improved.

    Here's a picture:

    Attachment 82708

    I second Toolfan's "Trey for Polkie of the year!"
    That is exactly how I have mine..
    Hot Rodded SDA 1.2TL's, SDA 1C's, SDA CRS+'s...
    Powered By Wyred 4 Sound, STP-SE, SX-1000...
    MIT-Shotgun's ...

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