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  1. 12-18-2012 07:40 PM #1
    VR3
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    Default Polk Audio SDA SRS 1.2TL Crossover Modification Thread

    This one should be a lot of fun!

    1) The speakers will be recorded stock!
    2) Parts list is as follows -

    Tweeter Network -Clarity Cap MR
    Clarity Cap ESA
    Mundorf Mox Resistors
    Jantzen Inductors

    Midbass/SDA Network -Clarity Cap ESA
    Jantzen Inductors

    Gimpod boards too
    NL2 Connections for the SDA, Supra Rondo wire, Upgraded binding post

    200 Hours or so of burn in

    3) Record them modified!

    This will be a fun project for sure!
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  2. 12-18-2012 08:24 PM #2
    toucanet
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    I'm all eyes on this one.

    Good luck!
    Re-electing our politicians would be like chickens voting for Colonel Sanders
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  3. 01-14-2013 06:15 PM #3
    VR3
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    Default

    Off to record these bad boys stock! :)

    Still waiting on the inductors though to mod these!
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  4. 01-14-2013 08:59 PM #4
    DarqueKnight
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    Default

    Also make note of the changes in spatial properties between the stock and modified versions.
    "Polk SDA-SRSs are hopelessly out of date both sonically and technologically... I see no value whatsoever in older SDA speakers."~Audio Asylum Member
    __________________
    "Knowledge, without understanding, is a path to failure."~DK
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  5. 01-15-2013 08:48 PM #5
    Reagan
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    Default I am very interested...

    ...in the results of this mod! (Especially since I own the pair to be modded)

    Reagan
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  6. 01-15-2013 08:56 PM #6
    PolkieMan
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    You are replacing all of the inductors too?


    Quote Originally Posted by VR3 View Post
    Off to record these bad boys stock! :)

    Still waiting on the inductors though to mod these!
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  7. 01-15-2013 08:57 PM #7
    VR3
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    Yes, all board mounted and SDA
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  8. 01-16-2013 11:08 AM #8
    drumminman
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    Quote Originally Posted by Reagan View Post
    ...in the results of this mod! (Especially since I own the pair to be modded)

    Reagan
    Have you spent much time with the 1.2's before the mods? I'm interested in a before and after comparison given that you're using, among other components, Clarity Cap MR's.

    You're investing some serious coin!
    "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
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  9. 01-16-2013 09:54 PM #9
    Reagan
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    I've had the 1.2 TL's for about 10 years but am the original owner of SDA 1A's and 2'A's. I did the crossover upgrade on the 2A's and was quite pleased with the results. Reagan
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  10. 01-17-2013 07:31 AM #10
    drumminman
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    Quote Originally Posted by Reagan View Post
    I've had the 1.2 TL's for about 10 years but am the original owner of SDA 1A's and 2'A's. I did the crossover upgrade on the 2A's and was quite pleased with the results. Reagan
    Cool - looking forward to your impressions.
    "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
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  11. 01-19-2013 05:23 PM #11
    PolkieMan
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    Are they available for the 2.3 Tls too?

    Quote Originally Posted by VR3 View Post
    Yes, all board mounted and SDA
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  12. 01-19-2013 06:23 PM #12
    VR3
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    Most definitely!
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  13. 02-06-2013 12:57 AM #13
    VR3
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    https://soundcloud.com/vr3mods/polk-...rs-1-2tl-stock

    Stock recording posted
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  14. 02-06-2013 01:37 AM #14
    VR3
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    I would have to say we captured the imaging capabilities of the SDA really well.. :)
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    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  15. 02-09-2013 09:08 PM #15
    VR3
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    Alright,

    1.2TL recording posted - lets see if Soundcloud likes me tonight!

    http://soundcloud.com/vr3mods/polk-a...rs-1-2tl-stock
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  16. 02-09-2013 10:13 PM #16
    Oldfatdogs
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    Sounds good to me.Who is singing?
    Dan

    Found it Thanks
    Last edited by Oldfatdogs; 02-09-2013 at 10:26 PM. Reason: found song
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  17. 02-09-2013 10:34 PM #17
    VR3
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    That is Millage Gilbert.

    How do you feel we captured the SDA staging?
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  18. 02-09-2013 11:18 PM #18
    Oldfatdogs
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    From what I can tell with my computer speakers it sounds real good.I wish I could give some more helpful feedback than that,but on these speakers just not possible.

    Dan
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  19. 02-10-2013 09:19 PM #19
    VR3
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    I have another 1.2TL coming for modifications that is what I would describe as "Balls Deep"

    Clarity Cap MR on the entire tweeter network, all 12uf and .25uf caps and the midbass/SDA is all ESA.

    I am a little pumped about this!!
    www.Vr3Mods.com

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  20. 02-10-2013 11:01 PM #20
    schwarcw
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    So Trey what are you impressions?
    Carl
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  21. 02-10-2013 11:16 PM #21
    VR3
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    Of the recording?

    I have a lot of opinions but I want to hear everyones opinions first... :)
    www.Vr3Mods.com

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  22. 02-17-2013 01:11 PM #22
    Toolfan66
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    I am really thinking about putting the Clarity MR12's in my crossovers. I'm sure I will have to reconfigure my setup for them.

    Maybe I just buy them and plan on doing a full point to point external crossover..
    Sometimes.. late at nite... I fill my bathtub with tomato sauce and pretend I am a meatball.

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  23. 02-17-2013 06:29 PM #23
    VR3
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    I have a brilliant idea to make the MR work and not even make it look like a mountain ;)

    Stay tuned!
    www.Vr3Mods.com

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
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  24. 02-26-2013 01:38 PM #24
    VR3
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    We *might* need more room! :)
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  25. 02-26-2013 02:22 PM #25
    ZLTFUL
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    "Does this board make my caps look big?"

    "I think we need a bigger board..."

    Damn you Donkey Kong...stop throwing those barrels at me!
    "Success is the ability to go from one failure to another with no loss of enthusiasm." Winston Churchill
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  26. 02-26-2013 02:37 PM #26
    VR3
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    I can't wait to do the mod using the MR 12s... it is going to be SICK! :)
    www.Vr3Mods.com

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  27. 02-26-2013 02:37 PM #27
    nspindel
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    Tony should build a new board. You know, his original seems to have gotten a bit cramped.
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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  28. 02-26-2013 02:44 PM #28
    VR3
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    1.2TL with ESA/Jantzen - half way done! :)
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  29. 02-26-2013 04:14 PM #29
    VR3
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    All wired up! :)
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  30. 02-26-2013 04:21 PM #30
    treitz3
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    Who was it that said size doesn't matter?

    Tom
    In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

    "The best way to enjoy digital music reproduction is to never listen to good analogue reproduction". - Kenneth Swauger
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