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  1. #1

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    Default Polk Audio SDA SRS 2 Crossover Modification Thread

    Tweeter Network -
    Clarity Cap ESA
    Mundorf Mox

    Midbass Network -
    Clarity Cap PX and Solen PB400V

    Upgraded binding post, NL2 connections

    This will also be to accommodate the RDO198 - it looks like it has been done with this model and the owner wants to make it happen! :)
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  2. #2

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    What's being done with the bottom tweeter and circuit? What's being done to compensate for the overall balance being thrown out of whack?
    'Political Correctness'.........defined

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  3. #3

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    This just got bumped from cool to serious...

    I won't give any details but I would stay tuned!!! :]

  4. #4

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    Rough layout of point to point SDA crossover... :) - will most likely change it a bit, just wanted to see how it all fit!

    Will be suhweet!
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  5. #5

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    So, what is being done with the bottom tweeter and circuit? What's being done to compensate for the overall balance being thrown out of whack?
    'Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

  6. #6

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    All I will comment is the resistor needed to run 194 has been ordered and the customer is ordering 198 tweeters with the understanding if it does not sound right we can change it over pretty easy...

  7. #7

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    How can it sound right when the MW6509 drivers are so different than the MW6503, MW6510 and MW6511 used in the models that are or can be TL'd?

    The SRS 2 blade/blade is a 4 ohm nominal speaker, all the TL speakers are at least 6 ohm.

    The MW6509 has a resistance of 8.970 ohms, the Fs is 30Hz.
    The MW6503 has a resistance of 6.540 ohms, the Fs is 29Hz.
    The MW6510 has a resistance of 6.570 ohms, the Fs is 31Hz.
    The MW6511 has a resistance of 3.130 ohms, the Fs is 29Hz.

    I'm not a speaker designer, but I know enough to know that there has to be a balance between the highs and the lows. I don't see how that is possible with the given info.
    'Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

  8. #8

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    I understand all of this...


    the only reason we are trying it is because I found a couple quotes from Matt Polk saying it should work as well as Ken. I also found a couple members who have performed the mod with success

  9. #9

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    I think I am going to do this like the Legacy Empire crossover -

    The left side of the crossover will be built in layers to save room and unclutter everything and the back end of the crossover will house the larger components...

    All of the wiring will be completed beneath the board for a clean look.

    I am excited to see the results!
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  10. #10

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    Quote Originally Posted by VR3 View Post
    the only reason we are trying it is because I found a couple quotes from Matt Polk saying it should work as well as Ken.
    Yes, I have read Matt's comments too. Not exactly a ringing endorsement.

    I also found a couple members who have performed the mod with success
    Yeah.....ummmm......questionable at best, IMO. You can't just change the top tweeter and circuit and do nothing with the bottom one.
    'Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

  11. #11

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    Love Padauk wood!
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  12. #12

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    Padauk has a natural oil to it - just polished it out - looking good!

    Plexiglass cut and ready for some general layout ideas!
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  13. #13

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    Not to rain on your fine wood but did you know that Padauk will loose it's color over time and go to kind of a bleached out look. I have quit using it. At least that's my experience with it, best of luck. Oh, I still owe you some coins for my parts, will pp sap.
    Last edited by michael1947; 01-27-2013 at 02:42 PM. Reason: forgot something
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    Polk SDS-SRS with mods, CSI 5 center + Klipsch SC2, Polk RT2000P rears, Klipsch KG 1.5's sides, Polk Micro Pro 1000, Polk Micro Pro 2000, Polk SW505, Belkin PF60, Signal Cable Classics,Monster IC's, 2 15 amp circuits & 1 20 amp circuit.

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  14. #14

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    I could see that happen if it was exposed...

    This piece of wood will see the light of day for the next... 2 weeks and then it will be forever housed away inside of a loudspeaker! :-P.
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  15. #15

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    Love it when a plan looks this awesome! :-P
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  16. #16

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    Rough idea on how the big parts will lay out -

    the small parts I am still up in the air about!
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  17. #17

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    Exactly as imagined!

    Just have find some 3" polished stand offs for the second tier!
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  18. #18

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    Midbass/SDA network wired up!
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  19. #19

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    Trey, are these for the blade blade as you can TL them?

    looking good!

    Polk Audio SDA CRS+ (4.1TL by Trey, Larry's Rings)-
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  20. #20

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    This is a blade blade SDA SRS 2

    We are attempting a controversial RDO198 modification! :-P

    But we are also including parts to convert them to 194 tweeters in case it is not 100%!

    Thanks! :)
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  21. #21

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    Tweeter network!

    Not 100% complete but my stopping point for now!
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  22. #22

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    General idea of the layout
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  23. #23

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    One crossover completed, one to do and internal wiring! :)
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  24. #24

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    Mirror imaged crossovers, right and left! :)
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  25. #25

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    It is hard to work backwards lol
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  26. #26

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    Internal wiring mock up
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  27. #27

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    Internal wiring in place
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  28. #28

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    Nice work!

  29. #29

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    Thank you sir! :)
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  30. #30
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    Quote Originally Posted by VR3 View Post
    Thank you sir! :)
    "Pretty"!

    Very "Pretty"!

    You liike that word James?

    I am just ribbing you Trey (Inside Joke).
    Very nice work my friend!
    As usual, VERY, VERY NICE!
    Last edited by pepster; 02-08-2013 at 01:32 AM.

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