SDA Custom Circuit Boards

124

Comments

  • CNWDI
    CNWDI Posts: 91
    edited September 2011
    After looking back through this thread and related ones for the 40-somethingth time I'm a little confused still. It would *appear* that I *can* use these boards to do the full update and TL conversion on my stock 1987ish vintage CRS+ pair (single tweeter; B/B interconnect)...am I right? (The "main" post states that these are only for P/B CRS+ but there's enough other info that I think I can make it work with mine...)
    Current polk speakers:
    Family room 5.1: TC265i R/L, VM10 Center, RC65i surrounds (couldn't match the TCs)
    Basement non-dedicated 7.1 HT: SDA-CRS+ R/L, 255c-LS Center, LSiFX surrounds, RC80i in-ceiling rear surround, plus Wharfedale 12" sub (some day I'll get around to building 15" F-20 sub).
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  • gimpod
    gimpod Posts: 1,793
    edited September 2011
    I don't think so. Polk made 3 versions of the CRS+'s as far as I know.

    1. 1986 Single tweeter, B/B IC, Dual board crossover, MW6510 stereo driver, MW6510 dimensional driver.
    2. 1987 Single tweeter, P/B IC, Single board crossover, MW6503 stereo driver, MW6511 dimensional driver.
    3. 1986 Single tweeter, P/B IC, Single board crossover, MW6510 stereo driver, MW6511 dimensional driver.

    One way to tell for sure is to pull both drivers and see if there both MW6510's also look at the crossover and see if it's of the dual board design. If this is the case you've got the 1986 version and these boards wont work for you.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • mole'
    mole' Posts: 3,160
    edited September 2011
    i have a set for my 2.3TLs and i can tell you guys these boards are top notch....

    A++++ work here
    mole'
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  • CNWDI
    CNWDI Posts: 91
    edited September 2011
    gimpod wrote: »
    I don't think so. Polk made 3 versions of the CRS+'s as far as I know.

    1. 1986 Single tweeter, B/B IC, Dual board crossover, MW6510 stereo driver, MW6510 dimensional driver.
    2. 1987 Single tweeter, P/B IC, Single board crossover, MW6503 stereo driver, MW6511 dimensional driver.
    3. 1986 Single tweeter, P/B IC, Single board crossover, MW6510 stereo driver, MW6511 dimensional driver.

    One way to tell for sure is to pull both drivers and see if there both MW6510's also look at the crossover and see if it's of the dual board design. If this is the case you've got the 1986 version and these boards wont work for you.

    Based on everything I can see, looks as though you're correct. So the next question is: If I really want to redo my crossovers and go full-up 4.1TL, and I'm removing the drivers anyway to add TOOL's rings, should I attempt to procure two MW6511s? It looks as though if I do that plus the RDO198 tweeters plus the new boards, I can do the full-up conversion with these boards.

    Sort of a crazy way to do it, but I can still end up with a very nice "new to me" set of speakers for ~ $600 it would seem...The only other option would be to try to re-engineer the crossover mod to work with a very different driver (4ohm -vs- 8 ohm) and as a EE after comparing the 1986 and 1989 schematics I'm not thrilled with re-engineering things...
    Current polk speakers:
    Family room 5.1: TC265i R/L, VM10 Center, RC65i surrounds (couldn't match the TCs)
    Basement non-dedicated 7.1 HT: SDA-CRS+ R/L, 255c-LS Center, LSiFX surrounds, RC80i in-ceiling rear surround, plus Wharfedale 12" sub (some day I'll get around to building 15" F-20 sub).
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  • gimpod
    gimpod Posts: 1,793
    edited September 2011
    If you really want to TL your CRS+ I think your best bet would be to pick up a pair of single board 2B crossovers with the big round 16mH inductors. Hears a link to what TOOLFORLIFEFAN did with his 1986 B/B CRS+'s

    http://www.polkaudio.com/forums/showthread.php?t=122119

    BTW in that list of mine post #94 number 3 should read 1989 not 1986 :redface:
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • chandler9a
    chandler9a Posts: 878
    edited September 2011
    Got the boards yesterday Tony, Thanks!
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  • Toolfan66
    Toolfan66 Posts: 17,349
    edited September 2011
    Tony I mailed out your rings today..
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

    Cary SLP-05/Ultimate Upgrade.
    Cary SA-500.1 ES Amps
    Cary DMS 800PV Network
    OPPO UDP 205/ModWright Modification
    VPI Scout TT / Dynavector 20x2
    Jolida JD9 Fully Modified

    VPI MW-1 Cyclone RCM

    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • Conradicles
    Conradicles Posts: 6,142
    edited October 2011
    Gimpod, you got a set of boards for the SDA-2B?
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  • Toolfan66
    Toolfan66 Posts: 17,349
    edited October 2011
    I would never do another SDA upgrade without these boards.. I even have an extra set for my goodie box of SDA parts!!!
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

    Cary SLP-05/Ultimate Upgrade.
    Cary SA-500.1 ES Amps
    Cary DMS 800PV Network
    OPPO UDP 205/ModWright Modification
    VPI Scout TT / Dynavector 20x2
    Jolida JD9 Fully Modified

    VPI MW-1 Cyclone RCM

    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • gimpod
    gimpod Posts: 1,793
    edited October 2011
    Conradicles wrote: »
    Gimpod, you got a set of boards for the SDA-2B?
    Why yes I do. PM sent.
    TOOLFORLIFEFAN wrote: »
    I would never do another SDA upgrade without these boards.. I even have an extra set for my goodie box of SDA parts!!!

    Thanks for the plug.:biggrin:
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • F1nut
    F1nut Posts: 50,809
    edited November 2011
    Ya'll better grab some of these before they go the way of Larry's rings....gone forever.
    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 t-u-r-d by the clean end."

    President of Club Polk

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  • SDA1C
    SDA1C Posts: 2,072
    edited November 2011
    I'll take a set for the 1c if you have them.

    Thanks, 1c
    Too much **** to list....
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  • Toolfan66
    Toolfan66 Posts: 17,349
    edited November 2011
    F1nut wrote: »
    Ya'll better grab some of these before they go the way of Larry's rings....gone forever.

    Agreed!!!
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

    Cary SLP-05/Ultimate Upgrade.
    Cary SA-500.1 ES Amps
    Cary DMS 800PV Network
    OPPO UDP 205/ModWright Modification
    VPI Scout TT / Dynavector 20x2
    Jolida JD9 Fully Modified

    VPI MW-1 Cyclone RCM

    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • SDA1C
    SDA1C Posts: 2,072
    edited November 2011
    Thanks Gimpod, its's paid

    1C
    Too much **** to list....
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  • SDA1C
    SDA1C Posts: 2,072
    edited November 2011
    Whoa! Got mine today. These are as professional as they come. Thanks, Gimpod, for a great product and smooth transaction :)

    1C
    Too much **** to list....
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  • headrott
    headrott Posts: 5,496
    edited November 2011
    Got my boards as well Tony. Thank you very much!

    Greg
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
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  • gimpod
    gimpod Posts: 1,793
    edited November 2011
    SDA1C wrote: »
    Whoa! Got mine today. These are as professional as they come. Thanks, Gimpod, for a great product and smooth transaction :)

    1C
    headrott wrote: »
    Got my boards as well Tony. Thank you very much!

    Greg
    You guy's are more than welcome and thank you.

    Don't forget if you have any questions or need help just ask. I'll be more than happy to help out.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • SDA1C
    SDA1C Posts: 2,072
    edited November 2011
    Hi Gimpod,

    I have to ask man. Is there any reason we don't replace the inductors? It seems to me you could build the board complete and not remove anything from the old board(other than the big coil on the back).

    Thanks, 1C
    Too much **** to list....
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  • F1nut
    F1nut Posts: 50,809
    edited November 2011
    I can answer that one. It's been tried and the original inductors are better.
    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 t-u-r-d by the clean end."

    President of Club Polk

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  • SDA1C
    SDA1C Posts: 2,072
    edited November 2011
    Ok fair enough. What makes them better? I just checked the sonicraft website and found the replacement would be huge! is that the only reason?
    Too much **** to list....
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  • F1nut
    F1nut Posts: 50,809
    edited November 2011
    What makes them better?

    Sonics....always the bottom line.
    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 t-u-r-d by the clean end."

    President of Club Polk

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  • SDA1C
    SDA1C Posts: 2,072
    edited November 2011
    uh huh....thanks

    1C
    Too much **** to list....
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  • Face
    Face Posts: 14,340
    edited December 2011
    It would be difficult to source new inductors with the same values(mH, DCR) as the old ones.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • dorokusai
    dorokusai Posts: 25,577
    edited December 2011
    F1nut wrote: »
    I can answer that one. It's been tried and the original inductors are better.
    It's been tried in a very limited number of xovers from what I've read, like 2 or so public folks on here. Didn't another Polkie rave about the changes in another thread? I'm not sure who that was tho...

    I don't have any issues nor poor experience with replacing inductors, never have and its been years. I'd want a much larger perspective on this if I was a newbie mulling the idea over.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • gimpod
    gimpod Posts: 1,793
    edited December 2011
    Ok boys and girls I have 8 pairs of boards left not counting the ones I'm holding for the following members Conradicles, fbm211, heiney9, jmitchnh, knie0012, mikekipina, newrival, Outfitter03. After these are gone there going to be gone. See post # 89 for ordering info.

    On board level inductor replacement I have to agree with F1nut & Face, Sorry dorokusai.

    Here's a link to a thread by DarqueKnight who tried this for the low pass section and his experience in doing so.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • Toolfan66
    Toolfan66 Posts: 17,349
    edited December 2011
    First the rings now the boards!!! I have two extra sets that I'm hanging on to just because I figured this would happen soon.

    If anyone is on the fence I would snag them now as this is a must have IMO for xover upgrades!!! You will not be disappointed.


    Larry.
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

    Cary SLP-05/Ultimate Upgrade.
    Cary SA-500.1 ES Amps
    Cary DMS 800PV Network
    OPPO UDP 205/ModWright Modification
    VPI Scout TT / Dynavector 20x2
    Jolida JD9 Fully Modified

    VPI MW-1 Cyclone RCM

    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • brgman
    brgman Posts: 2,859
    edited December 2011
    Got mine!
    In about a month the gaskets will be done with as well.
    A year from now our stashes will be worth MILLIONS!!!!
    Main Rig-Realistic AM/FM Record player 8 track boasting 4 WPC

    Backup Rig-2 CH-Rogue Audio Zeus w/Factory Special Dark Mods,Joule-Electra 300ME Platinum Preamp,OPPO-105 w/Modwright Tube Mod, Auralic Aries G2.1,Polk 2.3TL,3.1TL's,Dreadnought,RTA-15TL's,1C's All Fully Modded,2xRTA-12c's ,Benchmark DAC3 HGC,Synology NAS,VPI Scout w/Dynavector DV-20XH and Rogue Audio Ares Phono Preamp,Sony PCM-R500 DAT,HHB-850 Pro CDR,Tascam CC-222SLMKII Cassette/CDR,MIT S3.3 Shotgun Cables,Shunyata Hyra-8,Shunyata and Triode Labs Power Cords

    I’M OFFENDED!!!!
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  • Polkersince85
    Polkersince85 Posts: 2,883
    edited December 2011
    Get the wifie a $10 gift card from Walmart and then buy a set of these for yourself. While she is not talking to you would be a great time to solder up the crossovers. You won't regret it.
    >
    >
    >This message has been scanned by the NSA and found to be free of harmful intent.<
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  • gimpod
    gimpod Posts: 1,793
    edited December 2011
    MAN you just about made me spit a mouth full of coke cola all over my monitors. It did get up in my nose though:lol:
    Polkersince85 wrote: »
    Get the wifie a $10 gift card from Walmart and then buy a set of these for yourself. While she is not talking to you would be a great time to solder up the crossovers. You won't regret it.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • toucanet
    toucanet Posts: 580
    edited December 2011
    PM Sent for one pair (for 1.2TLs).
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