Anybody know where I can find a replacement 6511 Mid woofer for a SDA-1C

Dawgfish
Dawgfish Posts: 2,554
edited May 2010 in Vintage Speakers
Hello everyone. Hope all is well throughout Polkland. Last night I was listening to some tunes and I noticed a scratchy sound whenever a part of the music would come on that was bass-heavy out of my right SDA-1C. I immediately checked the drivers and sure enough the upper outside mid-woofer was scratchy and rough sounding when I pushed the cone in with my hand.

I have a set of RTA-12Bs lying around, so I pulled a midwoofer out of one of them thinking they were probably the same driver, but they are not. The RTA-12B midwoofer was a 6503 while the SDA-1C midwoofer is a 6511. I went ahead and installed the 6503 in the SDA-1C as a temporary replacement, and honestly, I can't tell any difference in sound (or looks for that matter)at all. Having said that, I want to keep everything uniform so I would like to find a replacement 6511 MW. Those anybody here on the board have a spair 6511 MW lying around that they would sell me? If not, does anybody know where I can find a replacement 6511 MW? I'm not sure if Polk still sells replacement 6511 MWs or not. I'll call tomorrow and ask if I don't get any other leads before then. Thanks in advance.
Post edited by Dawgfish on
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Comments

  • zarrdoss
    zarrdoss Posts: 2,562
    edited May 2010
    those are rare and hard to find. The new ones you get from Polk just don't look the same. I have had to do the same with my 2.3's and with the same result. Eventually I found a 6511 on -e-bay. I am pretty sure the ohms are the same on the 6503 and 6511, but apparently are not the exact same speaker.
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  • Toolfan66
    Toolfan66 Posts: 17,337
    edited May 2010
    zarrdoss wrote: »
    those are rare and hard to find. QUOTE]

    "Depends" All I have to do is walk to my closet...:cool:
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

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    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited May 2010
    TOOLFORLIFEFAN wrote: »
    zarrdoss wrote: »
    those are rare and hard to find. QUOTE]

    "Depends" All I have to do is walk to my closet...:cool:

    speaker ****! lol
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  • fbm211
    fbm211 Posts: 1,488
    edited May 2010
    Thats a dim driver correct? Polk still sells those I think.
    SDA-2BTL with custom IC
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  • thsmith
    thsmith Posts: 6,082
    edited May 2010
    They come up on ebay ever so often but for the price and potential damage from shipping if the seller has no idea you might as well buy from POlk.
    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
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  • fafner
    fafner Posts: 115
    edited May 2010
    TOOLFORLIFEFAN wrote: »
    zarrdoss wrote: »
    those are rare and hard to find. QUOTE]

    "Depends" All I have to do is walk to my closet...:cool:

    The sell me a 6503 and a 6511 :)

    fafner
    Fronts - Polk SDA2B's
    Center - Polk 350CS
    Surrounds #A - Another pair of SDA2B's
    Surrounds #B - Another pair of SDA2B's
    Rears - Yet another pair of SDA2B's
    Subwoofers - 2 M&K's
    AVR - Denon 3808CI
    Display - Sony 52KDL4100
    Blu-ray Player - JVC BP-1
    HTPC - Self built - Intel Quad Core I7 920@4.0ghz
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  • thsmith
    thsmith Posts: 6,082
    edited May 2010
    I have 2 of each as spares, a good idea for anyone who plans to keep them.
    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
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  • fafner
    fafner Posts: 115
    edited May 2010
    thsmith wrote: »
    I have 2 of each as spares, a good idea for anyone who plans to keep them.

    Why? Is it common for these MW's to blow?

    fafner
    Fronts - Polk SDA2B's
    Center - Polk 350CS
    Surrounds #A - Another pair of SDA2B's
    Surrounds #B - Another pair of SDA2B's
    Rears - Yet another pair of SDA2B's
    Subwoofers - 2 M&K's
    AVR - Denon 3808CI
    Display - Sony 52KDL4100
    Blu-ray Player - JVC BP-1
    HTPC - Self built - Intel Quad Core I7 920@4.0ghz
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  • gdb
    gdb Posts: 6,012
    edited May 2010
    The magnets shift and cause scratching or total freezing of the voice coil. Cement them in place with JB Weld or similar epoxy type cement and the magnets will stay put !;)
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  • Dawgfish
    Dawgfish Posts: 2,554
    edited May 2010
    gdb,

    Great tip. I was thinking about JB welding and dynamatting the drivers anyways when I do my crossover upgrades, so I will look into doing this. Looks like I'm going to need to contact Polk. Thanks for the replys everybody.

    Steve
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