SDA 2 drivers

cwsmith68
cwsmith68 Posts: 434
edited December 2011 in Vintage Speakers
I picked up a set of 4 drivers for spares or whatever. All 4 are stamped SDA-2.
2 of them are mw 6511's and 2 are mw 6503's. Is that right? 2 different models for the same speaker? All are also stamped September 1987
Main system:
Denon PRA-1500, Denon POA-2400, Denon TU-660, Denon DCD-2560, Denon DVD-2910, Denon DRS-640, Denon DP-30L II w/DL-301 mc cart, BSR EQ-3000, DCM Timeframe 600's
Post edited by cwsmith68 on
· Share on FacebookShare on Twitter

Comments

  • F1nut
    F1nut Posts: 50,566
    edited December 2011
    Is that right?

    Yes.
    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

    · Share on FacebookShare on Twitter
  • Toolfan66
    Toolfan66 Posts: 17,243
    edited December 2011
    Yep that is correct!!!
    · Share on FacebookShare on Twitter
  • gimpod
    gimpod Posts: 1,793
    edited December 2011
    Yes there out of a set of SDA 2B's.
    The MW-6511's are the Dimensional drivers.
    The MW-6503's are the Stereo drivers.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
    · Share on FacebookShare on Twitter
  • cwsmith68
    cwsmith68 Posts: 434
    edited December 2011
    Great. Thanks
    Main system:
    Denon PRA-1500, Denon POA-2400, Denon TU-660, Denon DCD-2560, Denon DVD-2910, Denon DRS-640, Denon DP-30L II w/DL-301 mc cart, BSR EQ-3000, DCM Timeframe 600's
    · Share on FacebookShare on Twitter
  • Toolfan66
    Toolfan66 Posts: 17,243
    edited December 2011
    Do you have a set of SDA's
    · Share on FacebookShare on Twitter
  • gdb
    gdb Posts: 6,012
    edited December 2011
    Put some JB Weld on them Beeyotches quick ! (to prevent shifted magnet-paperweight syndrome) A long history of defective glue jobs plagues these drivers and renders them useless........ with great regularity!:eek:
    · Share on FacebookShare on Twitter
  • jim 249
    jim 249 Posts: 347
    edited December 2011
    A long history of defective glue jobs plagues these drivers and renders them useless

    Are the MW-6510's also plagued with this problem?
    · Share on FacebookShare on Twitter
  • gdb
    gdb Posts: 6,012
    edited December 2011
    All of them, AFAIK.
    · Share on FacebookShare on Twitter
  • Toolfan66
    Toolfan66 Posts: 17,243
    edited December 2011
    jim 249 wrote: »
    Are the MW-6510's also plagued with this problem?

    Yes!! I have handled over 100 MW's and have only lost 2 of them but I do agree about JB Welding them, I do it on all upgrades.
    · Share on FacebookShare on Twitter
  • gimpod
    gimpod Posts: 1,793
    edited December 2011
    gdb wrote: »
    Put some JB Weld on them Beeyotches quick ! (to prevent shifted magnet-paperweight syndrome) A long history of defective glue jobs plagues these drivers and renders them useless........ with great regularity!:eek:
    By all means JB Weld them. For your info it's not from a "defective glue job" the problem stems from the fact that these drivers are over 25 years old and the epoxy used back then wasn't even close to what is used now days and besides epoxy will only hold for so long. And it's not just the Polk drivers any 25+ year old driver that has the magnet epoxied on will and can suffer the same fate.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
    · Share on FacebookShare on Twitter
  • jim 249
    jim 249 Posts: 347
    edited December 2011
    By all means JB Weld them

    Dumb question time. This is the first time I have heard of this. Does the glue go around the outside (back) plate where it meets the magnet?
    · Share on FacebookShare on Twitter
  • gdb
    gdb Posts: 6,012
    edited December 2011
    After examining countless frozen 6.5" Polk MW drivers I'm gonna' hafta' stick with defective as my descriptor for the glue jobs. In some cases, as little as one quarter of the available gluing surfaces were coated with glue/adhesive/epoxy or whatever that lame stuff is. Bad choice of material coupled with shoddy QC and oversight, equals....... paperweights.
    · Share on FacebookShare on Twitter
  • gdb
    gdb Posts: 6,012
    edited December 2011
    jim 249 wrote: »
    Dumb question time. This is the first time I have heard of this. Does the glue go around the outside (back) plate where it meets the magnet?
    Do a search, there's threads with pics somewhere's hereabout.:wink: Get NONE on the surround or cone !!! :cry:
    · Share on FacebookShare on Twitter
  • cwsmith68
    cwsmith68 Posts: 434
    edited December 2011
    No. Toolfan66. I don't own any SDA'S. Just thought I would grab these for any future projects of mine or to help out anyone that may be in need of these. I have an RTA 12B project that I will be taking on as soon as the shipper settles on the damage claim.
    Main system:
    Denon PRA-1500, Denon POA-2400, Denon TU-660, Denon DCD-2560, Denon DVD-2910, Denon DRS-640, Denon DP-30L II w/DL-301 mc cart, BSR EQ-3000, DCM Timeframe 600's
    · Share on FacebookShare on Twitter