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Replacement mid for Optimus T100?

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  • Replacement mid for Optimus T100?

    I have a pair of Optimus STS-100's, one of the midrange speakers has a large tear in it and I would like to find a good replacement for it (I would replace it in both speakers. It is a 4" driver, but I don't know any other specs for it. I was wondering if the Visaton M 10 would be a good replacement driver? Anyone with experience with Optimus STS-100's or Visaton M 10?
    Last edited by csbrownnine; 08-08-2019, 11:43 AM. Reason: Corrected model number from T-100 to STS-100

  • #2
    When I Google those, all I find is a unit with two woofers and a tweeter. For example:

    https://tmraudio.com/product/tmr-1770
    Francis

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    • #3
      Originally posted by csbrownnine View Post
      I have a pair of Optimus T100's, one of the midrange speakers has a large tear in it and I would like to find a good replacement for it (I would replace it in both speakers. It is a 4" driver, but I don't know any other specs for it. I was wondering if the Visaton M 10 would be a good replacement driver? Anyone with experience with Optimus T100's or Visaton M 10?
      Could you provide a picture please. I see the T120 as having a mid driver, but not the T100.....

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      • #4
        Sorry, it appears that I gave the wrong model number. I was told that they were T-100's, but after doing some more research, it appears that they are probably model STS-100's? Picture attached. Click image for larger version

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        • #5
          Here is a closer picture of the damaged midrange driver
          Click image for larger version

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          • #6
            You may get lucky, and someone here has measured the old driver, and/or redesigned the crossover for a new driver. Or perhaps eBay has a direct factory replacement. Otherwise, a repair might be the best solution.
            Francis

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            • #7
              Won't be a square frame, but the GRS sealed mid will likely be a decent match for that.

              I would link, but PE site has about 40 tantrums per day where it refuses to load, and this is one of those times.
              Don't listen to me - I have not sold any $150,000 speakers.

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              • #8
                GRS 5SBM-8 5" Sealed Back Midrange

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                • #9
                  Strange place for a tear ! Are they closed or open backed? Why not just massage the tear back together and apply a line of paper (Elmer's) glue? Does the voice coil still work?

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                  • #10
                    They are closed back, which seems would make repair difficult. I've never tried repairing a torn cone before, although I have used a repair kit from PE to replace rotted surrounds before and was quite happy with the results. Is there a good method for repair of a cone when the back is sealed?
                    Attached Files

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                    • #11
                      4" "closed back" could be a problem (I don't SEE any on PE's site).
                      If the voice coil still works, why not just apply white glue to the crack and see how it sounds?

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