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  • Old speaker repair question

    Hi All,
    I got a pair of old Epicure 120 speakers, salvaged. The speakers are in good shape, but the woofer foam is shot. The prev owner tried to repair one, but the job isn't so good. The other speaker, the foam is completely gone.
    I found a place that sells new foam kit for these speakers but this particular kit doesn't have dust caps, so I have no way to shim the coils inside when the foam is glued on. Wondering if there's a place that sells dust caps by diameter? Haven't found one yet. Also, anyone know what chemical might kill the old glue holding the dust cap on? Was thinking maybe Acetone, in a small amount on a q tip.
    Last question, the cardboard ring that sits over the foam is gone on both speakers. I could not find a kit for this speaker, wondering if someone knows a speaker rebuilt parts place that might sell cardboard rings by diameter. The speaker basket has the mounting holes slightly outside where the cardboard ring goes so I think a generic one by diameter would work.
    THanks!
    Mike
    The only good solid state amp is a dead solid state amp. Unless it sounds really good, then its OK.

  • #2
    Simply Speakers out of Florida....You can also install the surrounds without using shims...there are videos on their site that you can watch....they are great to deal with as i have ordered from them a few times now....check them out....

    Comment


    • #3
      I too have used Simply Speakers. Look for their videos on YouTube (search words = "speaker foam"). Parts Express also sells foam. Here is their "how to" video.

      https://www.youtube.com/watch?v=jwcfP5pKeek

      Years ago, I bought a foam kit for my JBL home speakers. The ring was a tad too big. I made a cut through the ring and overlapped the material. It has held up great over the years.

      Good luck.

      Comment


      • #4
        Originally posted by mikepukmel View Post
        Hi All,
        I got a pair of old Epicure 120 speakers, salvaged. The speakers are in good shape, but the woofer foam is shot. The prev owner tried to repair one, but the job isn't so good. The other speaker, the foam is completely gone.
        I found a place that sells new foam kit for these speakers but this particular kit doesn't have dust caps, so I have no way to shim the coils inside when the foam is glued on. Wondering if there's a place that sells dust caps by diameter? Haven't found one yet. Also, anyone know what chemical might kill the old glue holding the dust cap on? Was thinking maybe Acetone, in a small amount on a q tip.
        Last question, the cardboard ring that sits over the foam is gone on both speakers. I could not find a kit for this speaker, wondering if someone knows a speaker rebuilt parts place that might sell cardboard rings by diameter. The speaker basket has the mounting holes slightly outside where the cardboard ring goes so I think a generic one by diameter would work.
        THanks!
        Mike
        You can usually reuse the old gaskets. Use a utility knife and get it between the speaker frame and the gasket and cut it loose. If the gaskets are missing, that's another story. Do you need gaskets? If the speakers are front mounted, they aren't necessary and may have never been there.

        I wouldn't use any chemicals to remove the glue ring around the dust cap. It may weaken the speaker cone. Just cut off the old cap with an exacto knife as close to the glue as you can and replace the dust cap with a slightly larger one to cover up the old leftover glue. Got any old/blown speakers laying around with larger dust caps? If so, cut them off and reuse them. I reuse dust caps all the time. Just set them on a flat surface and use a scissors to straighten/level the outer edge before use.

        You can get replacement foam surrounds all over ebay. It requires some measuring on your part to make sure inside and outside diameter are correct. There are also flat and angled foams for different speaker cones. Be sure to get the correct one.

        Instead of using shims, you can also run a low level low frequency sine wave to the speaker instead of cutting off the dust cap while you glue the foam to the frame. That will keep the coil centered. IMO, using shims is much more reliable and easier, but using a test tone is another option.
        "Yeah, well, you know, that's just, like, your opinion, man."

        Comment


        • #5
          Thanks everyone! It turned out that after removing the foam, its actually a cardboard run under the foam, didn't expect that. Got the old foam off, and new foam on. Not very pretty job, but its the first repair, so I can't beat myself up too badly (although I usually do anyway). One speaker sounded awesome, the other .... dang a TINY spot of glue rolled down under teh dust cap, and between the small gap in the paper ring that the voice coil sits on, and glued the inside of that one voice coil to the magnet. Had to cut off one dust cap, but managed to clean that spot and get both working.

          Thanks for the tip on chemicals.

          Also, very wierd, 3 places have foam surrounds that are for this exact model speaker, but the dimensions are wrong, they're like 1" too small ID and OD. I searched trial and error and found a set with the right dimensions for a different brand speaker. Im pretty sure there are original woofers, as they have the date code on back.

          But, .... they make sound!

          Im leading up to picking up a nicer pair used with shot foam, and fixing them. Eeek, this glue is very hard to work with. It glues well, but is very "runny", like model airplane glue.
          The only good solid state amp is a dead solid state amp. Unless it sounds really good, then its OK.

          Comment


          • #6
            Dude thanks for the note on test tone vs shims. I found a youtube vid wihere the guy used a test tone. I could not imagine being able to get all that done, and hold the thing in the right spot while the glued hardened with a tone making the cone hop like that! I ended up making shims. Took forever to find the right thickness paper. Found some almost like card stock printer paper that worked.
            The only good solid state amp is a dead solid state amp. Unless it sounds really good, then its OK.

            Comment


            • #7
              Yep. Gaps are different sizes so shims must also be, but I find that business cards cut in strips often work well.
              "Yeah, well, you know, that's just, like, your opinion, man."

              Comment

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