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Thread: Odd Shure mic connector

  1. #1
    Supporting Member Randall's Avatar
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    Odd Shure mic connector

    I'm trying to wire up this four pin XLR to a mic cable for an EV model 664 mic. Problem is, I can't seem to get the rubber sheath off. It doesn't want to slide off, and if I peel it back it appears to go inside two slots in the metal. Does anyone have any insight into this connector and how to use it? I have never seen one like it, and I don't want to damage it.

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    It's weird, because it WAS working fine.....

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    Lifetime Member Enzo's Avatar
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    It is a four pin, but not an XLR, but that doesn't help you.

    I might heat the sheath with a heat gun, staying back far enough not to melt it. I might wedge small screwdrivers under the edge or even hardwood toothpicks, to lift the edge over the grooves.

    Unless it is molded to the cord.

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    Supporting Member The Dude's Avatar
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    Is there a set screw on the side of the connector that allows the pin part to come out like the connector in a microphone? Maybe the rubber sleeve part stays put? It's a Shure connector and most all of their male XLR's have the same plastic/pin thingy with the set screw on the side.

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    Last edited by The Dude; 02-21-2020 at 12:44 AM.
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    Don't forget the joker g1's Avatar
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    Is the rubber stopping the threaded ring from you pushing it down? Agree with The Dude that there is probably a set screw under that ring. I think if you can push the rubber back a bit so the ring moves down, you may see a set screw.

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  5. #5
    Supporting Member Randall's Avatar
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    "Maybe the rubber sleeve part stays put?"

    I'm starting to believe that. Where you'd expect to find a set screw there is an indentation that looks like it was stamped in, causing it to bulge out on the inside over the top of the 4 pin plug, holding it in place. Is it possible this connector was never meant to come apart?

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    It's weird, because it WAS working fine.....

  6. #6
    Supporting Member The Dude's Avatar
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    It might be under that threaded collar. Is there a way to thread it off or forward enough to look under it?

    This is a typical Shure XLR male connector showing where the set screw would be if there was one.

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    Edit: FWIW, if you do find a hole with the set screw, they are reverse threaded.

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    Last edited by The Dude; 02-21-2020 at 01:30 AM.
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  7. #7
    Supporting Member Randall's Avatar
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    Here it is with the rubber forced back and the ring out of the way. I have made hundreds of XLR cables in my time, there is no set screw on this one.

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    It's weird, because it WAS working fine.....

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    I haven't seen one like that but would the plastic part unscrew like the all-metal ones?

    https://music-electronics-forum.com/...1&d=1582249522
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  9. #9
    Supporting Member The Dude's Avatar
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    Well, it was worth a shot. I haven't seen one without a set screw.

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  10. #10
    Supporting Member Randall's Avatar
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    I don't think it does unscrew. I will correct myself as Enzo said, it is not XLR, but an Amphenol MC4M. I think I'm getter warmer here, I found this:

    https://www.adorama.com/shc11c.html

    It looks right. I wonder if this a Shure branded connector in name only since it is a Shure cable, not meant to be serviced?

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    Last edited by Randall; 02-21-2020 at 04:53 PM.
    It's weird, because it WAS working fine.....

  11. #11
    Supporting Member The Dude's Avatar
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    Very possible. If no set screw, I'd try to carefully remove the rubber, maybe with some heat like Enzo suggested. If you destroy it, you could maybe make something out of heat shrink and left over parts.

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  12. #12
    Supporting Member Randall's Avatar
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    Yeah, but even if I do get the rubber off, it sure doesn't look like those four pins are ever coming out of the shell, since it looks to me to be stamped shut. I think this is a lost cause.

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  13. #13
    Supporting Member The Dude's Avatar
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    “Yeah, well, you know, that’s just, like, your opinion, man.”

  14. #14
    Supporting Member Randall's Avatar
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    Exactly. Customer apparently got bilked on this one, thinking he was avoiding the cost of the alternative.

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    It's weird, because it WAS working fine.....

  15. #15
    Supporting Member The Dude's Avatar
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    At least the one I linked comes apart for repairs. Let me guess- a $30 connector for a $20 mic?

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  16. #16
    Supporting Member Randall's Avatar
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    It appears it was clipped from a handheld police/fire/cab mic with an on switch. This manual shows in spare parts as "cable and plug assembly", which is still being sold. It was never meant to come apart.

    http://www.radiomanual.info/schemi/A..._418A_user.pdf

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  17. #17
    Supporting Member The Dude's Avatar
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    What is the intended use? Could you just use a standard 3 pin XLR? Is it possible to change the connector in the microphone?

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    Last edited by The Dude; 02-21-2020 at 02:47 AM.
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  18. #18
    Old Timer Leo_Gnardo's Avatar
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    Quote Originally Posted by The Dude View Post
    At least the one I linked comes apart for repairs. Let me guess- a $30 connector for a $20 mic?
    I see the same connector is spec'd for Shure 545D. Good thing mine is still working! The ol' pistol-grip hi school stage mic has been my fave snare mic for decades - I stuck it back together numerous times, the most recent just a couple weeks ago. The mic looks like Frankenstein with all its patches. But that connector - still rockin' !

    There's something nice about the EV 664/5/6 series too, an old fashioned "warm" tone worth having in any mic collection. Heck if it took a $30 connector to make it work, I wouldn't think twice, just do it.

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  19. #19
    Supporting Member Randall's Avatar
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    "What is the intended use? Could you just use a standard 3 pin XLR? Is it possible to change the connector in the microphone? "

    It is intended to be used in a recording studio, and probably a music video or two. It might be possible to change out the mic to XLR, but I doubt that would be easy. PLus, I never want to change a vintage mic in nice shape. Leave it alone and make a cable for it.

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    It's weird, because it WAS working fine.....

  20. #20
    Supporting Member Jazz P Bass's Avatar
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    You may be correct that 'they were not made to come apart'
    I think the wires where soldered into the pins (like a Fender reverb/ footswitch connector) and then the shell was crimped to lock it.

    The only replacement wire with plug that I could find was a coiled wire type.
    Shure C14C.

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    Last edited by Jazz P Bass; 02-21-2020 at 04:52 AM. Reason: spelling

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    Supporting Member nevetslab's Avatar
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    Switchcraft L(x)MN Retrofit Connector for replacing Amphenol MC4F mic output connector

    Quote Originally Posted by Randall View Post
    "What is the intended use? Could you just use a standard 3 pin XLR? Is it possible to change the connector in the microphone? "

    It is intended to be used in a recording studio, and probably a music video or two. It might be possible to change out the mic to XLR, but I doubt that would be easy. PLus, I never want to change a vintage mic in nice shape. Leave it alone and make a cable for it.
    It's been a few years since I've bought the Switchcraft L3MN Male XLR connectors, but these were made to directly retrofit into any of the microphones that used these Amphenol MC4F connectors, which accepted the 4-pin male mating connector, which had horrible stain reliefs, always requiring repairs. I had changed all my Shure 545 mics that used them with the L3MN, so it turned the mic into a standard XLR Male output as we're used to working with. I've attached the data sheet.

    Switchcraft L3MN Replacement 91-MC4F.pdf

    These came equipped with the knurled locking ring as used with the original mating Amphenol cable connector.

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  22. #22
    Old Timer Leo_Gnardo's Avatar
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    Quote Originally Posted by nevetslab View Post
    I had changed all my Shure 545 mics that used them with the L3MN, so it turned the mic into a standard XLR Male output as we're used to working with. I've attached the data sheet.
    Leave it to you to come up with the miracle solution Nevets! I'm impressed !!!

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  23. #23
    Supporting Member nevetslab's Avatar
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    Quote Originally Posted by Leo_Gnardo View Post
    Leave it to you to come up with the miracle solution Nevets! I'm impressed !!!
    Now, the hard part is finding who still has them available for sale. I seem to recall that was an issue when I had tracked down the four pieces I bought. I don't think you can find them at Switchcraft anymore. I just checked, and I have just these two left, having installed the other two on an EV 644 and an EV 676 mic.

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  24. #24
    Supporting Member Randall's Avatar
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    I just had an exchange with an engineer at Shure, sent him pics. He said they have not used that connector for about 40 years, and they have no info on how it might come apart. I am at peace with the belief that it does not.

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    It's weird, because it WAS working fine.....

  25. #25
    Supporting Member mozz's Avatar
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    These guys would know for sure. Post a wanted to the classified.
    https://antiqueradios.com/forums/vie...2716e7cc1bb7af

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  26. #26
    Master Destroyer nosaj's Avatar
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    Quote Originally Posted by mozz View Post
    These guys would know for sure. Post a wanted to the classified.
    https://antiqueradios.com/forums/vie...2716e7cc1bb7af
    Looks an awful lot like a 4 pin CB connector to me. Any chance you have an old cb radio you could test the mating pattern with?

    nosaj

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    Lifetime Member Enzo's Avatar
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    I think the CB connector is about 30% smaller.

    Suggest: CALL Rapco/Horizon, and ASK them if they still have the four pin screw-on connector for old EV mics like your 664. If so they might sell you connectors or they would make up a cable. I used to sell their cables, and at first I bought connectors and made cables, but they charge the same for materials or made up cables. And any special ones, like RCA to XLR or something were no extra charge, though it might take an extra day or two.

    https://www.rapcohorizon.com/topic/support

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    Lifetime Member Enzo's Avatar
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    And for that matter, SHure made your cable, but your mic is an EV, I think I might call EV and ask after connectors.

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  29. #29
    Supporting Member The Dude's Avatar
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    Quote Originally Posted by nevetslab View Post
    Now, the hard part is finding who still has them available for sale. I seem to recall that was an issue when I had tracked down the four pieces I bought. I don't think you can find them at Switchcraft anymore. I just checked, and I have just these two left, having installed the other two on an EV 644 and an EV 676 mic.

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    Good stuff Nevets! IMO, that doesn't effect the "vintageness" at all. I don't see it as effecting value any more than clipping out a death cap and adding a grounded cable to an amp.

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