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Low key shots always work! Great!
While not directed at me I've used MMCX connectors in the past and over time they are quite unreliable in my experience. Originally got them for my SRH-1840 but tried them on a 3D printed set of cups w/ Nhoord Red V2 drivers and while the cable worked for a few months after that the connection was always cutting out so after replacing the MMCX connectors 2 more times and only getting a few months of use I've changed over to SMC jacks which to me have been able to last for 5 years so far. The MMCX connectors seem to be great for IEMs since the cables are quite thin and light so there is much less strain on the connection.
@DavidA thanks for the reply, I have a pair of Shures and I was thinking I could just use the same cable for both.
I've also looked into SMC connectors and all the ones I can find are for panels. Do you know where to get ones good for Grado's?
For the cups I use panel mount jacks from Vetco, a bit on the pricy side but well made. If you look on ebay don't get those with a removeable center pin since they are hard to work with and like the MMCX center pin they tend to get lose over time.
Yeah, mmcx connector can be unreliable, but there's a way to fix them once signal cutting occurs. Now I don't really have much real life experience, but I assume that it's almost always center pin which becomes loose on connector side. One mmcx connector I installed on my Hifiman RE400 iem had this issue. I fixed it by manipulating center pin in connector. Center pin or more like center pin socket is made of two halves and pin in mmcx plug goes between those. I believe over the time those halves become more apart and gap between them becomes larger, that's the moment when signal cutting starts to occur. So solution is actually pretty simple: examine the direction of gap so you know the position of halves. That's very small so magnifying glass and good light can help. Once you know the direction of gap, you'll need some very tiny tool you can use to push the other half towards the other thus making gap smaller again. It must fit inside connector easily so you won't harm the connector. Pushing force should be very gentle as you don't want to bend whole socket part, but only the half you're pushing. So basically you don't feel actually bending it at all, it's so tiny movement. If connecting issues continue then use tiny drop of electronic contact cleaner. I took macro photo of mmcx connector of my Grado so you can see the idea what I described:
Thanks, you nailed it. MMCX connectors can be troublesome in time indeed, but there's no rule with them. Some can work for years with no issues.
Yea, I have had Shure srh1440 since 2013 and never had any issues with its mmcx connectors. Then again brand new mmcx I installed had contact issue right away. But for me mmcx gained reliability when I figured the way to fix the contacting issue.
Are there any US-based companies doing really nice metal cups / driver sleeves?
Not that I know of. The best quality I have seen (and I don't think they make sleeves, but you can ask) was a few pairs of outer cups I had Elleven Acoustica make for some of my customers. If you're determined to get something based in the US, I would start looking at local engineering/fabrication shops. Some will take on small, one-off jobs, or be happy to make a small run for you at a reasonable price. I found a local guy who was willing to give it a go, but he never followed through despite much patience and persistence on my part, so I eventually let it go.
Greetings from Spain.
Some time ago I bought some aluminium sleeves from the forum partner @ambchang , very, very good.