I've seen Lemo connectors come up occasionally on here, especially since the HD800 connector is a custom Lemo.
One of my favorite features is the push to connect pull to disconnect with positive locking. On the male connector there are two fingers that latch onto slots inside the female connector. No worries this connection will come undone accidentally without destroying the cable. I happen to think they look quite cool too.
I figured since I am quite fond of the connectors and they are fairly small I would post up some pictures and briefly detail them. This may dissuade some people from trying to use them in a mod and that's not a bad thing, they are expensive and have very small solder cups.
Here goes:
For anyone not familiar that is a female panel mount Lemo (EGG 0B 4 LV pin) mated to a male cable mount (FGG 0B 4LV pin). You can see the red reference dots on the connectors to make sure you line up the registering pin correctly, like XLR connectors these are not rotatable unlike TRS connectors.
I chose some 6x26awg spiral shielded cable to make the 3m headphone cord. On the other end I terminated the cable in a 1/4" TRS Neutrik connector.
Here you can see both ends of the cable, the Lemo is quite small, they do make smaller connectors but this was a size I had readily available and it's appropriate for the application.
You can also see the quad twisted wires coming off the panel mount connector which will connect to the left and right drivers once I finish the project.
Since I had 6 conductor wire I decided to go with it and double up on every conductor, honestly this makes the job harder and doesn't have any benefit other than being more consistent with the doubled up wires in the main cable. Here I soldered a total of 8 26awg wires paired on each of the 4 pins, they fit up to about 22 awg happily, 2x 26awg is a little big.
Some heat shrink to prevent any shorting but mostly for aesthetics.
Here's the doubled up wires from the cable, I soldered one pair for the ground to pin 3 and the shield to pin 4 then bridged them with some solder, this makes sure both channels have nearly identical impedance in the cable. Nit picky but I didn't see any reason not to. I could in the future use this for a balanced cable since I do have 4 pins connect in pairs to the drivers. However this is strictly a standard cable with TRS on one end.
You can see how small those solder cups are, that's 26awg wire, I made my life harder by doubling them up but it wasn't too bad. You can also see the cable clamp chuck which provides excellent strain relief from pulling out at the solder cups. Again these are definitely high quality connectors.
So that's Lemo connectors at a glance, they're very nice and quite small. This sizes I believe is available up to a 7 pin version but the pins get even smaller. They also come in 2 pin and 3 pin for dual entry and single ended single entry.
I also want to recommend the GRS third hand clips that you see in the pictures, they make working with this smaller stuff a lot easier. They position well and have good holding power.
For reference, all the soldering was done with 63/37 rosin core .015" solder and a ETA tip on a Weller WESD51 soldering station set to 581F.
Tip:
I just got a pair of 770Prems as well, thinking about doing the same to them but single entry.
Buy individual strands lol... Costs more so maybe not worth it lol not to say I didn't splurge on nucleotide DHC cable... :-\
