Mini-XLR is a connector, and can be used for anything.  In your case it's used for ground/left/right and there is apparently no standard for the pinout, as seen here on reddit:
https://www.reddit.com/r/headphones/comments/rxex6h/is_there_a_standard_for_mini_xlr_pinout_akg/

As one of the commenters points out, there _is_ a standard for XLR to TRS (Tip Ring Sleeve, aka 3.5mm or 1/4" connectors with two black stripes) in the case of balanced signals.

Balanced signals are mono not stereo, and "hot" and "cold" are the two terminals of a single audio channel.  But in your case, you're dealing wtih a stereo signal that is NOT balanced.

Either way, it seems that pin 1 of your mini-XLR is going to be ground.  You can test whether your headphones have pins 2 and 3 as left and right, using a multimeter on diode-check mode which will create a click in the appropriate ear when connected.  If you bring the stuff tomorrow night we can do it together!

-jake

On Mon, Dec 2, 2024 at 10:22 AM Nicholas Sun via sudo-discuss <sudo-discuss@sudoroom.org> wrote:
Hi all, I've been trying to find a Mini-XLR Female to 3.5mm Female adapter but I haven't been able to find one. There were a few on Amazon but the reviews all said the left and right audio were reversed...

My current idea is to instead purchase a Mini-XLR Female replacement head and solder on a 3.5mm Female head with attached cable. But I see different cable styles attached to the 3.5mm, there is a 2 cable version and also 3 cable version? And it sounds like this is Mono vs Stereo? But the XLR talks about "Ground, Hot, and Cold" and I can't tell how this maps onto the 3.5mm cabling? If we have any people knowledgeable about audio cabling would love help untangling this mystery, thanks!
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