• I believe it is, it’s not entirely uncommon to see both described. I’m in the U.S. and been working with audio my whole life, 1/4" is for sure the named standard but 6.5mm is often referenced due to the headphone size of 3.5mm often being called that size instead of the 1/8". Especially if you’re looking to buy online,

    Why headphones are referred to by 3.5mm and the rest (basically) is 1/4" is a silly thing but hey, I don’t make the colloquialisms.

    The only thing you’d want to watch out for is whether your cable is mono or stereo, which is independent from the barrel size, but does need the barrel to have 2 rings (TRRS vs. TRS), to complete the Tip Ring Sleeve connection.

    But yeah, if you need 1/4" and can only find 6.5mm you’ll be fine

    • any idea why jbs headphones do a 2.5 male and 3.5 male wire thing? also ik this is offtopic but im looking for headphones that i can use with my audio interface (ive an adapter if needed) and are wireless (so both wired and wireless in one). thoughts? (professional musician btw)

      • IIRC theirs are set to 2.5mm at the headphone with 3.5mm as for the device connector. This is pretty common for companies that want to make some form of proprietary connection.

        Usually these decisions are media because proprietary connections make them more money selling three or four components of 0.02c cables turned into $5-$25 sales per cable. From a consumer perspective, the only upside to it is that having a replaceable cable can increase longevity, and I suppose from a company perspective in order to ensure 100% compatibility, best to sell your version. That way any 3rd party cables can be the problem.

        I think 2.5mm used to be used more commonly on old dumb phones for those headsets and stuff like that. I still see them sometimes but these days it’s mostly present on dual plugs like walkies, which is pretty much for mic and audio with a locking mechanism to keep it in place.

        Currently I don’t have any suggestions for wired/wireless headphones, I wish I did. At the moment my set is the Beyerdynamics DT 990 Pro, I was looking into a version with detachable cables but none that I came across also had wireless - though they’re surely out there. It would be nice to have a set to swap between Bluetooth and plugged in.

        • Currently I don’t have any suggestions for wired/wireless headphones, I wish I did. At the moment my set is the Beyerdynamics DT 990 Pro, I was looking into a version with detachable cables but none that I came across also had wireless - though they’re surely out there. It would be nice to have a set to swap between Bluetooth and plugged in.

          if you find some online please tell me what model, you know muxh more so id greatlt appreciatw it