No offense taken. When I first noticed it was a 2.5 jack, I was a little disappointed.No offense intended but trust Bose to use a cable that just about no one else does.![]()
Back in the 70's, they pretty much all came coiled. You had to add an extension cord so you did not have them tugging at your head. There is a reason why they no longer include that type of cord.Think carefully about a coiled cable. I tried one years ago and quickly gave up on it.
While the idea of the cable being coiled and stretching to only the length needed sounds good, the key word here is "stretch". it requires a tugging force to cause it to extend. That tugging force is transferred to your head/ear and you have to hold the cable so your head can remain at a comfortable angle.
It must be made to only plug into a Bose source. I've never heard of a 2.5mm plug.
Terrific! I will check that out. Thanks for the tip!More common than you think, just off the top of my head Kef and Sennheiser use a 2.5mm plug on the headphone side. I picked up a nice, not coiled, ebay 2.5 to 3.5mm cable for under $20 as in my case I wanted something shorter.

Terrific! I will check that out. Thanks for the tip!