[Chromisdesigns]

I'm looking for something to roll up my headphone extension cable when I am not listening.  As opposed to hand-coiling it, with the inevitable tangles and kinks after a few times, or winding it around some kind of form.

Audiophile grade, of course, would be best...

Closest thing I have been able to find so far is this (they also make an instrument version of this, which is probably very close to what I want -- not sure about the "brushes" they use to manage the rotation, though -- is that how all these retractable-type reels work (power, air, lubricant hose, etc?  Guess they do need some type of rotating coupling in there...)

http://www.stageninja.net/audiocables/retractablecables-26.html

There are some available for short, 3.5 mm type cables (not what I want), and this (which is close, but too short): 

https://www.youtube.com/watch?v=E_hVOFpa31w&feature=related

There is at least one online tutorial about making a retractable USB cable device by converting a retractable dog leash.  However, most of those are either flat tape or very small cable. 

Ideally, I'd like to find/make something that will hold the 20' extension cable I use with my HD600's.

[eclein]

I'm pretty sure your gonna be the inventor!! Lol... I've seen small versions and the dog leashes you mentioned- which would be too big for me. If you find one out there please let us know ok?

[Chromisdesigns]

I'm pretty sure your gonna be the inventor!! Lol... I've seen small versions and the dog leashes you mentioned- which would be too big for me. If you find one out there please let us know ok?

Stage Ninja does make one with a stereo cable (Model INS-26ST)--might give them a call and see how much it would be with a female phone jack instead of dual males.  Amazon sells the mono version for under $30, which isn't a lot in terms of what we often spend on tweaks to our systems.  If Stage Ninja's price for a male-female stereo cable isn't ridiculous, maybe I'll give it a try and report back.

http://www.stageninja.net/audiocables/retractablecables-26.html

[eclein]

Stageninja will make one for ya I would think, I'm curious as to how much they charge?
Good luck, hope it works for you.