About his "modding" your wired headphones to wireless using ES100..
I did that and would like to publicly thank jasonb for making my life so much more enjoyable. I do not know if it was originally his idea, but being vocal about it and posting excellent pictures caught my attention. So thanks man!
I have followed his footsteps and used Velcro tape to attach ES100 to my K712 Pros. Here's few pictures:
I use 3.5 mm unbalanced connector with these headphones. I have also short 2.5 mm balanced cable that I'm going to use with my Sennheiser HD 598, but I haven't found the time to set up those yet. So pics to follow of those later, if anyone is interested.
And about the cables. I also ordered that 1 meter long balanced Sennheiser - 2.5 mm balanced cable from somewhere, maybe Ebay. Did not cost too much, but was way too long.
Then I found
OIDIO sound. Man was I happy.
They have 3 different cables / qualitys, 20+ colours and (at least for AKGs) 10 different connectors you can choose from. Different qualitys, straight, angled, whatever. So I ordered the cable you can see in the pictures for my AKGs.
I also asked about a cable for my Sennheisers (which have unique connector at headphone end) and they bought OEM cable, shortened it to requested length and attached a source end connector of my liking to other end.
Ended up paying just over 100 USD for those two cables, including shipping (For orders over 60 GBP shipping is free). Not bad as far as I'm concerned.
And just to be clear: I do not have any relation to OIDIO, did not receive any discounts to post this "ad", nor was it requested by them, or anythink like that. Just a really, really happy customer sharing joy