Purchased on march 7th, so the 5 year warranty is valid from this date. best headphones i've heard, very even treble and deep bass extension, takes eq well, because of planar like low distortion even in the sub-bass region, and very comfortable.
Beats any other headphones i've heard for fps gaming too (dt 770, 990, lcd2c, hd6xx)
I rarely use headphones nowadays, thats why i'm selling them.
Measurements and more info:
https://diyaudioheaven.wordpress.com/headphones/measurements/ollo/s5x-1-0/
I might be interested in a trade for some specific iems, feel free to make me an offer.
Shipping cost is to be negotiated based on location, , i'm in Hungary, EU.
I have an openheart 2.5mm balanced cable and an e1da 9038s if you are interested.