Slater
Headphoneus Supremus
Do you mean this one? I have it and love it... more than the C630 which I gave to my husband. The shell looks identical but the cable is different and like you said it is one dynamic driver. Nothing wrong with that
https://www.amazon.co.uk/gp/product/B01N6J1UQ2/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Yeah that’s one of them (I’m sure they go by a few names). I don’t own it myself, so I was only going by comments about it not sounding as good. You are only one of a handful of people that have them!