That is really interesting. I had the exact same experience.
I bought these cans at a local audiophile shop.
That is actually a great story. In my city, all the small, specialized, electronics shops went bankrupt due to tough competition from a European (sort of) Best Buy chain store. The chain stores had lower prices, but worse inventory and service.
Now like 8 years after my favorite HiFi store went bankrupt, a new shop opened. They have everything on display. From electrostatic headphones, custom IEM’s, massive speakers and obviously these cans.
I compared multiple headphones for about an hour. The employee was the absolute best. He showed me, and demo’ed me the difference between closed and open cans. He let me listen to multiple headphones and asked me what I thought about the sound signature. I tried like 10 different pairs of headphones, before ending up with this B&W P7. Then he advised me to try out these headphones in a special listening room on an amazingly comfy sofa for a couple of hours in order to discover if I liked the sound. At first I thought the mids sounded slightly artificial. But then they started to grow on me.
Now wearing them for about 5 hours, I have fallen in love. I actually have a 60 day return period just in case I don’t like them. Oh and a 5 year warranty. And if that wasn’t enough, if it breaks in my lifetime after the 5 year warranty, I still get a 50% discount on a new set.
I actually tipped this guy. The first time I ever did so in a store. But this was just, amazing. I was completely happy when walking out, just for being treated nicely.
But I digress. The mids are really weard. At first I thought they were artificial. But now I have gotten used to that sparkle, and I love it! It sounds kind of like the mids of a proper speaker.