I've been having second thoughts on the kvadrat covers...
After listening to my Beoplay A6-without the wool cover,
I've realized that it sounds considerably better.
The cover muffles the sound and it doesn't let the A6 perform the way it's meant to be heard. I've heard some complaints here on how some people think their A6 isn't that great in the sound department.
Or that the A9 is much better. Well the A6 has newer drivers and I'm sure they wouldn't release something inferior to the A9.
So give your A6 a try without the wool cover and listen to it deliver rich ,pristine sound.