BeoLab 8000 fabric and settings

Hello!

I have two pairs of Bl8000 and I was thinking about selling one pair but haven't decided yet. I tried them all yesterday and noticed that they had different fabric covering them. One lighter and more black, and one pair has a thicker fabric that is not equally black but still quite black.

I wonder what the difference is. I like the extra dark color but the other one goes better with the black color of the stand.

I also had one of the pair repaired with new amps. They sound good but the high frequencies seems to be cut back a bit compared to the other (might be placebo though). Can I adjust the tweeter volume by a potentiometer inside the chassis?

And, should I sell them or do you have any other suggestions?

I now have BL9 fronts and two Bl8000 surround.

I also have spare BL4000 in my study. They sound quite nice too. Maybe sell all BL8000 and use them as surrounds?