Dali Zensor 7: grill on vs grill off

Dali Zensor 7
Denon x2000
Magnat supreme 302a sub
Sony kdl43w808c
Optical output from TV to receiver
Recorded with Samsung C5
Sub turned off at 4:35

[pann]

That's normal that tweeter will sound a bit less bright, it's not a big change but always

[tudajfor]

I did not hear a difference and I intentionally did not watch while listening on my headphones!
Is there a difference?

[Tom-Lahaye]

Very small difference, you will need decent headphones to hear it.