Beolab 2 issue?

Hi, 

Picked up a Beolab 2 and it has this ring/inprint about 5-7 cm diameter in the center of the bass driver, and i dont know if this is an issue or if it is normal. It was not visible in the picture or the light i reviewed the unit in, so i bought it and now i am a bit concerned.

So what do you think? Can i relax or should i be worried there are issues with this sub?

 

regards

Espen

A picture would help

Ok, not sure if i can get it to work, but ill try.I was unable to load from site library. 

Looks like it has been placed with that side up and something has been standing on it?

I would jus try it on low volume and gradually put it louder. You will hear if something is wrong