Blown Speaker?
 

Hello, bellow there are picture of my SWR Redhead Speakers, are they blown, the sound is really buzzy and I´m asking because I do not know if it results from the speakers or from the amp?

That's called cone crease and it's an indication that the speakers have been over exerted. It definitely affects the sound, especially at gig volume. I had the same problem with my Redhead. The speakers can be re-coned if you have the time to send them out or you can find direct replacements on ebay.

Thanks testing1two