Hi  ANTONISX,

welcome to Questions & Answers..:smileyhappy:

Are your speakers placed in direct sunlight.?

However as you are not happy I would suggest returning your CFD-RG880CP to the retailer as I wouldn't be to impressed if my speaker foam surrounds faded after such a short time..

As to the dust I'm not sure but I don't think it's a sealed unit but perhaps your retailer can advice further..

Also hope you don't mind me mentioning as you may not be aware but typing a question on a forum using Capitals (UPPER case) is considered shouting..:smileywink: