«  Anticipated problems after several months of use »

After a little more than a year of service, a speaker on the two that I bought no longer wanted out of her, and it randomly. It works a few minutes, stops, it starts again ... or will not restart. He even got me to connect to the beginning of the service but no sound came out.
After-sales service at Le Bourget. Change soundcard. Following delivery, a short week after repair: not any sound!
Today is the stress representation before: will I have a speaker or two to work? The second one she will not let me down?
So who wants to buy.