Instruct: Classify Amazon reviews into positive or negative sentiment
Query: majeur problem with the sub-woofer

I bought this system through buy.com first and received it at home defective: the sub-woofer doesn't switch on (zero light, not even the red one while waiting for shynch). So I returned to the system to Buy.com and decided to buy it from a more reliable website ==> Amazon.comUnfortunately the new system has the same problem.. and I made sure it is not my mistake while I set up it...So now, I will bring it to the reparation center. Otherwise, I would spend the shipping fees and loose it for the second time.Hope this story will help you.Emanuele