Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Defective wiring- don't buy

I have owned two pairs of these headphone. Each pair has developed the same problem after about 90 days (just after the warrantee period). The right headphone speaker shorts out and stops working. After taking both pairs apart I found that Sony knots the wire inside the headphone to prevent it from coming out but in the process damages the wires inside causing a short. My advice, don't waste you money on these.