Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 6 Months of good sound, then ...

I bought this in April after getting a pair of KLH "twisty" speakers. It ran fine, sounded great and then blew the fuse.I replaced it and it ran fine for a couple of hours, then blew again. Replaced the fuse after checking cable, settings etc.It makes a loud humming noise even without anything hooked up to it, and the heat sink on the amp section gets VERY hot. Won't buy another KLH powered sub again.