Instruct: Classify the given Amazon review as either positive or negative.
Query: Poor Sound System - Low Humming and Static Noise

We have the TV for 6 months now.The persistent humming sound spoils our TV watching experience. We tried DVD and other inputs such as video games and Karaoke. The humming noise is presistent. The static noise come with HDTV programs. DVD seems to be fine.Purchase extented warrenty if you must have this TV. By default, Magnavox only covers labor for the first 6 months, although parts are one-year under warranty.We've had many TVs over the years. The Magnavox 37" LCD has poorest quality. We would not recommend it.