Instruct: Classify an Amazon review as either positive or negative.
Query: poor quality...

These Grado SR80is started out OK but soon (about 1 week) developed a crackling distortion in the left ear.I returned them for repair but the crackling was back in the left (repaired?) driver after a few days. Not wanting to return them again and pay more I tried to bear with it but it got worse. It would completely distort and eventually lose volume altogether, while the right side remained ok. Now the left ear doesnt work at all and a slight crackle is developing in the right ear...so I can't use them. I feel like I was taken for $100 + shipping costs for repair.I have a pair of cheaper Sonys that work without a problem on the same system and same music but I use those at work because they are closed design.These are definitely not good for bassy music.I consider this fair warning.I know i will not be buying another set of Grados.