I'm on my second pair of these headphones. First pair still works really well but there is a slight distortion out from the left phone when volume is loud. I do loud quite a bit so that was a problem. They worked flawlessly though for 2 years. I'm actually surprised they lasted that long and like I said, they are still very usable. I will buy again in two years if the current pair becomes defective in any way. I used to use the K240's. Used them for years. Blew out pair after pair but I didn't mind because the sound quality was great. The overall sound quality of the K702's blow them away though bigtime. Once you've tried these open end technology phones, you will "NEVER" look back to anything else. I've always been a headphone man for my work in the studio. I record, mix, and master professionally using these headphones along with my 350 watt pyle studio monitors in my modest but very powerful home studio. I've signed contracts with producers, publishers, etc for many, many tunes some of which are aired worldwide, movie trailers, etc... All that just to say, your money is well invested in a pair of the K702 headphones.