Good bass response. Not a simple break either. Youd think with the glowing reviews and the HD1 moniker, maybe these IEMs would have the new relaxed sound of the new HD1 over-ear headphones. This is such a cute piece and so functional. Its unobtrusive, doesnt stick out to far, almost disappears when not holding a towel and I am really really pleased with it! Our son leaves these! If you can get past these issues then know the sound quality was decent for the money and they were convenient. I bought it specifically for its size for a small space. But I heard that one is horrible, so Im not missing out. Would love to order more colors.