I agree that either they are counterfeits ( be careful on ebay), or, more likely, you are not getting a deep and totally sealed ear fit. I found using the comply T-100 foam ear tips dramatically improved the sound. They come in different sizes: make sure to get the ones that correspond to the size of rubber ear tip you get the best sound with. With the comply ear tips, I get tight, good bass, and the highs are very clear and crisp, not harsh.