I have the Sennheiser IE 7 already almost a year, and I have repeatedly tried and set aside again frustrated. Of all the essays nobody has optimal fit in my ears. Sometimes I briefly get a great sound when I slightly pushed the earpiece with your fingers against the ear. Without fixing with fingers immediately the bass very thin and the sound was generally too shallow. These included bracket did not help. Now I happened across the Comply Foam Tips here at Amazon hear and ordered the trial pack with 3 sizes. The result is a stunningly great sound of earphones with my Sony mp3 player even at low volumes. And the portions are comfortable and hold on its own in the ears, nothing slips. ***** I'm finally happy with my in-ears *****
