I have waited 2 months before writing a review. Like many of the reviewers, I found these earphones have excellent treble response. But when compared to my previous Sennheiser PX250 headphones the bass simply didn't compare.
The crucial thing with this type of earphone is to get the fit right.
I tried "3 flange" eartips first and was hugely disappointed. The foam tips vastly improved the sound and I stuck with these until they disintegrated last week but then I found the small "2 flange" eartips in the pack. This suited my narrow ear canal perfectly. The result - a superb soundstage between your ears, that picks up details in your music collection that you never knew existed. I love a bassy sound particularly for R&B tracks, and now that I have the fit right, these headphones display a crisp, rich and clear response. That said, you hear the bass rather than feel it so it might not be everyones taste.
You might not delighted with the first listen but try out the different eartips and find out what works best for you, only then will you get the etymotics experience!
I am glad I stuck with them. A great product particularly at the price Amazon sell them for.