The Cyrstal model is quite different from the other HighSoundAudio earphones I tested.

Bass is really poor, probably the worst i've heard from a canal phone. Bass extension and impact are both really poor - you can barely hear it.

The midrange is good, reasonable clear, but nothing remarkable.

The highs are another problem. They're are really strong, far too strong. It initially comes across as having lots of detail, but after ten minutes of listening they seem quite shrill, almost painful.

Overall the almost total lack of bass and the very strong highs make this a poor headphone, and one I can't recommend at all. If they can tone down the treble and give it more bass then they might have something.

HiSoundAudio supplied earphones for this review.