A very versatile pair of earphones that sound great

These are very good earphones, however like all earphones the ear-tips must be of the correct fit and provide a good seal in your ear canal, otherwise these will not perform to their full potential. Buy some ear-tips yourself if none of the provided tips provide the seal that you're looking for. A few tips: try using the biggest tip available first, and to get them to fit well, also gently pull on your ear while inserting the earphones, releasing your ear once the earphones are in place. You should hear a "vacuum" of sorts if the ear-tips are sealing properly. In addition, these benefit tremendously from an external DAC, like any good set of earphones. Get a DAC (the FiiO Q1 Mk II is very good) if you want to hear these pair of 'phones at their very best. Also, ear-tips aren't that prone to falling out, especially on my model, although admittedly I only recently bought them so only time will tell. I also cannot comment on the construction quality since I've only just bought them a week ago but they seem alright as of now.