Sennheiser IE 100 Pro Wireless Clear

This is nicely made, adaptable (wired or Bluetooth) and ideal for its intended use - which is monitoring music - the clarity and sound stage are both excellent, you can follow each instrument and hear every flaw. Its pretty ruthless with any sibilance, distortion etc. On well recorded tracks you can here studio / room acoustics, sometimes even how the mics are set up - which is impressive.

But I got this for listening to jazz / rock / contemporary music on the move, for pleasure - and for that it is not so well suited. Even messing with the EQ its just too analytical, too harsh, too shouty. It lacks warmth and musicality. The sound is marginally better wired, but Bluetooth is my main use case.

The mids and highs are very crisp, but the low frequencies don't extend that far, listen to anything with double bass or church organ and it can be hard to know which notes are being played sometimes. FWIW it is better with well recorded Acoustic or Classical and pretty decent used as a headset with voice calls (only tried in a quiet office so far).

FWIW my comparison headphone is Sennheiser HD600, which is pretty revealing too, but much more flattering of the music - and I love them to bits