Do not use for music AS or A Levels, avoid using them for anything like a focusrite as you have to keep the little button held down in order to hear the full audio. For phones they work well but they aren't the best.

Excellent product but yet to be tested on an aircraft which was the principal reason for purchase.

I bought these to help me manage the distractions of a sometimes noisy open plan office. I've found them to be very effective and provide good quality, balanced sound.