Configuration:
- MacBook Pro
- USB soundcard
- Sennheiser In-Ear Headphones
After hearing about 1 1/2 minutes on music I had the strange feeling that my ears are warm. Have the headset briefly taken out and "touched", in fact, which are warm. Did they then still further tried another 2-3 minutes, then it was me but too unpleasant. Not that the headphones would be hot, so you would have to worry about burns or melts the plastic, but it is very uncomfortably hot in the ear. By the way, I can not imagine that such a heat development is good for the life of me headphones.
I am absolutely dissatisfied with the product, therefore, since I can not use it for my purpose and therefore the sound card goes back to Amazon.