Heavenly sound

Due to the good recessions and because I got it cheap, I got myself the KOSS Pro 4AA Titanium.
Mainly I want to use it on the PC together with my ASUS Xonar Essence STX. The soundcard met but only after the headphones at me, so I have first tested it with my iPad and was once horrified. He sounded here totally dull and quiet and also play around at the sound settings did not help here. Now the iPad has probably not the power of these headphones ....
Next, I connected it to my Sony AV receiver and again inveigled me the Star Wars soundtrack.
That was much better and the sound was pretty balanced, but still quite bassy.
It should be noted that it is this is an entry-level AV receivers, which generally provides not satisfied me.
Yesterday my ASUS Xonar Essence STX arrived and was installed directly. After reading a little guidance and play with the settings I had a sound that eg Vangelis "Conquest of Paradise" or the "Four Seasons" by Vivaldi gave me the creeps. A crystal-clear, balanced sound, as I have also expects other recessions ago.
This headset requires a correspondingly high investment / sound card that contains a good headphone amplifier, otherwise he can not develop his really good sound.
The headset is quite difficult to sit with me and was not unpleasant but perfectly even after a few hours. However, it starts on the ears quickly to sweat ...
The headset is made entirely of plastic, but looks still high and stable.
I am very happy with the headset and highly recommend him!