The Koss Porta Pro corresponds to my listening habits. Something basslastig he otherwise has a balanced sound that is surprisingly bulky for its size. I use it in combination with the AQrchos Gmini XS 202. An excellent team. Sonically, the two, as if they were coordinated supplement. In direct comparison with the Sennheiser PX200 immediately noticeable that the Koss Porta Pro is much lossless and far superior in terms of volume. Also the Sennheiser sound much flatter when a little more detail and more neutral but reflects the music. The design of the Porta Pro is too conspicuous, as that could leave it unmentioned. Since even the cheap plastic processing matches the 80s look. For this he is then in practice but surprisingly stable. At least more stable than it acts. The Porta Pro was not perceived as beautiful 20 years ago and it has never been in the course of changing fashions. He sprayed the naive charm of progress and technology lovers, time, who had their own ideas of what is futuristic. The rickety metal bracket guarantees a steady chirp by the hair, which he here quite often with a captured hair adorns himself. Perched one forgets him quickly, so comfortable sitting Porta Pro. To feel easily and without a press, I'm on flights or in bed at night often fell asleep with him. Furthermore, it is small and easy to stow. The supplied bags is to store certainly not optimum, but does the job and protects the headset sufficiently. Also, it somehow fits very well with the rest. The Koss Porta Pro gets by me despite its little quirks 5 stars because I'm in love with him. No way I would want to replace it with another headset. So I am a row in the existing cult. And if he has once again plucked me when putting a hair, let me be sound so quickly forgotten. The Porta Pro lets his enthusiastic supporters will hear a deep bass and a sound volume perceive how this is technically impossible. This is an expression of enthusiasm that truly makes him a Klangwunder ;-)