Very good sound, poor workmanship

I own the Koss Sporta Pro for 1.5 years. Technically sound it is absolutely worth the money - the clear and balanced play has no equal. As open headphones, it offers only limited insulation from outside noise, which interferes in the subway, on the road can be very useful, however.

Now, however, the big drawback: Contrary to expectations, the quality manufacturer Koss product is poorly processed. In the 1.5 years I had to exchange the unit 2 times for Kanelbrüchen and mounting defects. Koss gives a lifetime warranty and the exchange went always easy, but it's still annoying.

Can therefore only conditionally recommend the headphones.