6:34

Koss KSC75: cheap audiophile headphones

8:54

Upgrade Your Koss Porta Pro With Detachable Cables

38:45

Headphone Tuning / Modding basics with the Sony MDR-ZX110 Amazon's most popular wired headphones

23:26

Ce que les géants de la photo ne vous diront jamais

12:49

The Koss Holy Trinity: Better Than Your $150 Headphones.

8:47

I Made Headphones Inspired By $100,000 Speakers

12:54

Avis sur Susvara

12:20

KOSS + YAXI PADS = SUCCESS?? (Ultimate Koss Comparison Pt.2 including KPH30i in Clear)