Fone de Ouvido Over-Ear UR 40 - KOSS - Eletrosates
UR40 Over Ear Headphones - Koss Stereophones
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I guess it's time for me to post my Koss ur40 headshot featuring my Indroscopic. Dynmeptrophy. ilianus. Ovursur. Tribenthaunmarht mod, I.D.I.O.T for short. : r/headphones
Koss UR40 headphones - review and audio dB test - YouTube