Koss Corporation - Wikipedia
Massdrop x Koss Porta Pro X On-Ear Headphones — Noise-Cancelling in-line Microphone, Activate Voice Assistant or Skip Tracks with in-line Remote, Collapsible for Maximum Portability (Midnight Blue) : Electronics
Voarmaks Premium Foam Ear Pads Cushions Compatible with Koss Porta Pro PP KSC35 KSC75 KSC55 Headphone (All Black) : Electronics
Finally thanks to this subreddit I have resurrected these Koss Porta Pros. I replaced the drivers and the wires to bring this beauty back to life. Thank you people. : r/headphones
Wireless version of the classic Koss Porta Pro headphones could be on the way [Updated]
Broken Koss Porta Pro hinge. Can this still be fixed? : r/headphones
Koss x Retrospekt P/21 Retro Orange Foam On-Ear Headphones
A MODERN UPDATE ON A KOSS CLASSIC – Koss rocked the music world in 1984 with the Porta Pro headphones Now over three decades later we've brought this
Massdrop x Koss Porta Pro X On-Ear Headphones — Noise-Cancelling in-line Microphone, Activate Voice Assistant or Skip Tracks with in-line Remote
Designed for Deep bass performance Comfortable, secure fit with adjustable headband and multi-pivoting ear plates Two adjustable temporal-comfort zone
Koss Porta Pro Black On-Ear Headphones, Retro Style, Collapsible Design, Case Included, Black