The Koss Porta Pro Limited Edition Rhythm Beige Headphones with Microphone are high-quality on-ear headphones . I will also include a Bluetooth adapter so you can use it with modern devices.
eBay
Extra Thick Earpads For Koss Porta Pro PP KSC35 KSC75 KSC55 Sporta Pro SP Ear Pads For Gaussian For KOSS PP Headphone Case
Aliexpress UK
Made in the USA in 1971. We have not tested the headphones. Headphone pads slightly warped. Khaki brown colour, model number K/6LC.
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Carrying Travel Headphone Case Bag for KOSS Porta Pro PP Headphones High Quality
Aliexpress UK
Retro KOSS K/6ALC Brown Plastic Over Corded 6.35mm 1/4" Audio Headphones. Nice peace of history - good condition retro earphones - probably needs a better clean (I'm not very good on that). That red metal bit has loose can see in pictures - still in place. B-1
eBay
Replacement Headband Part For KOSS PP Portable Portapro Porta-pro Top Cushion On Ear Headphone Headset NO Logo NO Speaker
Aliexpress UK
Faulty: one ear silent. Includes only what is shown in photos. Unit only. No accessories. Minor marks.
eBay
替换 Cushion Earpads for Koss Portapro Headphones
Aliexpress UK
The Ultimate Portable Headphone, comfort and convenience combined. Designed for those with refined musical taste, the Porta Pro continues to be one of the most popular headphones around the world. Koss Porta Pro Classic On-Ear Headphones Black.
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Replacement Foam Ear Pads Soft Cushion For KOSS Porta Pro PP KSC35 KSC75 Headphones EarPads
Aliexpress UK
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New 6Pcs Thick Foam Earpads Cushions Ear Pads for KOSS Porta Pro PP KSC35 KSC75 KSC55 PX100 PX200 Headphone
Aliexpress UK
The Supreme Koss Headphones Porta Pro Silver are stylish and high-quality headphones designed for DJs. With a sleek silver colour and an adjustable headband, these headphones provide both comfort and personalised fit. The ear-pad design and double earpieces ensure immersive sound quality, while the 3.5mm jack connectivity makes them compatible with a wide range of devices. The iconic Koss brand name guarantees the reliability and performance that DJs need for a seamless audio experience during their performances or mixtapes.
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Replacement foam Ear Pads Cushions Cover for KOSS Porta Pro PP KSC35 KSC75 KSC55 headphones
Aliexpress UK
The Vintage KOSS K/6 LC Stereophones Headphones are a classic pair of over-the-ear headphones from the 1970s, featuring a tan color and adjustable headband for a comfortable fit. With a frequency range of 10-16,000 Hz and stereo band, these headphones are suitable for studio monitoring, DJ, and live monitoring applications. They come with a coiled cable and volume control, providing a retro feel with modern functionality. Made in the United States by the renowned brand Koss, these headphones offer a vintage look with quality sound for any audio enthusiast or collector. Untested but appear to have been minimally used.
eBay
35DIY Unit DIY Ear Hook DIY MMCX Plug Headsets Stainless Steel Head Beam Sound Quality HIFI Bass Comfortable For KOSS Headphones
Aliexpress UK