Koss Porta Pro Limited Edition Rhythm Beige On-Ear Headphones, in-Line Microphone, Volume Control and Touch Remote Control, Includes Hard Carrying Case, Wired with 3.5mm Plug, Rhythm Beige. $59.00. Buy On Amazon. Koss Porta Pro On Ear Headphones with Case, Black / Silver. $39.00. The Koss Porta Pro has a long-standing history dating back to its introduction in the mid-1980s by John C.Koss Inc., a company renowned for their expertise in audio technology innovation.This classic headphone design quickly became popular due to its unique blend of comfort, durability, outstanding sound quality alongside a reasonable price point. Likes. 10. This is usually caused by hair and dirt and such that gets under the pads and in the drivers. Take the pads off your Portapros, take any hairs under the pads and on the driver off, then gently blow in the drivers to get rid of anything else. Put everything back together and this should fix the problem. Support. Tools and information to help you get the most out of your Koss products. Contact Us: M-T 8am to 4:30pm, Fri 8am to 3pm. 1.800.872.5677. Contact Form. I especially love listening to old mono Motown records or even "poorly" recorded/mastered albums like DJ Shadow's "Endtroducing" on the Koss' over a Hi-Fi setup because it can smooth over the harshness. An alternative to the Parts Express headband would be to buy a Koss SportaPro, remove the drivers and snap them into the KSC75 ear clips. Koss had never been very good about advertising their lifetime warranty, so I bought another Pro/4AA from Radio Shack - exactly like the original after about 20 years. Still have them. They work well when listening to stuff from the computer in the wee hours. I really like the very small PORTAPRO for my high back lounge chair. I was using the PHILIPS 895 but they hit the back of my chair when I move my head. I had the PORTAPRO drivers in my KOSS 75 clips but after a few hours they hurt my ears. I have a quarter size hole cut in both pads. When you give the PORTAPRO good amp power they really sound Although they use almost the same driver with the Porta Pros, probably titanium coating on the driver changes the sound, arguably for the better. They come with ear clips instead of a headband. They are also much cheaper; while MSRP of Porta Pros is 50$, KSC75s are sold for 20$, what a bargain! However ear clips are annoying, at least they are 4SDCK.

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