Koss Porta Pro Stereo Headphones with pouch.

The first thing you'll notice about the PortaPros is that they look like something from the 1980s. That's because they are -- Koss released these exact headphones in 1984 and they became so popular that Koss hasn't changed a thing for 23 years.

These headphones retain the same design both internally and externally. The earcups are secured to your head by a thin steel headband that adjusts with two sliders that tighten and loosen the tension. Once you have them in place, the PortaPros are actually very comfortable -- they're featherweight and additional cushions on top of the ear pads prevent the headset from slipping.

The Porta Pro features dynamic elements that deliver exceptionally rich, deep bass and a remarkably wide frequency response from 15-25,000 Hz to capture every nuance in your favorite movie or musical performance

Constructed from mylar, the elements are extremely rigid, minimizing mechanical distortion and ensuring exceedingly accurate sound reproduction

Neodymium iron boron rare earth magnet structures enable the Porta Pro to deliver greater volume so you can hear every note, even when competing against the sounds of a commuter train with a low-voltage MP3 or disc player

Oxygen free copper voice coils improve signal transmission and conduction for cleaner, clearer sound

Foam earcushions provide an open, hear-through sound that lets you keep in touch with your surroundings perfect to wear while running, at work, or while traveling 

Frequency Response 15-25,ooo Hz
Impedence 60 ohms
101 dB SPL/1mW
Distortion <0.2%
Cord - Straight, Dual Entry, 4ft.

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