Koss Pro/4AA Over Ear Headphones next to a record player

Koss Pro/4AA Over Ear Headphones close up

The Koss Pro/4AA were the first dynamic headphones to deliver true high-fidelity sound and excellent noise isolation

Koss Pro/4AA Over Ear Headphones with exceptional durability

Koss Pro/4AA Over Ear Headphones on the arm of a chair

PRO4AAOver Ear Headphones

Koss Pro4AA headphones set the standard for full size professional headphones. They were introduced in 1970 as the first dynamic headphones to deliver true full frequency and high fidelity performance with impressive noise isolating capabilities.

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Koss Stereophones

$160.00

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Retired in the late ’80s, Koss swiftly returned the Pro4AA headphones to its product lineup due to overwhelming popular demand. They have since remained a staple of studio headphones in the radio and recording industries. Koss Pro4AAs meet the stringent demands of broadcast and recording professionals who require reliable equipment and superior performance. The full size professional headphones keep unwanted sounds out while letting every note in. Whether you’re a sound professional or an audiophile, Pro4AAs deliver superior isolation, accurate reproduction and sound intensity, and the excitement of a live performance with every recording. Connecting with your music has never sounded so good.

Specifications

10-25,000 Hz
250 ohms
95dB SPL/1mW
<0.1%
Coiled, Single Entry, 8ft
Limited Lifetime Warranty

Exceeded expectations and great customer

Exceeded expectations and great customer service

love them

Still Going Strong at Age 50+

I bought my Koss Pro 4A (not 4AA) headphones in 1970, shortly after I bought my first high quality stereo components. Now I still use them in the studio when I do my weekly radio show. They are infinitely better than the shared headphones provided by the station. The only repair needed in 55 years of service was replacement of the ear pads. That's why I now have Pro 4AA headphones for use at home as well as a set (don't know the number) with integrated mic for use with my computer.

Full Circle

I bought my first pair of Pro/4AAs when I was in boarding school in England in 1972. These disappeared years ago. I have another pair delivered today and I’ve come full circle. In between these two there were electrostatics, noise cancelling and in ear monitors but nothing comes close to the depth, richness and tight bass of the Pro/4AAs. Glad they’re back.