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

$114.99

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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

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.

These things sound great!!!

Even though these are vintage design, they are the best headphones you can get.

Koss Pro4AA for bedroom guitar

I got these Koss Pro4AA for playing electric guitar through an audio interface. These stereophones let me play loud in a quiet apartment. The sound isolation is really great and makes the guitar sound huge in the headphones. Listening through an audio interface definitely takes the Pro4AA to the next level. Love these headphones!!

Best headphone period

Most of the bad reviews you hear from these are people using them on thier phones or computers without a headphone amp,an absolute must.These have to have a decent amp to get the best sound.
I recently bought a pair of HI Fi Man Sundaras,the best selling headphone out there.
The Koss Pro 4 AAs are superior in bass response and detail retrieval.
Sundaras have a wider soundstage,but are horrible with thin bass.I have both phones pictured.
I also compared the Pro 4AAs to Seinhiesser 599s,again,Koss comes out ahead.
It's interesting to note that Roger Waters used the Pro 4 AAs when he recorded Dark Side Of The Moon.
Another hidden gem by Koss is the pro4 xx,and the Pro 4 AAA I wish they would produce again.