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Koss Pro-4AA Studio Quality Headphones

4.3 out of 5 stars 233 customer reviews
| 18 answered questions

Price: $79.99 & FREE Shipping. Details
Only 3 left in stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Standard Packaging
  • 10 - 25,000 Hz frequency response
  • Closed ear cushions for maximum bass and isolation
  • Includes microphone mount hardware
  • 10 foot cord
  • .25-inch plug
11 new from $79.95 4 used from $63.99
$79.99 & FREE Shipping. Details Only 3 left in stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Koss Pro-4AA Studio Quality Headphones
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  • iMBAPrice® Premium High Quality Adapter STEREO GOLD Plug 3.5mm M to 1/4" F Adapter Metal - 3.5mm Stereo Plug to 6.35mm (1/4 Inch) Stereo Jack Adaptor - Gold Plated - Lifetime Warranty
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  • Hosa MHE-100.5 1/4 inch TRS to Right-Angle 3.5 mm TRS Headphone Adaptor Cable, 6 inch
Total price: $89.28
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Technical Details

Product Packaging: Standard Packaging
  • Dj-Style

Product Description

Product Packaging: Standard Packaging

Product Description

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. 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.


The Koss Pro-4AA stereo headphones were built with studio and broadcast use in mind. Closed-ear cushions provide excellent isolation and bass, while high and low sounds come in clear due to its 10 to 25,000 Hz frequency response.

The Pro-4AA includes microphone mount hardware, 0.25-inch plug, and a coiled, single-entry 10-foot cord.

Product Information

Product Packaging:Standard Packaging
Product Dimensions 9.4 x 9.4 x 4.1 inches
Item Weight 1.5 pounds
Shipping Weight 1.5 pounds (View shipping rates and policies)
Department new
Manufacturer Koss
ASIN B00004Z7G9
Item model number PRO/4AA
Customer Reviews
4.3 out of 5 stars 233 customer reviews

4.3 out of 5 stars
Best Sellers Rank #52 in Musical Instruments > Recording Equipment > Headphone & In-Ear Audio Monitors > Headphones
#1,138 in Electronics > Accessories & Supplies > Audio & Video Accessories > Headphone Accessories
Date first available at Amazon.com May 14, 2003

Technical Specification

Warranty [pdf ]

Warranty & Support

For warranty information about this product, please click here [PDF ]


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By Daniel L Edelen VINE VOICE on December 2, 2002
Package Type: Standard Packaging
I think the Koss Pro-4AA headphones were the phones of choice for Noah on his ark - they've been around a LONG time. And contrary to some longstanding products that stick around in spite of newer, more technically advanced competitors simply because a bunch of eccentrics swear by them, these phones are a fabulous choice for anyone at any time.
And now the pros and cons...
1) Heavy, heavy, heavy. Watch your neck.
2) If you have a large head, these phones can give you headaches as the headband design puts a lot of pressure on your temples and ears.
3) The coiled cord has a tendency to increasingly pull on one side of the phones as you get closer to its length limit. That this starts to happen around the halfway point is troubling.
4) Not a stylish set of phones. Almost retro in appearance. The ill green color could have been changed long ago.
5) The earpiece's circumaural seals are filled with air and will deflate if punctured. This is the Achilles heel of the phones.
6) The cord cannot be easily replaced. If you get a short, you're done for.
1) Superior, extended frequency range. Clean and flat. Still the best sounding phones I have heard in their price range. Sounds as good as phones that go for twice the price.
2) Circumaural, closed design holds in the thunderous bass and stifles the outside world.
3) Still the choice of many professionals. It's amazing how many DJs continue to use this model.
4) The price is outstanding for the quality of sound delivered.
5) Built like a tank. My first pair lasted ten years of constant use. (They never did break down, I replaced them for another reason.)
For a home system, this is a fine set of cans. If you want something portable, look elsewhere. Consider buying a cord extension, too, if you plan to sit somewhere else besides right near your stereo. And let people know that with them on, you'll be in your own musical world for a while. Sit back and enjoy!
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Package Type: Standard Packaging
These are great headphones. The sound quality is excellent and very clear; they handle treble and bass without any fuss, and have the largest frequency response on a headphone under $100 I've seen. I've heard many good things about Koss headphones, and decided to get these after reading the positive reviews on the Internet. When I got them, I realized that I underestimated how heavy these headphones are. I've read all the warnings, but never imagined headphones could be so heavy - but they are! Imagine having a pair of speakers hanging from your head - you get speaker quality sound, but you also get speaker weight. These are pretty hard to drive - my Pioneer receiver did fine, but my computer's Sound Blaster Platinum had trouble pushing these headphones to the same level.
I finally returned them after a month of use, not because of poor sound (these headphones really rock when it comes to sound, even at very loud levels, I didn't hear distortion till 98db), but out of sheer discomfort - I couldn't listen to them for more than half an hour at a time, and my head and ears got very sweaty because of the cushions. I needed headphones that sounded good and that I could wear for prolonged periods of time. Koss Pro 4AA offered great sound at a great price, but I couldn't wear them while writing a paper or reading a book. Recommended for people who have strong necks and want to hear everything clearly and without distortion. Perfect for isolation from outside noise and studio monitoring when hearing every exact detail of the recording is essential.
Excellent detailed sound - perfect treble, almost perfect bass. Very good for critical listening - you'll hear stuff you've never heard before. Isolation from outside noise. Retro look (if you're into that).
Heavy! VERY heavy!
Similar Products Used:
Sony MDR V300, V600, V700DJ, Sennheiser 495 & 497, cheap Jensens & Aiwas
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Package Type: Standard Packaging
The KOSS Pro-4AA's were not made for iPod/MP3 headphone users. TO begin with, they reveal the low fidelity of MP3 files (compared with LP's or CD's). Also, they require a 1/4"-to-3.5mm (or other) adapter in order to plug into most recent audio playback and computer equipment.

These Headphones have been around a long time. Check out the old photos of the "Watergate" hearings from 1973/1974, and notice that the Senators & attorneys were all listening to the Nixon tapes through KOSS Pro 4AA headphones. Their longevity is mainly due to their extermely high fidelity audio reproduction. Unfortunately, their age has made them somewhat inconvenient for most listeners, since they are very heavy and a bit cumbersome.


1) Weight (about 3 or 4 times as heavy as most contemporary studio-reference headphones)

2) Tight headband - as noted, the fit is fatiguing if your 'hat size' is greater than 7.

3) The coiled cord is extremely difficult to replace (it's actually less expensive to replace the entire set of headphones of you can get a good discount).


1) AUDIO FIDELITY. Unless you want to spend at least $300 for a set of headphones, the sound quality and fidelity of the Pro-4AA's is almost impossible to beat.

2) VALUE. As noted above, for the price you pay, these are vastly superior to any other headphones that are comparably priced.

3) DURABLE. My first pair lasted 30 years. They were dropped and knocked around, and finally gave out when (It think) a voltage spike surged in the left earphone, fusing a coil.

4) ISOLATION. THe paddded earphones block out external sound very well.

The sound fidelity is preserved over a wide volume range.
Read more ›
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