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Crutchfield

Koss PRO4AA

Around-the-ear headphones

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  • Koss PRO4AA

    Front

  • Koss PRO4AA

    With coiled cable

Item #: 245PRO4AA
 

Review Summary

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Our take on the Koss PRO4AA

by David Brown

Built to stand the test of time

Koss has been pleasing ears since 1970 with their PRO4AA headphones. The vintage looks of the latest PRO4AA nicely compliment their sweet sound. Designed for use in recording studios, these unique closed-back headphones provide excellent noise isolation, so external distractions don't disrupt your listening. They present your music with clarity and accuracy, so you can experience it as the artist intended.

The PRO4AA combines durability and comfort, with a rugged exterior wrapped around the softly padded headband and earcups. The 8-foot coiled cable gives you room to move about as you listen, perfect for use with your home system.  There's even a boom microphone mount on the earcup, for use in broadcast production.

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Highlights:

  • closed-back design keeps out external noise for listening in any environment
  • 8-foot coiled cable with 1/4-inch plug
  • boom microphone mount on left earcup
  • frequency response: 10-25,000 Hz
  • sensitivity: 95 dB
  • impedance: 250 ohms
  • weight: 22.6 oz.
  • warranty: lifetime
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Fit Style
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Around-the-Ear
Earcup Type
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Closed
Noise-canceling
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No
Bluetooth
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No
Frequency Response
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10-25k Hz
Sensitivity
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95 dB
Impedance
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250 Ohms
Weight
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22.6 ounces
Cord Length
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96"
Airline Adapter Included
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No
iPod Control
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No
Volume Control
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No
Built-in Microphone
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No
Parts Warranty
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Lifetime
Labor Warranty
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Lifetime
Product Research
What's in the box?

Download owner's manual

  • Over-ear headphones with attached 8' coiled cord (1/4" plug)
  • Limited Lifetime Warranty sheet

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Overview: The Koss Pro/4AA noise-isolating, full-size headphones feature oversized elements and an exceptionally wide frequency response (10Hz-25k Hz). The steel and integrated padded headband lets you use the headphones for extended periods. The generous ear pads and closed design shut out external noise so all you hear is the music. The left earcup has a threaded mount for an optional boom microphone.

History: The Pro/4AA headphones were first introduced in 1970. A staple of music and radio professionals, the Pro/4AA set the standard for high fidelity performance until it was retired in the late 1980s. By popular demand, the model was reintroduced, and remains a favorite with sound professionals and audiophiles. It continues to be manufactured in the USA.

Cord: The heavy duty 8' coiled cord extends from the left earcup, and terminates into a full-sized 1/4" plug. No adapters are included with the Pro/4AA.

Warranty: The Pro/4AA is covered by the Koss Stereophones Limited Lifetime Warranty.

Specifications:

  • Frequency Response: 10Hz-25kHz
  • Sensitivity (dB/1mW): 95dB
  • Nominal Impedance: 250 ohms
 
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Koss PRO4AA Reviews

Average Customer Review:

6 people say:

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5 out of 5

KOSS Pro4aa headphones- a professional's standard

Written By Mark D, Orlando, FL on Wednesday, May 22, 2013
Crutchfield Customer Review (What's this?)
 
For a professional radio announcer, the KOSS Pro4aa headphones are the industry standard. When I began my career in 1984, I noticed that every announcer had a pair of these headphones. That is because of how they work. They have excellent frequency response. They have great clarity even at high volume. They are durable enough to handle all of the on and off action they get during an air shift. They are comfortable enough to be worn for extended air shifts, 6 hours on air, plus 2 more hours doing commercial production. And the keep the noise out and the volume in.

There are two things you want to happen when you turn on that microphone: out to stay out, and in to stay in. When you talk, you want to hear what is being broadcast or recorded, not your voice in the room. The KOSS Pro4aa headphones practically eliminate you hearing all the outside noise, including your own voice. They also keep what you are hearing in, by totally enclosing your ears, to prevent feedback. I have tried other headphones that I had at home, and had some accidental feedback. That can be painful to you, and to your listeners.

Bonus: there is a knob on the side that I have used in the past to mount a boom mic for live applications. (Shure SM10A) I use expensive studio mics now, but for sports broadcasters or announcers at live events, it is a nice feature.

Bottom line, to get clear content in the studio at the maximum level without noise or feedback, go with the Koss Pro4aa professional headphones.
Pros:
can handle high level of audio eliminate external sound/noise closed ear design prevents feedback comfortable adjustable headband durable replaceable ear cushions long cable provides mobility for announcer to move freely
Cons:
no color choice
2 out of 2 people found this helpful
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"Coolness Factor"
Build Quality
Comfort
Noise Reduction
Sound Quality
 
5 out of 5

Koss Pro4AA

Written By jc, phx on Wednesday, May 01, 2013
Crutchfield Customer Review (What's this?)
 
I had a pair years ago and was glad to see them being made again. They sound as good as I remember . Very few things turn out to be as good as I remember.
Pros:
clear , accurate sound , no enhancements
Cons:
none for my intended purpose
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"Coolness Factor"
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Comfort
Noise Reduction
Sound Quality
 
5 out of 5

Koss PRO4AA

Written By Anonymous, washington on Monday, April 29, 2013
 
As good as 1973
Pros:
A buy for the money
Cons:
0
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"Coolness Factor"
Build Quality
Comfort
Noise Reduction
Sound Quality
 
5 out of 5

Koss PRO4AA

Written By Cmitch, arkansas on Monday, April 15, 2013
Crutchfield Customer Review (What's this?)
 
Excellent headphones, probably worth more than many overpriced units that alter the sound.
Pros:
Quality construction and flat sound. ( no enhancement/altered sound)
Cons:
NONE
1 out of 1 people found this helpful
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"Coolness Factor"
Build Quality
Comfort
Noise Reduction
Sound Quality
 
5 out of 5

Koss PRO4AA

Written By Tom, Tucson, Arizona on Sunday, March 31, 2013
Crutchfield Customer Review (What's this?)
 
The headphones are really great sounding, a very wide spectrum of sound. When I used a phono jack extension I encountered lots of static and poor sound quality. I solved this by using s 1/6" rubber "O" ring on the base of the headphone phonojack, connected it to the extension cord and it works perfectly, great sound.
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"Coolness Factor"
Build Quality
Comfort
Noise Reduction
Sound Quality
 
5 out of 5

Wow, and not broke in yet!

Written By zig-zag, Pahoa, HI on Wednesday, January 30, 2013
Crutchfield Customer Review (What's this?)
 
Wow, these headphones sound incredible and I just received them. I hear it takes about 30 hours to break them in, and then they really sound good. Very articulate from the deepest bass all the way up to the highest treble. Very neutral, no coloration at all, no overtones, just pure clean sound. They do take a bit of a signal at 250 ohms but thats why they can handle what you give em and sound incredible without being instantly loud. If you are buying them, you must know they are quite heavy, not your walk around headphones. But they are built like a tank and don't feel cheap, although I have heard that the older version was even more solid. You hear every little detail in the music and mix. In my opinion they are well worth price. Awsome service from Crutchfield, as ususal.
Pros:
very articulate, flat no coloration, awsome frequency response, extremely solid
Cons:
a bit heavy for very long wearing periods
4 out of 4 people found this helpful
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"Coolness Factor"
Build Quality
Comfort
Noise Reduction
Sound Quality
 

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