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Koss QZ-99 Noise Reduction Stereophone

4.0 out of 5 stars 222 customer reviews
| 24 answered questions

Price: $40.00 & FREE Shipping on orders over $49. Details
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Standard Packaging
  • Passive Noise Reduction Headphones
  • Neodymium Magnet Structures Deliver Outstanding Clarity & Definition
  • Closed Pneumalite(Tm) Ear Cushions & Extra Secure Headband Seal Ears, Eliminate All Ambient Noise
  • Volume Control On Ear Cup Allows Easy Level Adjustment
  • Stereo/Mono Switch Extends User Flexibility
  • Passive noise reduction stereophone system isolates listener from ambient sounds
  • Volume control on earcup for easy level adjustment
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71 new from $37.99
$40.00 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

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Technical Details

Product Packaging: Standard Packaging
  • volume-control

Compare to Similar Items


This item: Koss QZ-99 Noise Reduction Stereophone
Customer Rating 4 out of 5 stars (222) 4 out of 5 stars (932) 3 out of 5 stars (38) 4 out of 5 stars (166)
Price $40.00 $13.14 $22.89 $32.42
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com
Color Better Black Black Black
Fit Over-Ear Over-Ear Over-Ear Over-Ear
Headphones Form Factor closed-back closed-back closed-back closed-back
Dimensions 8.38 inches x 8.63 inches x 4.13 inches 11.94 inches x 4.75 inches x 8.81 inches 7 inches x 7.5 inches x 4 inches 3.75 inches x 10 inches x 8 inches
Item Weight 1.64 pounds 1 pounds Information not provided 0.6 pounds
Special Features volume-control lightweight volume-control lightweight
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Product Description

Product Packaging: Standard Packaging

Product Description

Koss Qz99 Passive Noise-Cancelling Full-Size Headphones

Amazon.com

The Koss QZ99 headset is a passive noise-reduction stereophone system that isolates the listener from ambient sounds, allowing clear and focused listening of the intended aural signal. Ideal for use with racing scanners and metal detectors, it includes a volume control on the earcup for easy level adjustment, a stereo/mono switch for added flexibility, and a single entry, 8 foot coiled cord.

Product Information

Product Packaging:Standard Packaging
Product Dimensions 8.6 x 4.1 x 8.4 inches
Item Weight 1.6 pounds
Shipping Weight 1.6 pounds (View shipping rates and policies)
Department unisex-adult
Manufacturer Koss
ASIN B000051SD1
Item model number QZ99
Customer Reviews
4.0 out of 5 stars 222 customer reviews

4.0 out of 5 stars
Best Sellers Rank #432 in Electronics > Headphones > Over-Ear Headphones
#6,335 in Electronics > Home Audio & Theater
#7,132 in Electronics > Portable Audio & Video > MP3 & MP4 Players & Accessories > MP3 & MP4 Player Accessories
Discontinued by manufacturer Yes
Date first available at Amazon.com September 4, 1973

Technical Specification

Warranty [pdf ]

Warranty & Support

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

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Customer Reviews

Top Customer Reviews

Package Type: Standard Packaging
These headphones are basically a pair of noise blocking earmuffs with speakers inside.

These are NOT light, NOT small and not the most comfortable.

BUT they are the absolute best noise blocking headphones I have ever used. They are Noise blockers first, headphones second.

I use mine to listen to music while I mow my lawn, I also wear them during target practice. I would not use them for travelling or in the office but thats ok.

Every one who mows their own lawn, works in a machine shop, or works around very loud areas should own a pair of these. Protect your hearing and listen to music at the same time.
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Package Type: Standard Packaging
The Koss QZ-99 is a very nice product, for certain things. I would never recommend this type of product, without knowing the context. I use it for listening to books on tape, on the street or in a gym, on an old portable tape player. Since I am just listening to narration, I care much more about outside sound being blocked out than I care about sound quality. If you use Bose headphones in this context, you are going to get much better sound, but that is a drawback: you will hear the crackles and rattles and pops on the your 8 year old Walkman and the 5 year old library book-on-tape. Noise reducing headphones can be too good. If I were listening to classical music on a CD player, in an airplane, a higher quality, and/or active noise reducing product would be better. But for my situation the Koss is very nice. I did not realize, until recently, that I could swivel the ear pads as well a lengthen and shorten the band between the pads. It works very well.
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Package Type: Standard Packaging
I'm a drummer and have been involved with music - in some form or fashion - for more than 40 years. One of my current gigs involves playing a drumset enclosed within a sound booth. Isolation headphones are an absolute necessity in this setting. My old headphones were well worn and I did do a good bit of research for a replacement pair. Most "pro" studio headphones are $150+ and I didn't want to drop that much for them. When I saw the Koss QZ-99's, read the reviews (most of which were good), and saw the price (forty bucks even - shipped - on Ebay)- I decided to give them a try. Well, they are rather suitable for my purposes - they do a fair job cutting the background noise - are decently constructed with metal supports rather than the soon-broken plastic used on most of today's headphones - and will probably hold up well. They fit snuggly - perhaps just a bit too snuggly - but, again, that is desirable for my purposes. I don't want them flying off while I'm playing. So - they do fill a need for me - and relatively inexpensively compared to most other options.

Now for the bad news - the sound quality from these headphones is mediocre at best and they can be uncomfortable to wear. Bass response is very poor - and if you try to accentuate the bass, you'll get an annoying rattle in both earpieces. Since the sound elements can't keep up, I really don't believe they would hold up long with boosted-bass settings. The treble also seems just a bit clipped... I'd characterize the sound as slightly "muddy" in general. These are by no means "audiophile" quality headphones - I've had inexpensive headphones from discount stores that could easily match - and, in some cases, exceed - the sound quality of the Koss QZ-99's.
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Package Type: Standard Packaging
I used them daily for two weeks before one ear started shorting out, that ear completely went blank after four weeks. They sure did work great those first 10 days or so.
They look tough but I doubt they could handle a weekend at NASCAR, for which I bought them for. I was using them for music and radio when they shorted out on me.
However, the warranty on them says "Lifetime, No Questions Asked!" ...So I will check that out, send them in, and see what happens. If Koss can get them back to me in a quick turnaround, I'll knock my rating back up to a 3.
BW
I sent them in to the company and got an extremely quick turn-around, back and working good. Next test - NASCAR.
B.
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Package Type: Standard Packaging Verified Purchase
Overall I enjoy these headphones. I love the way the look and feel, the weight of them and the comfort factor. I have only a few complaints. 1: they are not as sound proof as I was hoping they would be. Random noises still manage to creep in and disturb the your listening. 2: Although they don't hurt at all to wear for long periods of time, if by chance, someone knocks on the ear piece you're in for a world of hurt my friend. 3: I bought a [less expensive] pair of headphones for [a few] dollars and noticed the bass and treble are slightly better than in the KOSS pair. At times I wondered if too much bass would blow them out or if they were really designed for music at all.

I'm not saying KOSS isn't a great headphone maker, but if your looking for something soundproof avoid these headphones. If your looking to block out ambient noise and the majority of sounds then these are definitely yours all the way. Very comfortable and well made, KOSS is an amazing company I was looking for total soundproof protection though. In the end I kept them and still use them for my music. I very much enjoyed this product and highly recommend it to anyone out there.
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