Visit our Business Solutions website >>

Koss QZ-50

alaTest has collected and analyzed 35 reviews of Koss QZ-50. The average rating for this product is 3.4/5, compared to an average rating of 4.0/5 for other Headphones for all reviews. People are impressed by the design and bass quality. The usability and price also get good views. There are mixed comments on the reliability and comfort. The size and portability get less positive opinions.

sound, price, usability, bass quality, design

portability, size

We analyzed user and expert ratings, product age and more factors. Compared to other Headphones the Koss QZ-50 is awarded an overall alaScore™ of 70/100 = Good quality.

Review analysis

(Based on 35 reviews)

User Reviews  

Showing 35 review(s)

Expert Reviews User Reviews
Showing 1 - 27 of 35 Show Reviews: in English

Consumer review by: ( review summary for Koss QZ-50


alaTest has collected and analyzed 17 user reviews of Koss QZ-50 from The average user rating for this product is 2.6/5, compared to an average user rating of 3.9/5 for other Headphones on Opinions about the design and bass quality are overall positive. The price and usability are also appreciated. There are some mixed reviews about the comfort. Many are critical about the size and portability.

sound, usability, price, bass quality, design

portability, size

24% of the reviews on give this product a positive rating.

This summary is based on the product: Koss QZ50 Stereophone

Aug, 2015

Consumer review by: littlenycfish (

Bulky, heavy


I really should have returned these, but I am just too lazy. They feel too heavy on my head and I want to take them off after several minutes. They look great. But if you love bass like I do, forget it.

May, 2010

Consumer review by: hardrock99 (



These headphones have great sound. They have a switch for stereo or mono so the sound is premiere for both music and just voice. The volume control on the side of the headphone is very useful when you need to here someone talk to you or to control when...

Apr, 2010

Consumer review by: carolde (

Great for the price


Product came exactly as described. Work well, maybe a little larger than you might think, but definately get the job done.

Mar, 2010

Consumer review by: crjmgbs (



These headphones are heavy and bulky. You can't rest them on your neck when you need to take them off for a short period; they're too big to do this. That may not be a problem for everyone, but I work with headphones on and need to remove them often...

Mar, 2010

Consumer review by: marouli (



I bought these headphones for a recent trip to Japan. It was the best decision I ever made. Although they aren't the quality of Bose, they're great for the price. Good sound and excellent noise cancellation really helped me out. I would suggest these...

Feb, 2010

Consumer review by: estrovenny (

great value


This earphone set has sound beyond anything I had expected. The quality and price is exceptional. My wife uses the set while working out at the gym and they are so light she does not know she has them on. Would recommend to a friend!

Dec, 2009

Consumer review by: ccarlile (

Does its job


Good external noise rejection and good audio. A little heavy but comfortable.

Oct, 2009

Consumer review by: melindale (

Very Sturdy, great sound


I bought these for use with my laptop at my desk. They are a bit bulky for travel, but won't break easily. The sound is great, and I like the volume control they have as well. Price was good, and I used my coupon :-)

Mar, 2008

Consumer review by: barrem01 (

Average Sound, Dorky Look, No Noticable Noise Cancellation ”


I'm a big fan of Koss stereophones. I'm almost never without a pair of PortaPros. I own two pairs of Porta Pros because when one pair broke, I bought a second pair to hold me over untill the first pair was replaced under their lifetime warranty. I like...

Feb, 2008

Consumer review by: erfreulich (

Amazing quality for a great price!


I am a student with a shared study space that is convenient, but less than quiet most days. The noise cancelling on these headphones is phenomenal. People have to be positively screaming for me to hear them with these on. Sound quality is excellent as...

Feb, 2008

Product Specifications

New advances in materials and design have served to expand the performance of stereophones. Koss' Product Development team and engineers look for the most innovative combinations of existing and new technologies to deliver the most exciting products possible. Koss QZ 50 model features a revolutionary Active Noise Reduction (ANR) stereo phone system that reduces harmful and annoying low frequency sounds in noisy environments; a dynamic element for full sound reproduction as well as a behind-the-head stereo phone design for maximum comfort during extended wearing periods.

Audio Input

Type: None

Audio Output

Headphones Form Factor:Behind-the-neck
Headphones Type:Binaural
Product Type:Headphones
Response Bandwidth:30 - 20000Hz
Sound Output Mode:Stereo

Audio System


Dimensions & Weight



Packaged Quantity:1
Product Line:Koss QZ

Service & Support

Type:Limited lifetime warranty