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Koss KHP21V

alaTest has collected and analyzed 65 reviews of Koss KHP21V. The average rating for this product is 2.9/5, compared to an average rating of 4.0/5 for other Headphones for all reviews. People are impressed by the reliability and usability. The comfort and price also get good feedback, whereas many are negative about the durability.

sound, price, comfort, usability, reliability


We analyzed user and expert ratings, product age and more factors. Compared to other Headphones the Koss KHP21V is awarded an overall alaScore™ of 72/100 = Good quality.

Review analysis

(Based on 65 reviews)

User Reviews  

Showing 57 review(s)

Expert Reviews User Reviews


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Showing 1 - 57 of 57 Show Reviews: in English | in other languages (5)

Consumer review by: ( review summary for Koss KHP21V


alaTest has collected and analyzed 55 user reviews of Koss KHP21V from The average user rating for this product is 2.8/5, compared to an average user rating of 3.9/5 for other Headphones on Reviewers really like the reliability and usability. The comfort and price are also appreciated.

sound, price, comfort, usability, reliability

55% of the reviews on give this product a positive rating.

This summary is based on the products: Koss Hi Fi Stereophone with Volume Maximum Durability (158445)Koss Hi Fi Stereophone with Volume Maximum Durability (158445) (Discontinued by Manufacturer)

Feb, 2016

Consumer review by: Entropy (

You get what you pay for


Light and Cheap

Light and Cheap. It fits tight to the head and has the feel of cheap, cheap, cheap. The sound is muted. Then again, it is less than $20. I guess you get what you pay for. I ended up buying something twice the price that was worth it

Dec, 2011

Consumer review by: guzmos (

The Koss name can be trusted for high-quality products


I use my laptop everyday and sometimes I like to listen to music while I am working, however, the speakers on my laptop sound horrible, even though the laptop is equipped with High-Definition sound. In order to remedy this situation I purchased the...

Comfortable, good bass response, inexpensive

Can't find any

Sep, 2008

Product Specifications

With its high quality sound performance and enhanced bass, the KHP21v is ideal for listeners seeking headphones with a big sound that wears comfortably and travels light. The KHP21v is equipped with dynamic elements for an extended frequency response from 20-18,000 Hz. Anisotropic ferrite magnets mean the KHP21v can really turn up the volume, even with low-voltage portable devices. Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. To improve bass performance, block outside noise, and minimize sound leakage, closed leatherette ear cushions seal lightly around the ears. An inline volume control allows you to conveniently adjust the sound levels while listening. The KHP21v features contemporary styling and a simple design. At just over six ounces, these headphone wear comfortably even after hours of listening. The headband is adjustable to ensure a comfortable fit for any head size or shape. The KHP21v includes a single-entry four-foot cord, perfect for use with portables. A 3.5mm (1/8") plug, L-shaped to minimize cord stress, and a 6.3 mm (1/4") adapter are included.

Audio Output

Connectivity Technology:Wired
Headphones Form Factor:Ear-cup
Headphones Type:Binaural
Product Type:Headphones
Response Bandwidth:20 - 18000Hz/40 - 20000Hz
Sound Output Mode:Stereo

Audio System


Dimensions & Weight



Packaged Quantity:1
Product Line:Koss

Service & Support

Type:Limited lifetime warranty