Name: QZ99
Brand: Koss
SKU: 14504
Rating: 4.5 (4 reviews)

3.6

based on all reviews

passive isolation is decent
Comfort and effectiveness are the most important elements for my application

noise isolation is weak and doesn't block enough ambient noise
No cherry-picked units sent by brands
Unbalanced and poor audio reproduction

Impedance: 60 Ω
Frequency range: 40, 20000 Hz
Acoustic design: Closed
Sound output: Stereo
Style: On-Ear
Connectivity technology: Wired

Koss QZ99 - Pros & Cons

passive isolation is decent
Comfort and effectiveness are the most important elements for my application

noise isolation is weak and doesn't block enough ambient noise
No cherry-picked units sent by brands
Unbalanced and poor audio reproduction
only has a volume slider
fit in a pocket and are too cumbersome to carry around on your person
not easy to find in the stores by the way

Koss QZ99 - Technical Overview

	Poor	Average	Good	Excellent
Impedance	60 Ω Best: Stax SR-L500 Impedance: 145000 Ω
Weight	425 g Best: Cyber Acoustics ACM-7002 Weight: 0.11 g

Koss - Video Reviews (5)

Koss QZ99 - Full Specifications

Sound output	Stereo
Style	On-Ear
Connectivity technology	Wired
Headset (integrated/enclosed microphone)	no
Magnet material	Neodymium

Weight	14.99 oz

Inputs supported	3.5mm
Cable length	2.42
Type of connector	3.5mm

Battery operated	no

Colour of product	Black
Acoustic design	Closed
Attachment type	Headband
Category	Audiophile
Noise isolating	yes

Impedance	60.0 Ω
Frequency range	40 - 20000
Driver technology	Dynamic
Total harmonic distortion (THD)	0.3 %

Buttons	Volume

Koss QZ99 - Q&A

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Koss QZ99 Koss - Editorial Reviews (2)

2.7

Based on 2 reviews

RTINGS.com

Published: 04.03.2016

Koss QZPro Review

2.7

The Koss QZPro are flawed headphones that fail at delivering decent audio reproduction or adequate noise isolation. They aren't comfortable, there are no satisfa...