---
product_id: 3661666
title: "Koss QZ-99 Noise Reduction Stereophone, Standard Packaging,Black"
brand: "koss"
price: "HK$909"
currency: HKD
in_stock: true
reviews_count: 8
category: "Koss"
url: https://www.desertcart.hk/products/3661666-koss-qz-99-noise-reduction-stereophone-standard-packaging-black
store_origin: HK
region: Hong Kong
---

# 8-ft Coiled Cord Passive Noise Reduction On-ear Volume Control Koss QZ-99 Noise Reduction Stereophone, Standard Packaging,Black

**Brand:** koss
**Price:** HK$909
**Availability:** ✅ In Stock

## Summary

> 🔇 Tune out the noise, tune into your world — because focus is the new luxury.

## Quick Answers

- **What is this?** Koss QZ-99 Noise Reduction Stereophone, Standard Packaging,Black by koss
- **How much does it cost?** HK$909 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/3661666-koss-qz-99-noise-reduction-stereophone-standard-packaging-black)

## Best For

- koss enthusiasts

## Why This Product

- Trusted koss brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Freedom to Move:** 8-foot coiled cord offers mobility without tangles—stand up, move around, stay connected.
- • **Immerse in Silence:** Advanced passive noise isolation blocks ambient distractions so you stay laser-focused.
- • **Built for Endurance:** Durable metal frame and Pneumalite™ cushions ensure comfort and longevity for marathon sessions.
- • **Flexible Listening Modes:** Stereo/mono switch adapts to your audio needs, perfect for scanners or music.
- • **Precision Volume at Your Fingertips:** Convenient earcup volume control lets you adjust sound levels without missing a beat.

## Overview

The Koss QZ-99 Noise Reduction Stereophone delivers professional-grade passive noise isolation with a frequency response of 40-20,000 Hz. Featuring an 8-foot coiled cord, on-ear volume control, and a stereo/mono switch, it’s engineered for clear, focused listening in demanding environments like racing scanners and metal detection. Its durable metal construction and Pneumalite™ ear cushions provide comfort and long-lasting use, making it a timeless choice for professionals seeking distraction-free audio.

## Description

Product Description Product Description The QZ99 Passive Noise-Reducing Over-Ear Headphones from KOSS are designed to make the world disappear. Pneumalite(TM) ear cushions and an extra-secure headband help with passive sound isolation, allowing for listening without outside noise. A volume control is located on the ear cup for maximum ease of use.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. From the Manufacturer 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. Features Frequency Response: 40-20,000 Hz Passive Noise Reduction stereophone system isolates listener from ambient sounds Ideal for use with racing scanners and metal detectors Volume control on ear cup for easy level adjustment Stereo/Mono switch for added flexibility Single entry, 8 foot coiled cord 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. desertcart.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. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer 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.Features Frequency Response: 40-20,000 Hz Passive Noise Reduction stereophone system isolates listener from ambient sounds Ideal for use with racing scanners and metal detectors Volume control on ear cup for easy level adjustment Stereo/Mono switch for added flexibility Single entry, 8 foot coiled cord See more

Review: Solid sound, solid noise isolation, solid all around. - In 20 or so years of playing music, I’ve gone through a lot of headphones. I’ve usually been ok with them, nothing really to write home about. They make the noise go into my ears and keep the noises I don’t want in, out. I had the Vic Firth version of these and, while my melon is obnoxiously large, they still fit tight. They sounded fine, nice and flat but good quality and kept the noise out. These Koss cans? Blows the Vic Firths out of the water. The volume control is awesome, the cable length is perfect, comes with a spare 1/4” adapter, the sound is nice and flat but still vibrant and good for critical listening, the squishy bit on the bottom of the head band is awesome (it’ll be sad when that dies in a few years) and the muffs fit snug, as well as the noise reduction being that perfect split between cutting the harsh while still letting the wearer hear the important stuff. Its still a smidge right but the squish and ear cups mitigate that a lot and allow me to keep them on for a while practice without whining. I may end up getting another pair just in case these die before their time.
Review: Koss QZ-99 Noise Reduction Stereophone GREAT HEADPHONES! - Wow, just WoW! .. These are like the ear protection we used in the military.. we called them micky mouse ears.. they were hard plastic cups that encased the ears with sound silencing materials lining the inside. If you combined micky mouse ears with the little plastic insert ear plugs you became effectively deaf.. well tehse headphones are like mickey mouse ears with speakers installed. They passivly block external sounds thru extremely effective sound silencing. and the audio is not bad either. the cable is curly so it does not get caught up in my chair's wheels or drag on the floor.. yet it has the reach where i can stand up and move around the room a bit so i love the cord.. love the headphones.. the ONLY draw back is they do put some pressure on your head. and being a bit airtight you might sweat in a hot environment. bottom line is tho i have found the love of my life when it comes to headphones. I really like these headphones, they are high quality construction. They sound great too but i'm no sound expert. They are over the ear.. except they rest on the bottom of my earlobes.. update: july 2015, well the adustable volume makes the left ear drop out.. you have to spin the volume back and forth like your wearing thru the corrosion on the resistor parts so it gets a good connection. The wires are solid.. the connections are solid.. I believe this intermittant left ear connection is in the variable resistor itself.. not in a faulty wire or connection. So sadly we go from a 5 to something less due to they used a cheap part.. which cheapened what would otherwise be a first class product. I know this product is discontinued so perhaps this was why. bottom line is the left ear is dropping out and i have to mess with the volume knob to restore the left ear sounds. i might try the upgraded version of this and pray they aren't using the same part that is failing here.

## Features

- Quiet Zone QZ99 Passive Noise Reduction
- Passive noise reduction stereophone system isolates listener from ambient sounds
- Volume control on earcup for easy level adjustment
- Ideal for use with racing scanners and metal detectors
- Stereo/mono switch for added flexibility
- Single-entry, 8-foot coiled cord

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000051SD1 |
| Age Range (Description) | Adult |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #27,112 in Electronics ( See Top 100 in Electronics ) #802 in Over-Ear Headphones |
| Cable Feature | Retractable |
| Compatible Devices | Laptops, Desktops, Tablets, Cellphones, Music Production Equipment |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Control Type | Volume Control |
| Controller Type | Wired |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.1 4.1 out of 5 stars (913) |
| Date First Available | September 4, 1973 |
| Department | Patio, Lawn & Garden |
| Earpiece Shape | Rounded tip |
| Global Trade Identification Number | 00021299134122 |
| Hardware Interface | 3.5mm Audio |
| Headphones Jack | 3.5 mm Jack |
| Included Components | Cable |
| Input Device Interface | Audio jack |
| Is Discontinued By Manufacturer | Yes |
| Item Weight | 15 ounces |
| Item model number | QZ99 |
| Manufacturer | Koss |
| Material | Metal |
| Model Name | Noise-Cancelling-Feature |
| Noise Control | Sound Isolation |
| Noise Control Features | sound_isolation |
| Number of Items | 1 |
| Product Dimensions | 8.63 x 4.13 x 8.38 inches |
| Recommended Uses For Product | Music, Travel |
| Sensitivity | 102 dB |
| Special Feature | Volume Control |
| Supports Bluetooth Technology | Yes |
| UPC | 600682779975 088037836168 172304341360 851025056721 021299134122 689076196277 887492361235 001910136773 100177327907 172302808155 014444735268 339335142063 601000776720 809185286946 971471412190 021113052090 809385136706 763615963268 102930993589 055555559442 962327261666 168141622397 807032926472 851975696558 |
| Units | 1.0 Count |
| Water Resistance Level | Not Water Resistant |
| Wireless Communication Technology | Bluetooth |

## Product Details

- **Brand:** Koss
- **Color:** Black
- **Ear Placement:** On Ear
- **Form Factor:** Over Ear
- **Impedance:** 60 Ohms

## Images

![Koss QZ-99 Noise Reduction Stereophone, Standard Packaging,Black - Image 1](https://m.media-amazon.com/images/I/914W2oi686L.jpg)
![Koss QZ-99 Noise Reduction Stereophone, Standard Packaging,Black - Image 2](https://m.media-amazon.com/images/I/71iNvvjqWQL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid sound, solid noise isolation, solid all around.
*by O***S on September 17, 2020*

In 20 or so years of playing music, I’ve gone through a lot of headphones. I’ve usually been ok with them, nothing really to write home about. They make the noise go into my ears and keep the noises I don’t want in, out. I had the Vic Firth version of these and, while my melon is obnoxiously large, they still fit tight. They sounded fine, nice and flat but good quality and kept the noise out. These Koss cans? Blows the Vic Firths out of the water. The volume control is awesome, the cable length is perfect, comes with a spare 1/4” adapter, the sound is nice and flat but still vibrant and good for critical listening, the squishy bit on the bottom of the head band is awesome (it’ll be sad when that dies in a few years) and the muffs fit snug, as well as the noise reduction being that perfect split between cutting the harsh while still letting the wearer hear the important stuff. Its still a smidge right but the squish and ear cups mitigate that a lot and allow me to keep them on for a while practice without whining. I may end up getting another pair just in case these die before their time.

### ⭐⭐⭐⭐⭐ Koss QZ-99 Noise Reduction Stereophone GREAT HEADPHONES!
*by S***I on May 13, 2015*

Wow, just WoW! .. These are like the ear protection we used in the military.. we called them micky mouse ears.. they were hard plastic cups that encased the ears with sound silencing materials lining the inside. If you combined micky mouse ears with the little plastic insert ear plugs you became effectively deaf.. well tehse headphones are like mickey mouse ears with speakers installed. They passivly block external sounds thru extremely effective sound silencing. and the audio is not bad either. the cable is curly so it does not get caught up in my chair's wheels or drag on the floor.. yet it has the reach where i can stand up and move around the room a bit so i love the cord.. love the headphones.. the ONLY draw back is they do put some pressure on your head. and being a bit airtight you might sweat in a hot environment. bottom line is tho i have found the love of my life when it comes to headphones. I really like these headphones, they are high quality construction. They sound great too but i'm no sound expert. They are over the ear.. except they rest on the bottom of my earlobes.. update: july 2015, well the adustable volume makes the left ear drop out.. you have to spin the volume back and forth like your wearing thru the corrosion on the resistor parts so it gets a good connection. The wires are solid.. the connections are solid.. I believe this intermittant left ear connection is in the variable resistor itself.. not in a faulty wire or connection. So sadly we go from a 5 to something less due to they used a cheap part.. which cheapened what would otherwise be a first class product. I know this product is discontinued so perhaps this was why. bottom line is the left ear is dropping out and i have to mess with the volume knob to restore the left ear sounds. i might try the upgraded version of this and pray they aren't using the same part that is failing here.

### ⭐⭐⭐⭐ Excellent Product/Very Reasonable Price!
*by J***N on December 25, 2011*

The Koss QZ-99 headphones are excellent. They're built like a Russian dump truck. The quality sound reproduction is outstanding!! These over the ear headphonesare great at "locking out" extraneous noises. They do this not through electronic noise cancellation, but through "ear protector" technology. That is, they are like industrial ear muffs with sound. They fit snug on your ears, and block out annoying outside noise. I bought mine for business use. I'm a private investigator, and use them to listen to recorded statements etc. Often these recordings are made under far less than optimal conditions (in restaurants/vehicles etc with lots of background noise). I bought these headphones so that I could focus closely on the recordings. One mis-interpreted word in a transcription of a recorded statement can have MAJOR detrimental effects! These headphones fit the bill. I love them! I also use them for music and watching movies. They have a built-in volume switch, and can be switched from mono to stereo with a built-in line switch. I recently flew on a commercial airline flight with hese headphones, and they made the flight much more enjoyable. The headphones blocked most of the cabin noise and allowed me to watch a DVD inflight. These headphones aren't for everyone. If you're looking for a wimpy little headset that you can stuff in your jacket pocket, look elsewhere! If you're looking for a pair of heavy-duty headphones that will block out outside noise, have much better sound reproduction than you'd expect, and want excellent value for money, these are for you! I hope you enjoy yours as much as I enjoy mine! My direct email is: croninj@ix.netcom.com.

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-05*