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Koss QZ-99 Technology Stereo Headphone

by Koss
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ITEM# 10283179
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      **Delivery date is approximate and not guaranteed. Estimates include processing and shipping times, and are only available in US (excluding APO/FPO and PO Box addresses). Final shipping costs are available at checkout.

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      Included Warranty: Lifetime
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    Technical Specifications

    • Description
    • General Information
    • Technical Information
    • Earpiece
    • Interfaces/Ports
    • Physical Characteristics
    • Miscellaneous

    Koss QZ-99 Technology Stereo Headphone


    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.

    General Information
    Manufacturer Koss Corporation
    Manufacturer Part Number 134122
    Manufacturer Website Address http://www.koss.com
    Brand Name Koss
    Product Name QZ-99 Technology Stereo Headphone
    Product Type Headphone
    Technical Information
    Connectivity Technology Wired
    Cable Length 8 ft
    Sound Mode Stereo
    Impedance 60 Ohm
    Minimum Frequency Response 40 Hz
    Maximum Frequency Response 20 kHz
    Connector Plating Gold Plated
    Earpiece Type Binaural
    Earpiece Controls Volume
    Earpiece Sensitivity 102 dB
    Host Interface Phono
    Physical Characteristics
    Form Factor Ear-cup
    Weight (Approximate) 15 oz
    Package Contents
    • Connector coupler
    Additional Information
    • Passive Noise Reduction stereophone system isolates listener from ambient sounds
    • Ideal for use with racing scanners and metal detectors

    Quality Rating

    Learn More

    Features for Rugs

    See All Features

    Customer Reviews

    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    • Most Recent

    • just got them
      Verified Purchase

      tried these on i am hoping they are adjustable. they really do block out other sounds

      Read More
      drboog Jan 6, 2017
    • Quality is Great
      Verified Purchase

      These are extremely nice headphones. My husband was thrilled to receive them as Christmas present. Would recommend to anyone to buy these

      Read More
      Danielle T. Dec 29, 2016
    • Charles Wright
      Verified Purchase

      Outstanding head phone, probably the best sound experience I have ever had.

      Read More
      Charles W. Oct 28, 2016
    • sweet
      Verified Purchase

      They are a little heavy and stiff but the sound great and price was perfect

      Read More
      Terry A. Oct 22, 2016
    • music
      Verified Purchase

      i really like these little heavy but i like the sound

      Read More
      Barb B. Apr 7, 2016
    • Most Helpful

    • Amazing quality for a great price!
      Verified Purchase

      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 well and the volume knob on one of the earshells is really convenient.

      Read More
      erfreulich Feb 4, 2008
    • Best passive I have had
      Verified Purchase

      Hey all, I am a professional drummer who is always looking for quite ways to practice. I currently have an electronic Drum Set that I use to practice with while at home. These head phones work great with it. It cuts out the tapping sounds the sticks make on the rubber pads. I will also wear them an hour at a time and there is never any discomfort. Bass and treble come through really well and the volume adjustment on the headphones themselves come in handy when I need that extra boost of volume. The only downside is the cord, its coiled but it can stretch out. Its not really an issue, I'm just not a fan of coiled wires.

      Read More
      buckd Mar 8, 2007
    • Awsome
      Verified Purchase

      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 you are not in a loud situation like mowing. I am truley satisfied with everything about these headphones.

      Read More
      hardrock99 Apr 14, 2010
    • New Stereo Headphones
      Verified Purchase

      My husband and I just got new headphones for our stereo, and now when we listen to our cassettes and CDs, they sound so clear! This is the best thing we ever bought, and I'm so glad we got it from O.

      Read More
      lee2b Sep 18, 2007
    • Noise Cancelling is Right!
      Verified Purchase

      When I put these headphones on, I can look right at someone talking to me & not hear one word! I ordered them for work, where the noise & chatter is a distraction. THESE ARE PERFECT! The audio quality is not stellar. As suggested by the details page, where it says "Ideal for use with racing scanners and metal detectors" (not music). Don't get me wrong, the sound is fine for music, but nothing to brag about. For awesome sound AND awesome passive noise cancellation, you'll have to upgrade. I had a pair of Audiology headphones that were about the same price, and they broke after 4 months. Koss is good quality; I hope to enjoy these for a long time!

      Read More
      xemnosyst Apr 5, 2007

    Questions & Answers

    • Q:

      "tight - can they be adjusted?"

      • A:

        Yes, you can adjust the headphone up and down to help fit it on the eat better. However, you cannot make them wider.

    • Q:

      "Will the plug fit an I-Phone as well as a Nokia?"

      • A:

        The Koss QZ-99 headphones use a standard 3.5mm auxiliary input. This will work with both of your devices.

    • Q:

      "Hey I am from India how can I get this product in India please tell me"

      • A:

        Hello , we suggest you visit the International section of our website and select the destination country. Our international site will help narrow your search and only display inventory available for delivery to your selected country. For more information on international orders, please follow the below provided link. Thanks for shopping with us! https://help.overstock.com/app/answers/detail/a_id/5752

    • Q:

      "Can this item be used to plug into your desktop computer tower? Thank you"

      • A:

        Hello Vee63, yes, this can be plugged into your desktop computer tower. Thank you for shopping with us!

    • Q:

      "Why did you choose this product?"

      • A:

        i liked the price...

      • A:

        good reviews for noise cancelling

      • A:

        reputation of koss products, is a very reliable one.

      • A:


      • A:

        great reviews

      • A:

        Because it's Koss :)

      • A:

        good brand

      • A:

        The other one was out of stock & order canceled by Ovderstock.

      • A:

        Price and overview

      Read more Read less

    Shopping Tips & Inspiration

    Shipping & Returns

    Contact Information

    Usually leaves our warehouse in 1-2 business days. *

    Shipping Information:

    Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
    Standard shipping details
    Expedited shipping details

    Standard Return Policy for Electronics:

    The items must arrive at our warehouse within 30 days of purchase. You must return items in their original condition to qualify for a full refund. We will issue a partial refund of up to 70 percent if returned items have been opened, used, or returned late. More Details

    For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

    ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.