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Over-ear wired headphones with closed cushions and headband

Koss

Koss QZ9922 over-ear headphone

SKU CH-9E1X-88BAT MPN QZ9922

Wired over-ear headphones with passive noise reduction, neodymium drivers, volume control and a stereo/mono switch

  • TypeOver the Ear
  • Frequency Response40Hz-20KHz
  • Input Impedance60 ohms
  • Sensitivity102dB S.P.L. at 1KHz
  • Weight0.24
  • FeaturesConnectivity Technology: Wired Wireless Technology: Not Appl
  • Passive noise reduction blocks ambient sound with closed Pneumalite cushions
  • Neodymium magnets deliver clear, defined audio across 40 Hz – 20 kHz
  • 60 ohm impedance and 102 dB sensitivity suit portable and home gear
  • 96 inch cable and ear-cup volume control give flexible wired use
  • Lightweight 0.24 build with secure over-the-head band stays comfortable for long sessions

Passive noise-reduction over-ear headphones

The Koss QZ9922 is a wired, over-the-ear stereo headphone built for passive noise reduction. Neodymium magnet structures drive a 40Hz-20KHz frequency response at 60 ohms impedance and 102dB sensitivity. Closed Pneumalite ear cushions and a secure headband form a tight seal that blocks ambient sound. A 96-inch cable with in-line volume control and a stereo/mono switch complete the package.

Listeners who need isolation in loud environments

The sealed, over-the-head design suits racing scanner operators, metal-detector users and audiophiles who want external noise removed without batteries. Buyers who want wireless freedom or active noise cancellation should look elsewhere. The fixed cable and lack of Bluetooth make it unsuitable for portable, cable-free use. Open-back or semi-open models will not provide the same level of attenuation.

60-ohm input impedance

At 60 ohms the QZ9922 draws modest current and works directly with most portable players, scanners and desktop sources without a dedicated amplifier. Higher-impedance headphones would need more voltage to reach the same volume. Lower-impedance models may play louder from weak outputs but can suffer from damping-factor issues. Match the source output impedance to this figure for best control.

Highlights

  • Passive noise reduction blocks ambient sound with closed Pneumalite cushions
  • Neodymium magnets deliver clear, defined audio across 40 Hz – 20 kHz
  • 60 ohm impedance and 102 dB sensitivity suit portable and home gear
  • 96 inch cable and ear-cup volume control give flexible wired use
  • Lightweight 0.24 build with secure over-the-head band stays comfortable for long sessions

Specifications

BrandKOSS
ModelQZ9922
TypeOver the Ear
Frequency Response40Hz-20KHz
Input Impedance60 ohms
Sensitivity102dB S.P.L. at 1KHz
Weight0.24
FeaturesConnectivity Technology: Wired
Wireless Technology: Not Applicable
Operating Distance: 96"
Sound Mode: Stereo
Earpiece Design: Over-the-head
Earpiece Type: Binaural
Shipping weight0.91 kg
Package size533 × 432 × 127 mm

Questions about this item

How do I connect the QZ9922 to my scanner and set the stereo/mono switch correctly?

Plug the wired connector into the scanner, then slide the ear-cup switch to Mono for single-channel radio audio or Stereo for music sources.

What parts of the QZ9922 will wear out and need replacement over time?

The closed Pneumalite ear cushions and the headband padding are the items that compress with daily use and can be swapped for fresh pads.

At what volume level does the 60 ohm driver start to distort during long listening sessions?

The 102 dB sensitivity means loud peaks arrive with modest power, but sustained high-volume use will hit the driver’s mechanical limits before the amplifier does.

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