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Small wired earbuds with soft foam tips and extra cushions

Koss

Koss PLUG Earbuds with 4 Extra Cushions

SKU CH-KBHX-QYP00

In-ear earbuds with expandable foam cushions for noise isolation and a 10-20 000 Hz frequency response, supplied with four extra cushions

  • Accurate sound reproduction with 10-20 000 Hz frequency response
  • Deep bass clarity via dynamic element and tubular port design
  • Custom fit with hydrophilic urethane cushions that expand in the ear canal
  • Superior isolation blocking ambient noise for focused listening
  • Four extra cushions included for extended comfort and hygiene

Portable Isolation Earbuds

The Koss PLUG earbuds use a tubular port structure that sits outside the ear while a soft foam cushion seals the canal. This design provides passive noise isolation and a frequency response of 10 to 20 000 Hz. Four extra hydrophilic urethane cushions are included so the fit stays consistent over time.

Commuters and Focus Listeners

These suit people who want to block ambient sound during travel or work without active electronics. They are not for buyers who need a built-in microphone for calls, wireless freedom, or an inline volume control. The package supplies only the earbuds and additional cushions.

Wired 10 to 20 000 Hz Response

The published frequency range of 10 to 20 000 Hz is the single figure that shows whether the tonal balance matches your preference. If your source cannot drive high-sensitivity earbuds cleanly, the bass may sound different from the specified performance.

Highlights

  • Accurate sound reproduction with 10-20 000 Hz frequency response
  • Deep bass clarity via dynamic element and tubular port design
  • Custom fit with hydrophilic urethane cushions that expand in the ear canal
  • Superior isolation blocking ambient noise for focused listening
  • Four extra cushions included for extended comfort and hygiene

Specifications

BrandKossoration
ModelPLUG

Questions about this item

Does the Koss PLUG earbuds' frequency response cover the full range of human hearing from 10 Hz to 20,000 Hz?

Yes, the Koss PLUG earbuds deliver a frequency response of 10-20 000 Hz, reproducing deep bass and high treble within the limits of human hearing.

What physical fit do the Koss PLUG earbuds require inside the ear canal?

The Koss PLUG earbuds use soft hydrophilic foam cushions that expand to form a custom seal inside your ear canal for isolation and bass response.

How do you insert the Koss PLUG earbuds correctly so the foam cushion expands for a proper seal?

Compress the foam cushion by rolling it between your fingers, insert it into your ear canal, then hold it in place for a few seconds while the foam expands to create a custom fit.

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