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Koss RUK30

In-ear headphones (Blue)

4 Reviews

Item # 245RUK30L

This item is no longer available.

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Our take on the Koss RUK30

Better sound is within your budget

Koss has long been known for making great-sounding portable headphones that won't break the bank. Their RUK30 in-ear headphones are a terrific way to upgrade those stock earbuds without spending a fortune. These sleek, comfortable headphones are a great option if you want to enjoy music on your mobile device with no hassles. The flat, tangle-resistant cord will help eliminate annoying knots, so you can keep these earbuds in your pocket or bag for on-the-go listening. Koss includes three pairs of ear tips to help you find the right fit for proper noise isolation as well as comfort.

Easy to put in my ear and sound excellent

John, Cloveredale Ca

What's in the Box:

  • Blue earbud headphones with an attached 4' flat cord (3.5mm miniplug)
  • 2 Medium silicone tips (installed)
  • 2 Large silicone tips
  • 2 Small silicone tips
  • Limited Lifetime warranty sheet
  • Note on environmental protection

Product Highlights:

  • includes three pairs of silicon ear tips for optimum comfort and noise isolation
  • flat, tangle-resistant 4-foot miniplug cable
  • frequency response: 15-20,000 Hz
  • sensitivity: 110 dB
  • impedance: 16 ohms
  • warranty: lifetime
  • Our 60-day money-back guarantee

Koss RUK30 Reviews

Average Customer Review(s):

(4 Reviews)
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Hands-on research

Features and Specs

Fit Style In-ear/Earbud
Earcup Type Closed
Earcup Width x Height 0.55" x 0.55"
Noise-canceling No
Bluetooth No
Mic For Taking Calls No
iPhone Control ---
Lightning Connector No
Android Control ---
Frequency Response 15-20k Hz
Sensitivity 110 dB
Impedance 16 Ohms
Weight Not Given
Cord Length 48"
1/4-inch Adapter Included No
Volume Control No
Parts Warranty Lifetime
Labor Warranty Lifetime

Product Research


Overview: The Koss Rukus-series RUK30 features deep bold colors with a design that resembles a hex-head bolt. These noise-isolating in-ear headphones block exterior noise so you can hear your music clearly, without outside interruption.

Silicone Tips: The RUK30s come with three sizes of silicone ear tips (small, medium, and large) for a comfortable fit.

Cord: The headphones have a 4' straight, tangle-resistant flat cord with a slender 3.5mm straight plug. The small diameter plug design can be easily plugged into recessed headphone jacks or when the smartphone or digital music player is contained in a hard case.

Warranty: The RUK30s are covered by the Koss Stereophones Limited Lifetime Warranty.


  • Frequency Response: 15Hz-20kHz
  • Sensitivity (dB/1mW): 110dB
  • Nominal Impedance: 16 ohms

Our Product Research Team

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