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Koss RUK20

In-ear headphones (Black)

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  • Koss RUK20

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Item #: 245RUK20B
 
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Our take on the Koss RUK20

by David Brown

Fun earbuds to keep in touch with your music

Looking for an inexpensive pair of earbuds to take everywhere? The Koss RUK20 in-ear headphones are easy to keep in your pocket, purse or bag so you can enjoy music on your portable device anyplace and anytime. The RUK20 comes with three different-sized ear tips to help you find the right fit, so they block out noise and seal in sound for optimum bass response and clarity. Available in a variety of colors, choose your style and keep in touch with your music wherever you go.
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Highlights:

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

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Fit Style
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In-ear
Earcup Type
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Closed
Noise-canceling
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No
Bluetooth
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No
Frequency Response
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16-20k Hz
Sensitivity
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110 dB
Impedance
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16 Ohms
Weight
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Not Given
Cord Length
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48"
Airline Adapter Included
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No
iPod Control
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No
Volume Control
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No
Built-in Microphone
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No
Parts Warranty
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Lifetime
Labor Warranty
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Lifetime
Product Research
What's in the box?

Download owner's manual

  • Black earbud headphones with attached 4' cord (3.5mm plug)
  • 2 Medium black silicone tips (installed)
  • 2 Large black silicone tips
  • 2 Small black silicone tips
  • Limited Lifetime Warranty sheet

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Overview: The Koss Rukus-series RUK20 features unique color combinations for expressing your own personal style. These noise-isolating in-ear headphones block exterior noise so you can hear your music clearly, without outside interruption.

Silicone Tips: The RUK20s come with three sizes of silicone ear tips (small, medium, and large) for a comfortable fit.

Cord: The headphones have a 4' straight 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 RUK20s are covered by the Koss Stereophones Limited Lifetime Warranty.

Specifications:

  • Frequency Response: 16Hz-20kHz
  • Sensitivity (dB/1mW): 110dB
  • Nominal Impedance: 16 ohms
 
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For a more in-depth review and enhanced detailed information on the Koss RUK20, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_245RUK20B/Koss-RUK20-Black.html ).