KRK KNS 8400 Closed-Back Around-Ear Stereo Headphones
With Volume Control, 36 Ohms, 5Hz-23kHz Frequency Response, 3.5mm Plug with 1/4 Adapter

These KRK KNS 8400 headphones are new in factory sealed box. It’s listed as mint because I’m not an KRK dealer. Also, the proceeds from the sale of these headphones will be donated to “Music Has Healing Power” foundation  to help kids who are in-need of medical help and can’t afford it. We are also building music rooms/studios at several Shriners Hospitals for Children for the kids and their families. 


KRK Headphones provide a precise listening experience that takes you from personal studio to commercial studio to on-the-go track evaluations -- and they allow you to accurately enjoy your music with the consistent voicing philosophy and honest reproduction top producers, studio musicians, performers and engineers have come to trust. KRK headphones provide incredibly natural frequency response that gives you a reference standard unaffected by your location. Day or night. Studio or home. Without disturbing others. Without compromising your tracks. Passionate about music and interested in experiencing the artist's vision as it was intended to be heard? Then experience KRK.

  • Voiced to remain true to the character of KRK's class leading studio monitors, developed with 25 years of years of experience in studio sound.
  • The latest reference quality frequency response for closed-back, circum-aural dynamic headphones.
  • Newly developed headphone acoustical system bringing a new level of headphone performance for the first time.
  • Utilizing the latest in acoustic memory foam technology ensures class leading performance in both reproduction and isolation.
  • A new standard in headphone comfort, even over extended periods of use, designed to avoid feeling uncomfortable during long sessions. The special foam conforms to the ear to help ensure an improved fit.
  • Exceedingly accurate, natural and wide frequency response.
  • Large dynamic range with extremely consistent low-distortion detail and clarity.
  • Extended low frequency definition, ensures the bass component of your music is accurately reproduced, and is not lost.
  • 1/4" jack plug can be unscrewed to reveal a 1/8" plug for laptops and portable media players.
Please don’t hesitate to get in touch with any questions. Thanks for your interest.


·       On-ear Headphones

·       Closed-back Headphones


Closed Back, Circumaural

Closed Back, Circumaural

System Type

Dynamic Headphones


2.5 M, (8.2 FT), 99.99% OFC Detachable

Ear Cushion Type

 Acoustic Memor Foam


Headpad Finish

 Premium Leatherette

Nominal Headband Pressure

4N (Based on Average Head Size)

Ambient Noise Isolation

Up to 30 dBA


40mm Neodymium

Nominal Impedance

36 ohms

Frequency Response

5Hz - 23kHz

Sensitivity (1MW)

97 dB SPL

Calculated Max SPL

124 dB SPL


Gold-Plated Stereo 1/8" (3.5mm)

Volume Control

Detachable/Replaceable Low-Profile Inline HQ Control



Black Impact Resistant Plastic

Black Impact Resistant Plastic


3.7" (94mm) X 10.5" (268mm) X 9.6" (245mm)

3.7" (94mm) X 10.5" (268mm) X 9.6" (245mm)


0.54 lb (0.247 kg)

0.54 lb (0.247 kg)

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listed2 months ago
ConditionMint (Used)
Mint items are in essentially new original condition but have been opened or played.learn more
  • KNS8400 Closed-Back On-Ear Studio Headphones
  • Black
  • 2021

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Agoura Hills, CA, United States
Joined Reverb:2018

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