Studio headphones

  • KRK KNS6400


  • KRK KNS6400

    Earcups rotate

  • KRK KNS6400

    Side view

  • KRK KNS6400

    Soft padding on headband and earcups


Our take on the KRK KNS6400

by David Brown

The right headphones for the studio

When you're recording, headphones are the crucial link between you and your music. Pro headphones offer accurate sound to help performers and producers focus on their craft. Most have closed-back earcups to prevent sound from leaking into mics, but others feature an open design for more spacious sound. All of them put a premium on comfort, with thick padding on the headband and earcups.

Made for the studio

When you're getting ready to lay down some tracks in the studio, few tools are as indispensable as a good pair of headphones. Make sure you choose a pair designed with the studio in mind. KRK's KNS6400 headphones are great for musicians, engineers, and producers. They deliver accurate sound and wide frequency response for a faithful representation of your music — from deep bass to crisp high frequencies. Plus, they offer excellent noise isolation, so you can focus on your performance. That means you hear your monitor mix clearly while your headphones block out live instruments. And you won't have to worry about sound leaking from your headphones into live mics, adding noise to the recording.

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A dependable recording companion

It takes many hours of multiple takes, mixing, and mastering to produce a quality recording. That's why you need headphones that won't make you restless after 20 or 30 minutes of wearing them. The KNS6400's foam earpads and leatherette headband padding ensure you can keep going until every detail is just right. Plus, the pads are all replaceable, just like the extra-long detachable cable. That means you can keep these headphones around for years as your go-to studio 'phones.


  • closed-back, around-the-ear design offers excellent noise isolation for studio use
  • 40mm neodymium dynamic drivers
  • foam ear cushions and leatherette headband padding offer long-lasting comfort
  • earcups rotate 90 degrees
  • 98-inch detachable cable with 1/8" miniplug
  • includes 1/4" adapter
  • carrying case included
  • ambient noise isolation: up to 26 dBA
  • total harmonic distortion: less than 0.1%
  • frequency response: 10-22,000 Hz
  • sensitivity: 95 dB SPL @1mW
  • impedance: 36 ohms
  • weight: 7 oz. (without cable)
  • warranty: 1 year
  • Our 60-day money-back guarantee

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

Product Research
What's in the box?

  • Studio monitor headphones
  • 8.2' Headphone cable
  • 1/4" adapter
  • Carrying case
  • Cleaning cloth
  • Owner's Manual

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.


KRK Sound: The KNS6400 headphones have been 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. KRK headphones provide incredibly natural frequency response that gives you a reference standard unaffected by your location.

Neodymium 40mm driver. The KNS6400 headphones employ high-efficiency 40mm drivers that deliver a large dynamic range with extremely consistent low-distortion detail and clarity. The 40mm drivers are exceedingly accurate, natural and offer wide frequency response. Extended low frequency definition, ensures the bass component of your music is accurately reproduced, and is not lost.

Closed Back Design: This closed-back around-the-ear design brings you closer to your music, and the highly isolated surround pads give you the freedom to immerse yourself in the sound without having your monitor mix "escape" into open microphones -- and keeps live instruments out of what you are monitoring.

Detachable Cable & Connector: The KNS6400 uses a high durable 8.2' single-sided straight cable with oxygen-free copper wires. The 1/4" jack plug can be unscrewed to reveal a 1/8" plug for laptops and portable media players.

Portable: Adjustable, foldable driver enclosures provide comfort and portability. Included is a soft carrying case embossed with the KRK logo for traveling or storage when not in use.

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For a more in-depth review and enhanced detailed information on the KRK KNS6400, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_848KNS6400/KRK-KNS6400.html ).

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