Studio headphones

  • KRK KNS8400


  • KRK KNS8400

    In-line volume control

  • KRK KNS8400

    Rotating earcups

  • KRK KNS8400

    Side view

  • KRK KNS8400

    Soft padding on headband and earcups


Our take on the KRK KNS8400

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.

The link between your ears and your music

Recording musicians — from first-timers to seasoned pros — rely on their ears to guide them in the studio. Those ears would be lost without a great pair of headphones to feed them accurate sound. That's the crucial role filled by the KRK KNS8400. These full-size headphones are designed with musicians, engineers, and producers in mind, so they can hear nuances that might escape less attuned ears. They offer fine detail across a broad frequency range, giving equal attention to deep bass, warm mids, and clean highs. These headphones can help you identify what is missing from your recording as well as pinpoint any noise that shouldn't be there.

Read more

Excellent noise isolation

The KNS8400 headphones feature a closed-back, circumaural design. That means the soft, cushioned earpads fit completely around your ears, forming a seal that keeps sound from leaking out of or into the headphones. This allows you to clearly hear your monitor mix in the headphones without other live instruments bleeding in. Also, sound from the headphones won't leak out into live mics. This makes them ideal for performers who depend on good headphone monitoring to deliver that killer take. Plus, they're comfortable enough to wear for hours for all those retakes and overdubs.

In-line volume control

Normally, if you want more volume in your headphones, you need to reach for the mixing board or get the engineer's attention. But with the KNS8400 headphones, you can maintain volume control with the in-line remote. It's removable if you'd rather let the control room handle your monitor levels. The headphones also come with a screw-on 1/4” adapter, so you can plug them into a mixing console or use the cable's miniplug connector with your smartphone outside the studio.


  • closed-back, around-the-ear design offers excellent noise isolation for studio use
  • 40mm neodymium dynamic drivers
  • memory foam ear cushions and leatherette headband padding offer long-lasting comfort
  • earcups rotate 90 degrees
  • 98-inch detachable cable with 1/8" miniplug
  • detachable in-line volume controller
  • includes 1/4" adapter
  • carrying case included
  • ambient noise isolation: up to 30 dBA
  • total harmonic distortion: less than 0.1%
  • frequency response: 5-23,000 Hz
  • sensitivity: 97 dB SPL @1mW
  • impedance: 36 ohms
  • weight: 8.2 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
  • Volume control
  • 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 KNS8400 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 KNS8400 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.

Memory Foam Earpads: The KNS8400's earpads utilize the latest in acoustic memory foam technology to ensure class leading performance in both reproduction and isolation. Memory phone also adds to the comfort of the headphone, even over extended periods of use to avoid feeling uncomfortable during long sessions. The special memory foam conforms to the ear to help ensure an improved fit.

Detachable Cable & Connector: The KNS8400 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.

In-Line Volume Control: KNS-8400 features an in-line volume control with a sleek profile which is designed not to catch on clothing or instruments during performance. The volume control also uses a high quality long-life fader and comes in a sturdy enclosure.

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.

Applications: The KNS series headphones are designed for critical listening and monitoring in the following situations:

  • Engineer/Artist Recording Studio: Mixing / Monitoring / Recording
  • Engineer/Artist Broadcast Studio: Mixing / Monitoring / Recording
  • Musician/Artist Studio: Monitoring / Composition / Recording
  • Musician/Artist: Live/Stage, Monitoring
  • Technician: Monitoring at any location
  • General: Personal music listening
Be the first to review this product
Great Gear Giveaway rewards card

Submit a review and then enter to win a $500 rewards card

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

Add accessories for the KRK KNS8400

Make sure you've got plenty of power for all your studio headphones. See all categories & accessories

PreSonus HP4 4-channel headphone distribution amplifier
Your Price: $129.99
Add to Cart

Why choose SquareTrade?

The #1-Rated Protection Plan

Thousands of people have reviewed SquareTrade Protection Plans — and made us #1.

5-Day Service Guarantee & Free Shipping

We'll repair or replace your item in five business days or less after we've received it, or your plan is free. And, as always, we pay for all shipping.

Protection from Normal, Everyday Use

Repairing your average mechanical or electrical failure can cost as much as buying a new device. With SquareTrade, you're covered — including parts and labor.

For a more in-depth review and enhanced detailed information on the KRK KNS8400, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_848KNS8400/KRK-KNS8400.html ).

Find the gear that's right for you
Ask an expert
Your Crutchfield Advisor knows the gear inside and out.
Call 1.800.555.9369
Ask an expert

Compare with other KRK models

  • KRK KNS8400
  • Get volume control and more noise isolation
  • In Stock
  • The KRK KNS8400 offers:
    • detachable in-line volume controller
    • ambient noise isolation: up to 30 dBA
    • memory foam ear cushions
  • Add To Cart
  • KRK KNS6400
  • In Stock
    • The KRK KNS6400 offers:
      • closed-back, around-the-ear design offers excellent noise isolation for studio use
      • foam ear cushions and leatherette headband padding offer long-lasting comfort
      • 98-inch detachable cable with 1/8" miniplug and 1/4" adapter
  • Add To Cart
  • KRK KNS8400
  • In Stock
    • The KRK KNS8400 offers:
      • closed-back, around-the-ear design offers excellent noise isolation for studio use
      • 98-inch detachable cable with in-line volume control
      • memory foam ear cushions and leatherette headband padding offer long-lasting comfort
  • Add To Cart
You are here

Searches related to the KRK KNS8400 Studio headphones