KRK SYSTEMS KNS6402 KNS Series Professional Headphones User Manual

: June 9, 2024
: KRK SYSTEMS

KRK SYSTEMS KNS6402 KNS Series Professional Headphones

REGULATORY CERTIFICATION

KRK declare under our sole responsibility that this product, to which this declaration relates, is in conformity with the following standards:

The Declaration of Conformity can be obtained from: 382 Ave. de la Couronne, B-1050 Brussles
Authorized European representative:

Phone: +3226450500
Fax: +326

WARNING: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm.450505

SAFETY

The possible results of incorrect use are marked by one of the two symbols “WARNING” and “CAUTION”, depending on the imminence of the danger and the severity of the damage.

WARNING: Ignoring these warnings may cause severe injury or death as a result of incorrect operation.
CAUTION: Ignoring these cautions may cause moderate injury or damage as a result of incorrect operation.
NOTE: This advice ensures you continue to get the best long term performance from your headphones.
WARNING: shock may result.
WARNING: Do not attempt to disassemble or modify this product. Doing so could result in personal injury and / or product failure.
WARNING: Do not use mobile phone adaptors to connect headphones to the jack sockets on airplane seats. This can cause overheating possibly resulting in personal injury such as burns, et
WARNING: Do not use headphones when driving or operating any kind of mechanized transport. Safety of yourself and pedestrians is put at risk as you are prevented from hearing external warning noises.
CAUTION: The character of external warning sounds can be affected during headphone use. Ensure you can still recognize these sounds before use.
CAUTION: Do not subject headphones to extreme force such as dropping, impact from another object, or impact from poorly packed luggage.
CAUTION: Do not pull, or put excessive strain on the headphone cable, this may cause damage and /or failure.
CAUTION: Keep the product dry and avoid exposure to extreme temperatures and humidity.
CAUTION: Ensure the headphone plug is securely being held when disconnecting the cable; never pull on the cable as this could cause damage to the connections.
NOTE: It is common for the headphone ear cushions to gradually deteriorate over time; this is commonly known as “wear and tear”.

SAFETY LISTENING GUIDANCE

WARNING: LISTENING TO AUDIO AT EXCESSIVE VOLUMES CAN CAUSE PERMANENT HEARING DAMAGE. USE AS LOW A VOLUME AS POSSIBLE.
Over exposure to excessive sound levels can damage your ears resulting in permanent noise-induced hearing loss (NIHL). Please use the following guidelines established by the Occupational Safety Health Administration (OSHA) on maximum time exposure to sound pressure levels before hearing damage occurs.

WARRANTY

Please refer to the warranty card shipped with your product. Please also on KRK developments.

DISPOSAL

This symbol on the product, in the instructions or on the packaging means that your electrical and electronic equipment should be disposed at the end of its life separately from your household waste. There are separate collection systems for recycling in the EU. For more information, please contact the local authority or your retailer where you purchased the product.
We advise keeping the packaging for shipping, but if you choose to dispose of it, please do so in accordance with your local authorities regulations.

CARE AND MAINTENANCE

KNS Series headphones do not require a service schedule. Please follow the cautions below when cleaning your product.

CAUTION: Only use the provided anti-microbial/bacterial cloth to clean your headphones; this will help maintain good hygiene.
CAUTION: Never use solvents or thinners to clean the headphones, this can damage the headphones.
CAUTION: If the headphones become excessively dirty wipe down with a slightly damp non-abrasive cloth, then dry immediately.
CAUTION: While cleaning your headphones, please avoid getting liquid and/or foreign objects in the driver ports, volume control and connections.

WELCOME

Congratulations on your choice of headphones, and welcome to the ever growing family of KRK owners.
forever change the way you handle your most demanding audio jobs.
The KNS headphones feature key design elements that continue to make the KRK sound a “studio standard”. The series was created using stringent design philosophies applied to all of our products.
The result is a studio reference set of headphones that you can trust, highs.
Whether you are making critical mixing decisions or need to capture the Series deliver a new level of audio performance.
This manual is intended to inform you of the many features of your new KNS headphones. We encourage you to take a few minutes to familiarize yourself with this manual.
Thank you once again for choosing KRK!

USAGE GUIDANCE

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

DESIGN PHILOSOPHY

Any studio monitor is a tool used to aurally “measure” the changes in an audio path. Ask any seasoned recording professional what they think
From years of listening to feedback from some of the top engineers and producers, the KRK design team has an in-depth understanding how a properly tuned monitor is a critically important recording tool.
The KNS series headphones are designed, engineered and tuned to possible so that what you hear represents the true nature of the audio material without coloration or enhancement.
Using professional monitors in an acoustically correct studio is ideal for recording, mixing and mastering – but there are times when portability,
are the priority.
The KNS Series from KRK is becoming the headphone of choice for mix analysis. After all, hearing what is wrong with your mix is just as important as hearing what is right! At KRK, our passion is monitoring and accurately reproducing a natural, honest sound everywhere in the control room, the KNS series are no exception.
Whether you are mixing tracks, or recording your next song, the KNS series gives you the famous KRK sound independent of your monitors. This closed-back around-the-ear design brings you closer to your music, and the highly isolated memory foam ear cushions provide incredible isolation and long term comfort.
Having “One Voice” that consistently gives you an accurate reproduction of your music or mix will help you to achieve just what the artist intended.
Especially when the artist is you!

DESIGN PHILOSOPHY

Any studio monitor is a tool used to aurally “measure” the changes in an audio path. Ask any seasoned recording professional what they think
From years of listening to feedback from some of the top engineers and producers, the KRK design team has an in-depth understanding how a properly tuned monitor is a critically important recording tool.
The KNS series headphones are designed, engineered and tuned to possible so that what you hear represents the true nature of the audio material without coloration or enhancement.
Using professional monitors in an acoustically correct studio is ideal for recording, mixing and mastering – but there are times when portability,
are the priority.
The KNS Series from KRK is becoming the headphone of choice for mix analysis. After all, hearing what is wrong with your mix is just as important as hearing what is right! At KRK, our passion is monitoring and accurately reproducing a natural, honest sound everywhere in the control room, the KNS series are no exception.
Whether you are mixing tracks, or recording your next song, the KNS series gives you the famous KRK sound independent of your monitors. This closed-back around-the-ear design brings you closer to your music, and the highly isolated memory foam ear cushions provide incredible isolation and long term comfort.
Having “One Voice” that consistently gives you an accurate reproduction of your music or mix will help you to achieve just what the artist intended.
Especially when the artist is you!

FEATURES

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 especially during long periods of use. 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.
Transparent reproduction of high-frequencies, resulting in highly accurate imaging
Designed to last, made from durable, impact resistant materials throughout the system.
Designed in Nashville, TN, made in China.
High-efficiency Neodynium 40mm driver
High durability 2.5m single-sided straight cable with oxygen-free Copper wires
KNS-8402 comes with a replaceable 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.
Adjustable, foldable driver enclosures provide comfort and portability
Replacable cable, head, and ear cushions to ensure long product life
Soft carrying case embossed with the KRK logo for travelling engineers, or storage when not in use.
jack plug can be unscrewed to reveal a 1/8 plug for laptops and portable media players.
Anti microbial/bacterial cleaning cloth
User instructions and warranty

SPECIFICATIONS

System / Design
Dynamic
Operating System
Closed-back
Head Coupling
Circumaural (Isolating)
Voice Coil
Copper-clad aluminum wire
Driver Type
Low weight neodymium
Driver Diameter
40mm
Sensitivity/ Efficiency
[KNS-6402] 95dB SPL @1mW
[KNS-8402] 97 dB SPL @1mW
Frequency Response
[KNS-6402] 10Hz-22 kHz
[KNS-8402] 5Hz-23 kHz
Total Harmonic Distortion
0.1%
Rated Impedance
36 ohms
Ambient Noise Isolation
[KNS-6402] up to 26 dBA
[KNS-8402] up to 30 dBA
Long Term Maximum Power Handling 1000mW
(500mW per side as per IEC 60268-7)
Earcup Rotation
90 degrees
Nominal Headband Pressure
4 N (based on average head size)
Headband Type
Adjustable / Sprung steel skeleton
Ear Cushion type
Acoustic cellular foam [KNS-6402] Acoustic memory foam [KNS-8402]
Headpad Finish
Leatherette [KNS-6402] Premium leatherette [KNS-8402]
Headphone Finish
Black impact resistant plastic
Cable
2.5 m, (8.2 ft.), 99,99% OFC detachable
Connector
Gold-plated stereo 1/8” (3.5 mm)
Cable Connection
Strain relief managed
Adaptor
Screw-on 1/4” (6.3 mm)
Weight without Cable
[KNS-6402] 202 g (0.44 lb)
[KNS-8402] 247 g (0.54 lb)
Net / Shipping Weight
[KNS-6402] 820 g (1.8 lb)
[KNS-8402] 865 g (1.91 lb)
Dimensions
245 mm x 268 mm x 94 mm
9.6” x 10.5” x 3.7”

ACCESSORIES AND PART NUMBERS

Part Numbers:

KNS-6402 KNS 6402 HEADPHONE
KNS-8402 KNS 8402 HEADPHONE
CUSK00001 CUSHION EAR KNS 6402
CUSK00002 CUSHION HEAD KNS 6402
CUSK00003 CUSHION EAR KNS 8402
CUSK00004 CUSHION HEAD KNS 8402
CBLK00027 CABLE COILED 2.5 M KNS
CBLK00028 CABLE STRAIGHT 2.5 M KNS
CBLK00029 CABLE STRAIGHT 3M EXTENSION KNS
CBLK00030 CABLE STRAIGHT 10M EXTENSION KNS
CBLK00031 VOLUME CONTROL KNS
BAGK00009 BAG PROTECTIVE KNS
CONK00007 CONNECTOR 1/8” to 1/4” ADAPTER KNS

Replacement parts and accessories:
Accessories or replacement parts can be ordered through KRK this document for contacts in your territory.

WEARING/ADJUSTING GUIDE

Place the headphones on the head guided by the markings which identify the left and right driver enclosures. Adjust the headband as shown
comfortably around your ears. The driver enclosure is connected using
optimum performance. There should not be excessive pressure when the headband is adjusted correctly.

CONNECTING

The KRK KNS series headphones connect with almost any professional and consumer audio device such as Professional Live, Recording and
computers, personal media players, CD/DVD/Blu-Ray players.
of headphones. In this instance, the headphones are ready to use as Personal computers, media players and some consumer devices utilize an 1/8” socket for connection of headphones. In this instance, please
connection. Please remember to store the adaptor safely so that it can be used when necessary.
Insert the headphone plug securely into the audio jack of the selected audio device.

NOTE: KRK recommends turning off all sound enhancements / special effects present in some consumer devices before use. This processing can prevent you from getting the best performance from your headphones.
WARNING: The KNS headphones when driven by high-powered
which can damage hearing over time. Please ensure good care when connecting, setting up, and using your headphones. Keep in mind that your ears are the most important tool of your trade, please treat them accordingly.
WARNING: interface is set to minimum and slowly raised to the required operating level.

CABLE CONNECTION GUIDE

Insert sub-mini connector into socket (from cable or headphone volume control)
When properly inserted you will feel it “click” into place.
Now turn the plug clockwise in the socket to secure the cable

VOLUME CONTROL CONNECTION GUIDE

CUSHION REMOVAL/FITTING GUIDE

REPLACING THE HEAD CUSHION
The head cushion is held in place by a mounting flange which snaps under small tabs located around the inside rim of the headband. If a head cushion becomes loose, simply push the mounting flange of the earcup cushion back into the earcup. Using your finger or thumb, press around the edge of the mounting flange, making sure it “snaps” in place all the way around the head cushion.

REPLACING THE EAR CUSHIONS
The ear cushions are held in place by a mounting flange which snaps under small tabs located around the inside rim of the driver enclosure. If an ear cushion becomes loose, simply push the mounting flange of the ear cushion back into the driver enclosure. Using your finger or thumb, press around the edge of the mounting flange, making sure it snaps in place all the way around the ear cushion.

STORAGE AND PROTECTION

To ensure your headphones are well protected during travel there is a specially designed soft bag included in the package. and that it is tied securely to prevent anything from entering the bag which could cause damage.

TROUBLESHOOTING

Problem : What to do

No audio Ensure your device is plugged in correctly
Ensure your device is connected to the correct socket
Ensure the source is sending audio and the output level is good.
Excessive bass Turn off any bass boost features on the source device
Distorted bass Make sure that the driver enclosure ports are not blocked, if they become blocked, please clean as directed.
Distorted sound Ensure that the driver enclosure ports are not blocked, if they become blocked, please clean as directed

If any problem persists, contact Customer Service. See the phone number for your area included in this guide.