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                        KNS SERIES
PROFESSIONAL HEADPHONES 
KNS6400
KNS8400
USER MANUAL                                                                                                                                                                                                                                                                                                                                                                                                                                                     
                    
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                        CONTENTS Your carton should contain the following items: User manual (this document) KNS-6400 or KNS-8400 headphones Connection cable, with screw-in adaptor (fitted) Protective soft bag Anti-Microbial/Bacterial cleaning cloth KNS-8400 type contains an additional in-line volume control 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 obtai
                    
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                        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: 
                    
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                        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. RISKS/ACTIONS SPL(dB)RELATIVE LEVEL 190 THEORE
                    
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                        WARRANTY Please refer to the warranty card shipped with your product.  Please also  fill in the attached registration card if you’d like us to keep you up to date  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 th
                    
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                        WELCOME Congratulations on your choice of headphones, and welcome to the ever  growing family of KRK owners.  KRK’s KNS Series of professional studio headphones are designed to  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 y
                    
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                        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  makes a great monitor and you’ll get the same consistent answers:  “Accuracy, transparency, flat response, and the truth.”  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 
                    
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                        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 is
                    
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                        FEATURES • High-efficiency Neodynium 40mm driver • High durability 2.5m single-sided straight cable with oxygen-free   copper wires • KNS-8400 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 c
                    
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                        SPECIFICATIONS System / Design   Nominal Headband Pressure Dynamic 4 N (based on average head size)     Operating System Headband Type Closed-back   Adjustable / Sprung steel skeleton Head Coupling Ear Cushion type  Circumaural (Isolating)  Acoustic cellular foam [KNS-6400]     Acoustic memory foam [KNS-8400] Voice Coil Copper-clad aluminum wire Headpad Finish     Leatherette [KNS-6400] Driver Type    Premium leatherette [KNS-8400] Low weight neodymium Headphone Finish  Driver Diameter   Black i
                    
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                        ACCESSORIES AND PART NUMBERS Part Numbers: KNS-6400 KNS 6400 HEADPHONE KNS-8400 KNS 8400 HEADPHONE CUSK00001   CUSHION EAR KNS6400 CUSK00002 CUSHION HEAD KNS6400 CUSK00003 CUSHION EAR KNS8400 CUSK00004 CUSHION HEAD KNS8400 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 CBLK00032 CABLE STRAIGHT 1.5 M KNS  BAGK00009 BAG PROTECTIVE KNS CONK00007 CONNECTOR 1/8” to 1
                    
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                        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  below so it rests gently on top of your head and the ear cushions fit  comfortably around your ears.  The driver enclosure is connected using  an adjustable yoke which will naturally turn to ensure proper fitting, and  optimum performance.  There should not be excessive pressure when the  headband is adjusted correctly. 12           
                    
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                        CONNECTING The KRK KNS series headphones connect with almost any professional  and consumer audio device such as Professional Live, Recording and  Broadcast Mixers, Audio Interfaces, Headphone Amplifiers, personal  computers, personal media players, CD/DVD/Blu-Ray players. Most professional audio equipment utilizes a ¼” socket for connection  of headphones.  In this instance, the headphones are ready to use as  supplied with the ¼ screw-in adapter fitted. Personal computers, media players and so
                    
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                        CABLE CONNECTION GUIDE   1. Insert 1/8” connector into socket (from cable or headphone volume  control) 2. When properly inserted you will feel it “click” into place. 3. Now turn the plug clockwise in the socket to secure the cable VOLUME CONTROL CONNECTION GUIDE   14                                                                                                                                                                                                                                        
                    
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                        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 he
                    
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                        STORAGE AND PROTECTION To ensure your headphones are well protected during travel there is a  specially designed soft bag included in the package. Please ensure the headphones are fitted into the bag as shown below  and that it is tied securely to prevent anything from entering the bag which  could cause damage. 16                                                                                                                                                                                        
                    
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                        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  
                    
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                        CONTACT DETAILS POSTAL:   KRK Systems, LLC.     772 S. Military Trail     Deerfield Beach, FL 33442 WEB:    www.krksys.com SALES EMAIL:    salesorders@krksys.com TELEPHONE:   +1 954-949-9600, option 1 FAX:    +1 954-949-9590 CUSTOMER SUPPORT EMAIL:    service@krksys.com TELEPHONE:   +1 954-949-9600, option 3 FAX:    +1 954-949-9590 REPAIRS/RETURNS EMAIL:    returns@krksys.com TELEPHONE:   +1 954-949-9600, option 2 FAX:    +1 954-949-9590 MARKETING COMMUNICATIONS: marketing@krksys.com HUMAN RESOU
                    
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                        NOTES 19                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
                    
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                        LITK00063 - REV B - KNS USER MANUAL