KRK KNS KNS6400 User manual

KNS SERIES
PROFESSIONAL HEADPHONES
USER MANUAL
KNS6400
KNS8400

2
CONTENTS
Your carton should contain the following items:
User manual (this document)
KNS-6400 or KNS-8400 headphones
Connection cable, with screw-in adaptor (tted)
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 obtained from:
382 Ave. de la Couronne, B-1050 Brussles
Authorized European representative:
Phone: [phone]
Fax: [phone]
WARNING: This product contains a chemical known to the State of California to cause
cancer and birth defects or other reproductive harm.

3
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: If water or other foreign objects enter the inside of the device, re or electric
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 securly 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”.

4
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.
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
DANGER
RISK
SAFE
170
180
190
SPL(dB)RELAT IVE LEVELRISKS/ACTIONS
RISK OF WINDOWS BREAKING JET ENGINE
(RISK OF PERMANENT HEARING DAMAGE - CONTINUOUS)
SPACE SHUTTLE LAUNCH
THEORETICAL LIMIT IN AIR
CYMBAL STRIKES / HIGH HATS
FULL SYMPHONY ORCHESTRA
JACK HAMMER AT 1m
BUSY ROAD TRAFFIC
QUIET OFFICE
QUIET RESIDENTIAL
CALM BREATHING
LEAVES RUSTLING
NORMAL OFFICE
HOME THEATRE / TV
PERSONAL AUDIO SYSTEMS
RECORDING STUDIO
87dB EXPOSURE LIMIT
85 dB UPPER EXPOSURE ACTION
80 dB LOWER EXPOSURE ACTION
140 dB PEAK EXPOSURE LIMIT
137dB PEAK UPPER EXPOSURE ACTION 137.5 dB = PAIN THRESHOLD (AVERAGE)
135 dB PEAK LOWER EXPOSURE ACTION
AUDITORY THRESHOLD
(RISK OF PERMANENT HEARING DAMAGE - PEAK)
LOUD CONCERT ROCK/ELECTRONIC
EMERGENCY SIREN
CANON FIRING
LISTENING DURATION GUIDANCE
120dB
115dB
110dB
105dB
100dB
95dB
90dB
Avoi d or take reduction precautions
15 minutes
30 minutes
1 hour
2 hour s
4 hour s
8 hour s (level dependant)

5
WARRANTY
Please refer to the warranty card shipped with your product. Please also
ll 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 the local authority or your retailer where you purchased the
product.
This product’s packaging materials are recyclable and can be reused.
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.