Nady Systems QH-30NC Headphones User Manual


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USING YOUR HEADPHONES
1.Your headphones are supplied with an in-line battery compartment on the right
headband. Grasping the headphone firmly with your hands and slide the bat-
tery door as indicated by the arrow on the cover. Flip open the hinged door and
insert a single fresh alkaline AAA battery.
2.The headphones are provided with a 3.5mm stereo mini plug for the signal
input and can be used with a variety of AV equipment as supplied: CD, DVD, or
MP3/4 players, personal or laptop computers, or home stereo systems. It can
also be used for most airline audio with the dual plug adapter supplied. Some
audio sources with a 1/4” jack, such as professional audio mixers, require the
use of an optional readily available 1/4”—3.5mm mini stereo plug adapter. After
you have confirmed plug/jack compatibility, connect the headphones to the
equipment to which you will be listening.
3.Unfold the headphone and adjust the headband by pulling up or down on each
end so it rests gently on top of your head and the ear cup cushions fit comfort-
ably around your ears. Always wear the headphones with the battery compart-
ment on the right as marked on the headbands to ensure proper L/R stereo
sound.
4.Turn on the power for the noise canceling circuitry with the sliding ON/OFF
switch on the right earcup.The red LED will light whenever power is ON and
you should then hear that the ambient noise is reduced. If you're using the
headphones in a quiet location you may not need the noise-canceling feature.
In that case, simply leave the power OFF and use like standard passive head-
phones.
5.Turn on the power of the equipment to which are connected and you are ready
to enjoy listening noise-free, even if you are in a noisy environment.
6.Always make sure the power is turned off and LED is not lit whenever you are
storing the headphones or not using them.
7.Always fold the headphone for storage and transport.
TROUBLESHOOTING
No sound
• Check the connection of the headphones and the AV equipment to which is
connected
• Check that the connected AV equipment is turned on and the volume is up
Noise Reduction Absent
• Check that the headphones power is turned on (LED lit)
• Replace the battery with a fresh alkaline
SPECIFICATIONS
Driver ..............................................................................................30mm diameter
Frequency Response ..........................................................................20Hz-20KHz
Impedance..................................................................................................32 ohms
Maximum Power Output................................................................60mW (P.M.P.O.)
Sensitivity ..................................................................................10dB SPL at 1Khz
Noise Reduction Level ..................................................................-12dB @ 300Hz
Power Supply ..............................................................Single AAA alkaline battery
Plug ..............3.5mm stereo plug (dual prong airline audio plug adapter included)
Length of Cord ..................................................................................5 feet, +/-10%
Typical Battery Life ......................up to 25 hours (depending on listening volume)
For product improvement purposes, design and specifications are subject to change at any
time without prior notice
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QH30NC_userguide 2/5/07 9:32 AM Page 3
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