Nady Systems QH-30NC warranty Using Your Headphones, Troubleshooting, Specifications, No sound

QH30NC_userguide 2/5/07 9:32 AM Page 3

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.