Sony MDR NC20 User Manual

3-810-31/-12 (1}
SONY
Noise Canceling
Stereo
Headphones
Operating Instructions
Manual de instrucciones
MDR-NC20
Sony Corporation © 1996 Printed in Japan
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
To avoid electrical shock, do not open the
cabinet. Refer servicing to qualified
personnel only.
WARNING
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device mav not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause
undesired operation.
You are cautioned that any changes or modifications
not expressly approved in this manual could void
vour authority to operate this equipment
Owner's Record
The model number is located at the rear side of the
battery box.
The serial number is located at the both sides of the
head band.
Record these numbers in the spaces provided below,
Refer to them whenever vou call upon your Sony
dealer regarding this product.
Model No. MDR-NCO2?0
Serial No.
es es ee ee ee a se
Features
e Noise canceling headphones reduce ambient noise,
and provide a quieter environment to enhance audio
entertainment. Ambient sound is synthesized with
an anti-sound signal produced by the noise
canceling circuit, and reduced. (Over 10 dB is
reduced at 300 Hz.)
Compact folding Style
Neodymium magnets are used to deliver powerful
sound.
Operates as passive headphone when noise
canceling circuit is not activated.
Plug adaptor is supplied to connect directly to stereo
or dual jack of inflight music services.
Plug types are compatible with Sony WALKMANY*,
Discman or MD WALKMAN remote controllers and
stereo mini jacks of audio and visual equipment.
* WALKMAN isa registered trademark of Sony
Corporation.

Sony MDR NC20 Specifications

General

Impedance	24 Ω
Driver unit	30 mm
Magnet type	Neodymium
Headphone frequency	16 - 22000 Hz
Headphone sensitivity	102 dB
Battery type	AAA
Continuous audio playback time	45 h
Type	Dynamic
Connector(s)	Gold-Plated Mini-Plug
Power requirements	DC 1.5 V
Maximum input power	0.1 W
Cable length	0.5 m
Connectivity technology	Wired

Weight and Dimensions

Weight	175 g

Summary

Features

Installing a battery

Listening to music

Folding and unfolding headphones

Precautions

Cleaning and Maintenance

Clean headphones with a soft dry cloth; ensure plugs are clean to prevent distorted sound.

Servicing and Repair

Refer servicing and repair to a Sony dealer for ear pad changes or other issues.

Environmental Handling

Avoid exposing headphones to direct sunlight, heat, or moisture.

Headphone Usage Notes

Preventing Hearing Damage

Avoid high volume to prevent hearing damage; reduce volume if ears ring.

Safe Mobile Use

Do not use headphones while driving or cycling due to reduced ambient sound.

Troubleshooting

No Sound Issues

Check connections, AV equipment power, and volume levels for no sound.

Muffled Sound

Reduce AV equipment volume or replace the battery to resolve muffled sound.

Specifications

General Specifications

Details on type, driver units, impedance, sensitivity, frequency response, and input cord.

Power and Mass

Information on power source (battery type) and approximate mass of the headphones.

Supplied Accessories

List of included items such as connecting cords, plug adaptors, and carrying case.