Sony MDR-NC7 - Noise Canceling Headphones Manual

To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
To reduce the risk of electrical shock, do not open the cabinet. Refer servicing to qualified personnel only.

You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this equipment.

The validity of the CE marking is restricted to only those countries where it is legally enforced, mainly in the countries EEA (European Economic Area).

Features

Installing a battery

1. Rotate the left housing as illustrated.
   
2. Push the OPEN button to open the battery lid.
   
3. Insert one R03 (size AAA) battery by matching the on the battery to the in the battery case.
   
4. Close the lid.
   

Battery life

*¹ 1 kHz, 0.1 mW + 0.1 mW output

*² Time stated above may vary, depending on the temperature or conditions of use.

Note
Because the supplied battery was included in the package from the time of manufacture (as a convenience to the user), it is possible that the battery life may be somewhat depleted by the time of purchase. The actual life of the supplied battery may be shorter than the standard time described in this manual when using a fresh battery.

When to replace the battery

Replace the battery with a new one when the POWER indicator dims. The noise canceling feature may not work correctly if battery power is low.

If the battery lid is detached

Attach it as illustrated.

Listening to music

1. Connect the headphones to the AV equipment.
   
   * "WALKMAN" and "WALKMAN" logo are registered trademarks of Sony Corporation.
2. Turn on the power of the headphones. The POWER indicator lights in red. When the power is turned on, ambient noise is reduced, and you can listen to music more clearly at a lower volume.
   
   Note
   The noise canceling microphone is built inside each earpad. Do not put weight or force on the microphone as it may damage the microphone.
3. Wear the headphone marked on your right ear and the one marked on your left ear.
   

When using in an airplane

• The supplied plug adapter can be connected to the dual or stereo mini jacks in an airplane.
  

If you have any questions or problems concerning the system that are not covered in this manual, please consult the nearest Sony dealer.

After listening to music

Turn off the power of the headphones.

Folding the headphones

Rotate the housings to make them flat for easy storage in the seat pocket.
Restore to their usual position before using.

Fold the headphones as illustrated for easy storage in the carrying pouch (supplied).

Precautions

The headphones contain a noise canceling circuit.

What is noise canceling?

The noise canceling circuit actually senses outside noise with built-in microphones and sends an equalbut-opposite canceling signal to the headphones.

Notes on usage

Notes on headphones

Preventing hearing damage

Avoid using headphones at high volume. Hearing experts advise against continuous, loud and extended play. If you experience a ringing in your ears, reduce the volume or discontinue use.

Do not use headphones while driving and cycling, etc.

As headphones reduce outside sounds, they may cause a traffic accident. Also, avoid listening with your headphones in situations where hearing must not be impaired, for example, a railroad crossing, a construction site, etc.

Troubleshooting

No sound

Muffled sound

Power does not turn on

Howling

Specifications

General

Type: Closed, dynamic

Driver unit: 30 mm, dome type (CCAW adopted)

Power handling capacity: 100 mW

Impedance: 33 Ω at 1 kHz (when the power is on), 35 Ω at 1 kHz (when the power is off)

Sensitivity: 102 dB/mW (when the power is on), 100 dB/mW (when the power is off)

Frequency response: 30 – 20,000 Hz

Total Noise Suppression Ratio*¹: Approx. 9 dB*²

Cord: Approx. 1.5 m (59 ¹/₈ in) OFC litz cord

Power source: DC 1.5 V, 1 × R03 (size AAA) battery

Mass: Approx. 134 g (4.7 oz) including battery

Supplied accessories

Sony R03 (size AAA) battery (1)

Carrying pouch (1)

Plug adaptor for in-flight use*³ (single/dual) (1)

Operating Instructions (1) Card warranty (1)

*¹ Under the Sony measurement standard.

*² Equivalent to approx. 87.4% reduction of energy of sound compared with not wearing headphones.

*³ May not be compatible with some in-flight music services.

Design and specifications are subject to change without notice.

©2008 Sony Corporation Printed in Malaysia