Sony MDR-NC40 Noise-Cancelling Dynamic Stereo Headphones User Guide
Precautions
- Do not put weight or pressure on the headphones as it may cause the headphones to deform during long storage.
- The earpads may deteriorate due to long-term storage or use.
- Be careful not to catch your finger as you fold the headphones.
- Clean the headphones with a soft dry cloth.
- Do not leave the jack plug dirty otherwise the sound may be distorted.
- Be sure to bring the headphones to the Sony dealer when requiring a change of earpads or repair work.
- Do not leave the headphones in a location subject to direct sunlight, heat or moisture.
- Do not subject the headphones to excessive shock.
- Handle the driver units carefully.
- If you fell drowsy or sick while using these headphones, stop use immediately.
- If headphone sound is noisy, move the battery box away from sources of interference, such as a radio, etc.
Listening to Music
- Connect the headphones to the AV equipment
Wear the headphones marked (R) in your right ear and the one marked (L) in your left ear.
Turn on the power of the headphones. The power indicator lights in red. The power switch is located on the battery box. When power is turned on, ambient noise is reduced, and you can listen to music more clearly at a lower volume.
Start playing on the AV equipment. When the power switch is set to on, noise canceling can be deactivated while the MONITOR button is pressed so that you can hear ambient sound.
Wear the headphones marked (R) in your right ear and the one marked (L) in your left ear.
Turn on the power of the headphones. The power indicator lights in red. The power switch is located on the battery box. When power is turned on, ambient noise is reduced, and you can listen to music more clearly at a lower volume.
Start playing on the AV equipment. When the power switch is set to on, noise canceling can be deactivated while the MONITOR button is pressed so that you can hear ambient sound.
When using in an airplane
- The supplied plug adapter can be connected to the dual or stereo mini jacks in an airplane.
- Do not use the headphones when use of electronic equipment is prohibited or when use of personal headphones for in-flight music services is prohibited. If you have any questions or problems concerning the system that are not covered in this manual, please consult the nearest Sony dealer.
Installing a battery
- Push and slide the compartment lid on the rear of the battery box fully, and open. Before opening the compartment lid, check that the claws of the lid are seen.
Insert one R03 (size AAA) battery, matching the (+)on the battery to the (+)in the battery compartment.
Close the lid.
Insert one R03 (size AAA) battery, matching the (+)on the battery to the (+)in the battery compartment.
Close the lid.
Unfolding the headphones
Storing the headphones in the carrying case
When storing the headphones in the supplied carrying case, set the inner partition up, fold the headphones and store. The plug adaptor and reserve battery can also be stored in the pockets of the carrying case.
Features
- Noise canceling headphones reduce unwanted ambient noise, providing a quieter environment to enhance your
listening experience. - Lightweight design (less than 3 oz. for headphones portion) reduces stress on head.
- Soft and comfortable fit from pressure-relieving urethane ear cushion.
- Compact, folding design convenient for travel use.
- Compact battery box with monitor function to silence the audio and listen outside.
Specifications
Type Closed, dynamic
Driver unit 30 mm, dome type (CCAW adopted)
Power handling capacity 50 mW
Impedance 68 Ω at 1 kHz (when the power is on) 30 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 14 Hz – 22,000 Hz
Supplied accessories
- Sony R03 (size AAA) battery (1)
- Carrying case (1)
- Plug adaptor for in-flight use*3 (single/dual) (1)
- Operating Instructions (1
Troubleshooting
No sound
- Check the connection of the headphones and the AV equipment.
- Check that the connected AV equipment is turned on.
- Turn up the volume of the connected AV equipment.
- Replace the battery.
Muffled sound
- Turn down the volume of the connected AV equipment.
- Replace the battery. The sound of the connected source device, such as radio and TV, cannot be heard, or headphone sound is noisy.
- Move the battery box away from the connected source device.
