Sony MDR-NC40 Noise Canceling Headphones with Premium Travel Case

Sony
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About Sony

The Sony MDR-NC40 Noise Canceling Headphones shuts out up to 80% of the ambient noise around you. Great for work, traveling or just when you're trying to sleep in a loud place, they provide a calming atmosphere no matter where you are. The pressure-relieving cushion offers premium comfort and the lightweight, folding design makes storing them a breeze. It includes a premium travel case and "AAA" batteries.

Sony Features

  • High quality noise canceling up to 80%
  • Range of active noise attenuation more than 14dB at 300 Hz
  • Audio pass through even without battery (no noise cancelation without battery)
  • Premium travel case
  • Lightweight, foldable design
  • Soft, comfortable ear cushions
  • Operates for up to 40 hours on a single AAA battery
  • Can be used battery-free without noise cancellation
  • Neodymium drivers for excellent sound quality
  • Standard 3.5mm mini plug and airplane adapter for wide compatibility

Sony Specifications

Cord
4.9 foot OFC litz cord (Including battery box)
Headphone Type
Closed, dynamic
Design
Premium over the head, Noise canceling
Headband
Adjustable and Foldable
Magnet
Neodymium
Plug
L shaped stereo mini plug (Gold)
Type of Use
Noise canceling
Battery Life (Approx)
Up to 40H (with alkaline battery)
Battery Type
DC1.5V, 1 size AAA battery
Power Handling Capacity
50mW
Cord Length (Approx.)
4.9 foot (1.5m) including battery box
Driver Unit
30mm diameter, dome type
Frequency Range
50- 1,500Hz (active noise attenuation)
Frequency Response
14 - 22,000Hz
Impedance
68 ohms at 1kHz (on); 30 ohms at 1kHz (off)
Noise Level
ON/OFF switch on battery box
Sensitivity (db)
102dB/mW (on); 100dB/mW (off)
Weight (Approx.)
3.8 oz. (107g)-without battery, 4.2 oz (119)- with battery
Warranty
Sony 90 days limited warranty
Mfr #
MDRNC40
SKU
SOMDRNC40

Reviews about this item

Review Snapshot®

 
2.7

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

Most Liked Positive Review

 

First N.C. Headphones Ever Purchased

I haven't owned any other noise canceling headphones before and I have got to say these are worth every penny. I don't think I can go back to using ear buds, after using these. I've always liked sony because I believe you can never really go wrong with any of there merchandise and I see them as a really reliable source for great quality electronics & technology. I look forward to purchasing another pair. I am very satisfied with this product. Thanx Sony.

VS

Most Liked Negative Review

 

big disappointment value for money

battery runs out very quick. not a great noise canceling and actually big disappointment for the money paid.

Reviewed by 6 customers

 
5.0

LOVE!!! So Satisfied!!

By

from Anaheim

I absolutely love my headphones. They are exactly what I needed to tune out the "Chatty Kathys" in the computer lab so I can listen to my music and get some work done!! They are tough and durable enough to survive me, which is a miracle in itself. My dad got himself a pair of the Boise noise cancelling headphones, so I was able to compare... Not only are mine a bit smaller than his they sound exactly exactly the same except without the ridiculous price tag. I've always loved Sony Products and see no reason to change :)))

(0 of 1 customers found this review helpful)

 
1.0

Terrible headphones

By

from San Francisco, CA, USA

I love Sony, but I have to admit this is a terrible buy: the noise cancellation is basically inexistent. I've tried them in a train and a plane and never noticed the slightest noise reduction. Also, there's no sound pass-through: if the NC is off or once the batteries run out the headphones are rendered useless. That's the stupidest design decision ever! I got those as a gift, so I was shocked when I saw their price. I'd be really upset if I had paid my own money for it. Shame on Sony for that one, especially considering the great stuff they can come up with when they really try.

(35 of 37 customers found this review helpful)

 
1.0

big disappointment value for money

By

from Dubai

battery runs out very quick. not a great noise canceling and actually big disappointment for the money paid.

(9 of 13 customers found this review helpful)

 
3.0

Great sound - not sure about design...

By

from Topeka, KS

If you "use" these headsets your going to burn through a lot of batteries. Don't even think of letting your kids use them. Why SONY would design this product without an auto shut off feature is a crime. If your not using the headsets powered ON they sound very poor indeed. But powered ON they are great!!! Dear SONY, DITCH the SWITCH and auto sense when your plugged in. It would be a much better product if it was wireless.

(14 of 16 customers found this review helpful)

 
2.0

Cheap construction, uncomfortable

By

from Davis, CA

Earpiece fell off of headpiece after 7 months of sparse use, no rough treatment or misuse. Appeared to be held on by a screw with an inaccessible head and a piece of cheap plastic superglued onto the headpiece. Reason for sparse use was that they made my ears hurt after an hour of use, and the sound quality was horrible if the noise canceling wasn't switched on (only wanted to use it when necessary to conserve battery power!).

(7 of 9 customers found this review helpful)

 
4.0

First N.C. Headphones Ever Purchased

By

from Undisclosed

I haven't owned any other noise canceling headphones before and I have got to say these are worth every penny. I don't think I can go back to using ear buds, after using these. I've always liked sony because I believe you can never really go wrong with any of there merchandise and I see them as a really reliable source for great quality electronics & technology. I look forward to purchasing another pair. I am very satisfied with this product. Thanx Sony.

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