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The Sony MDR-AS40EX are earbud style headphones from Sony's Sports and Active Style line.

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ear cushions are very comfortable, don't hurt the ear canal

2 agree

2 ft cord with 2 ft extension enables armband MP3 players or to pop it in your pocket, nice versatility

1 agrees

plenty of bass production when using the right sized ear tips, good definition

1 agrees

sound performance is solid, good distortion-free clarity

1 agrees

over-ear clips keep them in place, perfect for running

1 agrees

highs are crisp and fairly resonant, avoid sounding tinny

1 agrees

cord clip and carrying case are nice extras for keeping the earphones safe

1 agrees
  • Only 3 words are allowed.

frequent problems within the first year of one or both ear pieces just not working anymore

1 agrees
  • Only 3 words are allowed.


The Sony MDR-AS40EX are earbud style headphones from Sony's Sports and Active Style line.  The headphones are designed with soft ear hangers that can be used to prevent the earbud from falling off the ear or detached so that the headphones can be used as traditional earbuds.  They feature Neodymium magnets to deliver powerful bass performance and a moisture guard system which allows for moisture to pass around the headphones.  The MDR-AS40EX have a 2 ft cord with an in-line cord clip which makes it possible to use them with an arm-band as well as a 2 ft extension cord.  They are very lightweight, at only 6 grams (excluding the cord), and come with 3 sizes of detachable hangers, 3 sizes of earbuds, and a hard carrying case.  The MDR-AS40EX are more versatile in comparison with Sony's MDR-AS20J since they offer a more adjustable fit due to the additional accessories they come with. 

  • 9 mm driver units
  • Neodymium magnets
  • Hanger design prevents falling off ear
  • Moisture guard
  • Comes with 3 sizes of detachable soft hangers
  • Comes with hard carrying case
  • Comes with 3 sizes of earbuds
  • In-line cord clip
  • Gold plated straight stereo plug
  • Frequency response: 10Hz - 22kHz
  • Weight: 6 g (without cord)
  • 2 ft cord for arm-band use + 2 ft extension cord
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