Sony made the MDR-AS20J sport-style headphones for active use. The loop-shaped ear hangers comfortably fit over a wide range of ear sizes, and keep the earbuds in place even during intense workouts. A four-foot cord gives you plenty of room to move around, while the included clip secures the cord to your clothing. The low-impedance design features 13mm drivers for high-energy sound with virtually any portable audio player.

Product Highlights:

  • earbud headphones with soft loop ear hangers
  • 4-foot cord with cord clip and gold-plated stereo mini plug
  • 13mm dome drivers with neodymium magnets
  • frequency response: 18-22,000 Hz
  • impedance: 16-ohms
  • weight: 0.43 oz
  • warranty: 90 days
  • Our 60-day money-back guarantee

Sony MDR-AS20J Reviews

Average Customer Review:

2 reviews
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Not sweatproof!!!!

Written By RichR, NY, NY on Tuesday, September 20, 2011

I thought I found the perfect workout/running headphones, and was thrilled at first. Super-secure, and still let some acceptable amount of sound in which is much safer when running outside. But I quickly learned that they are not sweatproof at all. First pair last about a week and then one ear went. Returned them and the second pair lasted a week and a half. I really wanted them to work, so I tried one more time, and the same thing happened. They seem to short out from sweat.

Sony MDR-AS20J

Written By TOM, ATLANTA on Wednesday, April 20, 2011

Crutchfield Customer Review (What's this?)

The ear phones work well and I'm thrilled that I don't have to stick them inside
my ears.

Hands-on research

What's in the box?

Download owner's manual

  • Earbud-style headphones with attached 49" cord terminated by a male right-angle 3.5mm connector
  • Cord clip
  • Operating Instructions

Features and Specs

Fit Style In-ear/Earbud
Earcup Type ---
Noise-canceling No
Bluetooth No
Frequency Response 18-22,000 Hz
Sensitivity 104 dB
Impedance 16 Ohms
Weight 0.43 ounces
Cord Length 49"
Airline Adapter Included No
iPod Control No
Volume Control No
Built-in Microphone No
Parts Warranty 90 Days
Labor Warranty 90 Days

Product Research


Design: The lightweight, weather-resistant, in-the-ear active style MDR-AS20J headphones feature soft loop hangers that fit comfortably over your ear and allow you to be active without fear of unexpected earbud drop-out. There is also a cord clip to attach the headphone's cord to your clothing.

Drivers: The MDR-AS20J features 13mm dome-type drivers which deliver rich sound with deep bass.

Cord: The MDR-AS20J feature an attached 49" cord terminated by a right-angle male 3.5mm minijack connector.

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