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Sony MDRAS20J (MDR-AS20J) Active-Style Around Ear-Clip Sports Headphones - Black/Silver

Sport Clip-On Headphones with Loop Hangers and Cord Clips (YMDRAS20J)


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This item has been discontinued

But you may be interested in the newest model that's available.

dras22ip thumbnail

Sony DR-AS22IP (DRAS22iP) Active-Style Sports Ear-Clip Headphones With iPod Remote

OUR PRICE: $29.99

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Product Features:
  • Sony Sport Clip-On Headphones
  • Loop hangers prevent dropping off the ear
  • Fit a wide range of ear sizes
  • Soft loop hangers for comfortable fitting
  • Lightweight, clip-on style (vertical in the ear)
  • High quality construction
  • Ideal for sports and workout use
  • Double support for secure fit
  • Water-resistant design
  • Also Available in: White
  • 90-Day Manufacturer's warranty
Product Specifications:
  • Design: Earbud
  • Magnet: Neodymium for outstanding bass performance
  • Plug: Gold Plated, straight stereo mini plug
  • Type of Use: Sports
  • Diaphragm: PET
  • Type: Open air, Dynamic
  • Power Handling Capacity: 50mW (IEC)
  • Driver Unit: 13.5mm diameter, dome type
  • Frequency Response: 18-22,000Hz
  • Impedance: 16 ohms at 1kHz
  • Sensitivity (db): 104dB/mW
  • Cord Length (Approx.): 2ft single sided, 2ft extension cord also supplied
  • Weight (Approx.): .46 Oz. (13g) Without cord
  • 90-day Manufacturer's warranty
Package Contains:
  1. Sony MDR-AS20J Headphones
  2. Extension Cord
  3. Clip for securing the cord

Product History:

Sony MDR-AS200/BLK thumbnail
(newest, current model)
Sony DR-AS22IP thumbnail
(previous model, replaced by Sony MDR-AS200/BLK Earbuds Active Sports In-Ear Headphones (Black))
Sony MDR-AS20J thumbnail
(previous model, replaced by Sony DR-AS22IP (DRAS22iP) Active-Style Sports Ear-Clip Headphones With iPod Remote)
Sony MDR-J10/BLACK thumbnail
(previous model, replaced by Sony MDRAS20J (MDR-AS20J) Active-Style Around Ear-Clip Sports Headphones - Black/Silver)

Headphone Design

Headphone Type

Headphone type refers to the construction of the headphones.

Around the Ear means that the headphones wrap around the ear to provide a secure fit. This is most often seen in active and sports headphones.

Around the Neck means that the headphones wrap around the neck. This is also seen in active and sports headphones.

Earbuds means that the right and left sides of the headphones are separated and will fit securely into the ear. These are small, compact, and user friendly.

Over the Head headphones mean that the right and left speakers are connected with a support that goes over the head and rests on top. This is the typical headphone type.

Around the Ear
Earpiece Design

This is the design of the earpieces on the headphones. Some headphones go inside the ear, while others rest on the outside of the ear. This helps you know exactly what type of headphones you will be receiving.

In-Ear: The ear buds go into the ear. Most often, the right and left ear buds are two separate pieces.

Enclosed-Ear: Usually are found on the larger headphones. They rest on top of the ear and have padding for comfort, as well as enclosing the ear to the speaker. This type of headphone helps to filter out surrounding noise.

On-Ear: This type of headphone involves the speaker sitting gently on the ear without going in the ear or sealing it off.

Specifically For
Some headphones can use an IR Transmitter in your vehicle, while some can be plugged into your media device and be used on the go or at home.
Acoustic Principle
The basic design of the headphones. There are 3 different types: Open: Have ports that allow air through the back of the diaphragms, enabling the headphones to sound like the music is coming from an outside source. Closed: Completely sealed and have no air passing through the diaphragms. Sounds like you are in a closed off room. Semi-open: Have slots or ports in the back of the cup and are partially open. This allows for a mixed sound between an open and closed headphone.

General Features

Noise Reduction technology removes unwanted noise from a signal. Background or ambient noise can be removed to produce clearer speech and enhanced hearing. Typically these Active Noise Canceling (ANC) headphones are powered and use batteries to activate the noise canceling technology. Also referred to as Noise Reduction or Noise Cancellation.
Headphone Connection
This is how the headphones connect to the audio source.

Corded means that the headphones use a cord to transfer the audio signal.

Wireless means that the audio signal is transmitted wirelessly to the headphones.

1/4" Stereo Jack Adapter
Some headphones will come with a 1/4" stereo jack adapter to connect the usual 3.5mm jack to a 1/4" stereo plug.

1/4" Stereo jack is a larger audio jack that select electronics have.

Volume Adjustment
Volume Adjustment means that the headphone (independent of the source) can adjust the playback volume. Many headphones and ear buds have in-line volume control, which allows adjusting the audible volume from a switch on the headphones cord. Other headphones have a volume knob on the headphone can.
Built-In Microphone
This means that the headphones or earbuds have a built-in microphone. This can be a microphone on the cord, built into the headphone, or even a boom microphone. These mics can be used for music devices like iPods, for Smartphones to make and receive calls, or for gaming purposes.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
18 - 22,000 Hz
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
104 dB
Driver Size
This refers to the diameter of the driver (speaker) on each side of the headphone.
Driver Type
The physical design of the driver in the headphones.
The opposition to electric current, a higher impedance means a higher electrical resistance. This is measured in ohms.
16 ohms
Primary Color
This is the main color of the item.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


O'Fallon, MO

great for listening while you work hard or play hard

September 17, 2013

I've bought many different styles of headphones looking for one that would stay put while I work. Some of my recent tasks include installing vinyl siding, running a sod cutter to prep for a patio block walkway, gardening, cleaning the house, and working out. They have stayed on thu all that and allowed me to listen while I work. They're so comfortable that I leave them on when I take a lunch break. I use them at work and when I run errands. I use them for my iPhone and also to listen to CDs from the library. They're perfect. I'm often working in the hot sun and so far the sweat has not caused any problems. I've been so happy with them that I bought three sets so I can keep one at work, one in my car, and one with my tools. The only thing frustrating about these headphones is when I can't find them. I've caught my son swiping them a few times. He's the music-lover in the family so apparently they have good sound qualities. I definitely recommend these.

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Denver, CO

My favorite

August 30, 2013

I really like these headphones. They fit my ears so much better than anything I've ever purchased though Apple and they're cheap enough that I can use them hard and then get a new pair. They last a long time too.

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Sony MDRAS20J (MDR-AS20J) Active-Style Around Ear-Clip Sports Headphones - Black/Silver