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Stereo Headphones

3-289-424-

13

(1)

Operating Instructions
Manual de instrucciones

© 2008  Sony Corporation     Printed in Thailand

MDR-AS20J

English

Features

• Lightweight clip-on style headphones for active use
• Unique loop hangers provide secure fit around the ear to prevent

dropping during sports or workout activity

• Water-resistant design

How to use (see fig. 

A

)

1

Hook the 

L

 part to your left ear and the 

R

 part to your right ear as

illustrated.

2

Adjust the earpieces to comfortably fit your ears.

After you use the headphones, keep them with the cord slider high
positioned to avoid entangling the cord.

How to re-attach the cord to the clip (see fig. 

B

)

1

Hold the clip closed, and pull up the lever on the clip just a little.

2

Put the cord into the groove under the lever.

Notes

• If you pull up the lever on the clip without holding the clip closed, or

holding the clip closed but opening the lever too much, you cannot put
the cord into the groove under the lever.

• Do not catch the cord on the projection of the clip or do not wedge it into

the groove. It may damage the wires of the cord.

Specifications

Type: Open air, dynamic / Driver units: 13.5 mm, dome type / Power
handling capacity: 50 mW (IEC*) / Impedance: 16 

 at 1 kHz / Sensitivity:

104 dB/mW / Frequency response: 18 - 22,000 Hz / Cord: Approx. 1.22 m
(48 

1

/

8

 in) / Plug: Stereo mini plug / Mass: Approx. 12 g (0.43 oz) without

cord / Supplied accessory: Clip (1)
* IEC = International Electrotechnical Commission
Design and specifications are subject to change without notice.

Precautions

• Listening with headphones at high volume may affect your hearing. For

traffic safety, do not use while driving or cycling.

• Do not put weight or pressure on the headphones as it may cause the

headphones to deform during long storage.

Cord slider

A

b

B

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