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4-264-473-
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Stereo Headphones
Operating Instructions
Manual de instrucciones
MDR-XB21EX
©2011 Sony Corporation Printed in Thailand
L
R
1
Earbud
Tactile dot
2
3
Sectional View
Colored parts
English
Stereo headphones
Features
Direct Vibe Structure provides an acoustically-tight seal for
superior sound isolation and deep bass sound.
Angled earbud structure for stable and comfortable fit.
4 sizes of hybrid silicone rubber earbuds for secure fit and long-
term wearing comfort (SS, S, M, L)
Durable flat cord.
Convenient carrying case supplied.
How to use
Wearing the headphones (see fig.
)
1
Determine right and left headphone and hold them as in
the illustration.
2
Fit the headphones into your ears snugly, as in the
illustration.
3
Adjust the earbud to fit snugly in your ear.
How to install the earbuds correctly
(see fig.
)
If the earbuds do not fit your ears correctly, low-bass sound may not
be heard. To enjoy better sound quality, change the earbuds to
another size, or adjust the earbuds position to sit on your ears
comfortably and fit your ears snugly.
If the earbuds do not fit your ears, try another size. Confirm the size
of the earbuds by checking color inside (see fig.
–
).
When you change the earbuds, turn to install them firmly on the
headphones to prevent the earbud from detaching and remaining in
your ear.
Earbud sizes (inside color)
Small
Large
SS
S
M
L
(Red)
(Orange)
(Green)
(Light blue)
To detach an earbud (see fig.
–
)
While holding the headphone, twist and pull the earbud off.
Tip
If the earbud slips and cannot be detached, wrap it in a dry soft cloth.
To attach an earbud (see fig.
–
)
Push the parts inside of the earbud into the headphone until the
projecting part of the headphone is fully covered.
Cleaning the earbuds
Remove the earbuds from the headphones, and wash them with a
mild detergent solution.
How to attach the clip to the cord
(see fig.
)
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.
Do not move the clip position with the cord attached. It may
damage the wires of the cord.
Specifications
Type: Closed, dynamic / Driver unit: 9 mm (CCAW adopted), dome
type / Power handling capacity: 100 mW (IEC*) / Impedance: 16 Ω at
1 kHz / Sensitivity: 103 dB/mW / Frequency response:
5 – 23,000 Hz / Cord: 1.2 m (47
1
/
4
in), Y type, flat cord / Plug: Gold-
plated L-shaped stereo mini plug / Mass: Approx. 4 g (0.14 oz)
without cord / Supplied accessories: Earbuds (SS × 2, S × 2, M × 2,
L × 2), Carrying case (1), Clip (1), Operating Instructions (1)
* IEC = International Electrotechnical Commission
Design and specifications are subject to change without notice.
Precautions
Because the headphones are of a high density enclosure, forcing
them against your ears may result in eardrum damage. Avoid using
the headphones where they are liable to be struck by people or
other objects, such as a ball, etc.
Pressing the headphones against your ears may produce a
diaphragm click sound. This is not a malfunction.
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.
The earbuds may deteriorate due to long-term storage or use.
Install the earbuds firmly onto the headphones. If an earbud
accidentally detaches and is left in your ear, it may cause injury.
Do not leave the stereo headphones in a location subject to direct
sunlight, heat or moisture.
Note on static electricity
In particularly dry air conditions, mild tingling may be felt on your
ears. This is a result of static electricity accumulated in the body, and
not a malfunction of the headphones.
The effect can be minimized by wearing clothes made from natural
materials.
EP-EX10A is available (sold separately) as optional replacement
earbuds.
EP-EX10A offers 4 types of the earbuds: SS, S, M and L.
