3

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Welcome!

Thank you for purchasing the Sony
MDR-IF140K Cordless Stereo
Headphone System. Before operating
the unit, please read this manual
thoroughly and retain it for future
reference.

The MDR-IF140K is a cordless stereo
headphone system using infrared
transmission. You can enjoy listening to
a program free from the restriction of
the headphone cord by simply
connecting the transmitter to a TV, or
audio components equipped with a
headphone jack or a line output jack.

• Cordless, noiseless infrared headphone

system resistant to external noise, etc.

• Wide infrared reception range of up to 7m

(23 ft.).

• Self-adjusting headband mechanism

eliminating the need for headband
adjustment.

• Single VOL control adjusts both the right

and left volume of the headphones.

Table of contents

Getting started

Unpacking ........................................... 4
Inserting the battery .......................... 5
Setting up the transmitter ................. 6

Operating the system

Listening to a program ...................... 8
The effective area of the

transmitter ..................................... 10

Replacing the ear pads .................... 10

Additional information

Specifications .................................... 11
Precautions ....................................... 12
Troubleshooting ............................... 13

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