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MDR-IF4000
US Model
Canadian Model
AEP Model
E Model
SERVICE MANUAL
CORDLESS STEREO HEADPHONE
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-879-301-02
2005B02-1
© 2005.02
SPECIFICATIONS
Ver. 1.1 2005. 02
General
Modulation System
DQPSK-IM
Secondary carrier wave frequency
3.75 MHz
Playback frequency range
10 – 22,000 Hz
Power requirements
Rechargeable nickel-metal hydride
batteries (supplied) or commercially
available (size AAA) alkaline batteries
Mass Approx. 300 g (11 oz) (including the
supplied rechargeable nickel-metal
hydride batteries)
Supplied accessories
Rechargeable nickel-metal hydride
batteries
BP-HP550 (550 mAh min.) (2)
Operating Instructions (1)
Design and specifications are subject to change without notice.
• The MDR-IF4000 is the cordless stereo
headphones that comprises the MDR-
DS4000.
• MDR-DS4000 consists of the following models respectively.
Cordless stereo headphone MDR-IF4000
Digital surround processor DP-IF4000