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Specifications
General
Carrier frequency
863.5 – 864.5 MHz
Channel Ch1, Ch2, Ch3
Modulation FM stereo
Frequency response
18 – 22,000 Hz
Transmitter TMR-RF875R
Power source DC 9 V: supplied AC power
adaptor
Audio input phono jacks/stereo mini jack
Dimensions Approx. 130 × 135 × 150 mm
(5
1
/4 × 5
3
/8 × 6 in.) (w/h/d)
Mass Approx. 200 g (7 oz.)
Headphones MDR-RF875R
Power source DC 2.4 V: Built-in rechargeable
battery
Mass Approx. 350 g (12.3 oz.) incl.
built-in rechargeable battery
Built-in Ni-MH rechargeable battery
Model name NH-AAC
Voltage 1.2 V
Capacity 1,000 mAh
Optional accessory
Plug adaptor PC-236HG (stereo mini jack y
monaural mini plug)
Design and specifications are subject to change without
notice.
Problem
Distortion
Loud
background
noise
Solution
If the transmitter is
connected to a headphone jack, turn
down the volume of the connected
audio/video equipment.
Change the radio frequency with the
CHANNEL selector on the
transmitter.
The headphones’ POWER indicator
light is weak or turned off.
•Charge the built-in rechargeable
battery or if the POWER indicator is
still off after charging the built-in
rechargeable battery, take the
headphones to a Sony dealer for
replacement of the rechargeable
battery.
If you connect the transmitter to LINE
OUT or REC OUT jack of an audio
reproducer, make sure that the NOISE
FILTER switch is set to OFF.
Move closer to the transmitter. As
you move away from the transmitter,
more noise is likely to be heard.
If the transmitter is connected to a
headphone jack, turn up the volume
of the connected audio/video
equipment.
Change the radio frequency with the
CHANNEL selector on the
transmitter, then press the TUNING
button again.
The headphones’ POWER indicator
light is weak or turned off.
•Charge the built-in rechargeable
battery or if the POWER indicator is
still off after charging the built-in
rechargeable battery, take the
headphones to a Sony dealer for
replacement of the rechargeable
battery.
If you connect the transmitter to the
LINE OUT or REC OUT jack of an
audio reproducer, make sure that the
NOISE FILTER switch is set to OFF.