Sony MDR-RF811RK User Manual Download Page 1

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How to use

Charge the headphones.

Insert the supplied rechargeable battery into the left housing of
the headphones.

Observe the correct polarity when installing battery.

Connect the A/V component using its headphone jack.

Set the volume of the A/V component as high as possible, but not so high that the audio signal becomes
distorted.

Headphone
jack (Stereo
mini jack)

TV, Digital music player, etc.

Turn on the A/V component.

Wear the headphones.

Before listening

To reduce the risk of hearing damage, first
lower the volume.

Tactile dot

Checking the included items

Transmitter TMR-RF810R (1)

Headphones MDR-RF811R (1)

AC adaptor (1)

Rechargeable nickel-metal
hydride battery BP-HP550-11 (1)

Card warranty (1)
Operating Instructions (this manual) (1)

English

Wireless Stereo Headphone System

WARNING

To reduce the risk of fire or electric shock, do not

expose this apparatus to rain or moisture.

To reduce the risk of fire or electric shock, do not expose

this apparatus to dripping or splashing, and do not place

objects filled with liquids, such as vases, on the apparatus.

Do not install the appliance in a confined space, such as a

bookcase or built-in cabinet.

As the main plug of AC power adaptor is used to

disconnect the AC power adaptor from the mains, connect

it to an easily accessible AC outlet. Should you notice an

abnormality in it, disconnect it from the AC outlet

immediately.

CAUTION

Risk of explosion if the battery is replaced by an incorrect

type.

Do not expose the batteries (battery pack or batteries

installed) to excessive heat such as sunshine, fire or the

like for a long time.

Do not subject the batteries to extreme low temperature

conditions that may result in overheating and thermal

runaway.

Do not dismantle, open or shred secondary cells or

batteries.

Do not expose cells or batteries to heat or fire. Avoid

storage in direct sunlight.

In the event of a cell leaking, do not allow the liquid to

come in contact with the skin or eyes. If contact has been

made, wash the affected area with copious amounts of

water and seek medical advice.

Do not use any charger other than that specifically

provided for use with the equipment.

Secondary cells and batteries need to be charged before

use. Always use the correct charger and refer to the

manufacturer’s instructions or equipment manual for

proper charging instructions.

After extended periods of storage, it may be necessary to

charge and discharge the cells or batteries several times

to obtain maximum performance.

Dispose of properly.

High volume may affect your hearing.

The nameplate of transmitter is located on the bottom

exterior.

The validity of the CE marking is restricted to only those

countries where it is legally enforced, mainly in the

countries EEA (European Economic Area) and Switzerland.

Hereby, Sony Corporation declares that this equipment is

in compliance with Directive 2014/53/EU.

The full text of the EU declaration of conformity is

available at the following internet address:

http://www.compliance.sony.de/

Disposal of waste batteries and
electrical and electronic equipment
(applicable in the European Union and
other countries with separate collection
systems)

This symbol on the product, the battery or

on the packaging indicates that the product and the

battery shall not be treated as household waste. On

certain batteries this symbol might be used in

combination with a chemical symbol. The chemical

symbol for lead (Pb) is added if the battery contains more

than 0.004% lead. By ensuring that these products and

batteries are disposed of correctly, you will help to prevent

potentially negative consequences for the environment

and human health which could be caused by

inappropriate waste handling. The recycling of the

materials will help to conserve natural resources. In case

of products that for safety, performance or data integrity

reasons require a permanent connection with an

incorporated battery, this battery should be replaced by

qualified service staff only. To ensure that the battery and

the electrical and electronic equipment will be treated

properly, hand over these products at end-of-life to the

appropriate collection point for the recycling of electrical

and electronic equipment. For all other batteries, please

view the section on how to remove the battery from the

product safely. Hand the battery over to the appropriate

collection point for the recycling of waste batteries. For

more detailed information about recycling of this product

or battery, please contact your local Civic Office, your

household waste disposal service or the shop where you

purchased the product or battery.

Notice for customers: the following information is only
applicable to equipment sold in countries applying EU
directives

This product has been manufactured by or on behalf of

Sony Corporation.

EU Importer: Sony Europe B.V.

Inquiries to the EU Importer or related to product

compliance in Europe should be sent to the

manufacturer’s authorized representative, Sony Belgium,

bijkantoor van Sony Europe B.V., Da Vincilaan 7-D1, 1930

Zaventem, Belgium.

This equipment has been tested and found to comply with

the limits set out in the EMC regulation using a connection

cable shorter than 3 meters.

The unit is not waterproof. If water or foreign objects enter

the unit, it may result in fire or electric shock. If water or a

foreign object enters the unit, stop use immediately and

consult your nearest Sony dealer. In particular, be careful

in the following cases.

When using the unit around a sink, etc.

Be careful that the unit does not fall into a sink or

container filled with water.

(Red)

(Off)

Complete when indicator
turns off.

After use

Take off the headphones, then turn off the power.

About sending RF signals

The transmitter starts sending RF signals automatically
when it detects an audio signal from the connected
component.

Notes

If hiss is heard, move closer to the transmitter.

You may hear some noise when you disconnect the
AC adaptor from the transmitter before turn off the
headphones.

If no signal or low signal is input
for about 4 minutes

If the transmitter does not detect an audio signal for
more than about 4 minutes, it will stop sending RF
signals, and the POWER indicator will blink for 1 minute,
and then turn off.
When the transmitter receives an audio signal again, it
starts sending the RF signals, and the POWER indicator
will light up green again.
You may not hear the beginning of the sound from the
headphones until the transmitter starts sending the RF
signals after detecting an audio signal.
RF signal transmission may stop when an extremely low
sound is input for about 4 minutes. If this happens,
raise the volume of the connected A/V component
within the range where the sound is not distorted, and
lower the volume of the headphones.

Tips for charging

Charge the headphones first

The supplied rechargeable nickel-metal hydride battery is
not charged from the first time you use them. Charge
them before use.

If the transmitter’s POWER indicator
does not light up red

Check if the switch on the left housing of the headphones
is set to OFF. If the switch is set to ON, the POWER
indicator does not light up.
You cannot charge any rechargeable battery or dry battery
other than the supplied battery.

Charging and usage time

Approx. charging time

Approx. usage time

1 hour
16 hours

45 minutes

13 hours

1) at 1 kHz, 1 mW + 1 mW output
2) hours required to fully charge an empty battery
3) Time may vary, depending on the temperature or

conditions of use.

To recharge supplied battery after
use

Connect the headphones to the CHARGE plug of the
transmitter after use. The POWER indicator lights up red,
then charging starts.
When charging is complete, there is no need to remove
the headphones from the transmitter.

Remaining battery

To check the remaining battery charge of the headphones,
turn on the switch located on the left housing of the
headphone, and check the POWER indicator located on
the left housing. The battery is still serviceable when the
indicator lights up red.
Charge the headphones if the POWER indicator light dims,
flashes, or the sound becomes distorted or noisy.

Notes

Do not connect the CHARGE plug to anything other
than these headphones.

The transmitter automatically stops sending RF signals
while charging the battery.

This system is designed to charge only the supplied
rechargeable battery type BP-HP550-11 for safety. Note
that other types of rechargeable battery cannot be
charged with this system.

If dry batteries are installed, they cannot be charged.

Do not attempt to use the supplied BP-HP550-11
rechargeable battery for other components. They are
for use with this system only.

Charge in an environmental temperature of between
0 °C and 40 °C.

Tips for volume setting

When watching videos, be careful not to raise the volume
too high in quiet scenes. You may hurt your ears when a
loud scene is played.

To set the input level

If the volume is high using the analogue input, set the ATT
(attenuator) switch to “–6 dB.”

Setting

Connected components

0 dB

TV, portable components and other
components with a low output level (initial
settings)

-6 dB

Other components

Notes

Be sure to lower the volume before setting the ATT
switch.

If audio input is distorted (sometimes, noise can be
heard at the same time), set the ATT switch to “–6 dB.”

Using the headphones
with separately-sold dry
batteries

Commercially available (LR03 (size AAA)) dry batteries can
also be used to power the headphones. Install two
batteries in the same manner as described in step 1 of
“How to use.”
When dry batteries are installed, the battery charge
function is not activated.

Battery life

Battery

Approx. usage time

Sony alkaline battery LR03
(size AAA)

28 hours

1) at 1 kHz, 1 mW + 1 mW output
2) Time may vary, depending on the temperature or

conditions of use.

Tips for better reception

Receiving performance

This system utilizes very high frequency signals in the 800
MHz band so the receiving performance may deteriorate
due to the surroundings. The following examples illustrate
conditions that may reduce the reception range or cause
interference.

Inside a building with walls containing steel beams.

An area with many steel file cabinets, etc.

An area with many electrical appliances capable of
generating electromagnetic fields.

The transmitter is placed on a metal instrument.

An area facing a roadway.

Noise or interfering signals exist in the surroundings
due to radio transceivers in trucks, etc.

Noise or interfering signals exist in the surroundings
owing to wireless communication systems installed
along roadways.

Effective area of the transmitter

The optimum distance is up to approximately 100 m
without the system picking up some interference.
However, the distance may vary depending on the
surroundings and environment.

If the system picks up some noise within the above
mentioned distance, reduce the distance between the
transmitter and the headphones, or select another
channel.

When you use the headphones inside the effective area
of the transmitter, the transmitter can be placed in any
direction from the listener.

Even within the signal reception area, there are some
spots (dead spots) where the RF signal cannot be
received. This characteristic is inherent to RF signals,
and does not indicate malfunction. By slightly moving
the transmitter, location of the dead spot can be
changed.

Replacing the earpads

The earpads are replaceable. If the earpads become dirty
or worn out, replace them as illustrated below. The
earpads are not commercially available. You can order
replacements from the store where you purchased this
system, or at your nearest Sony dealer.

Remove the old earpad by pulling it out of the groove
on the housing.

Place the new earpad on the driver unit.
Hang the edge of the earpad on one side of the driver
unit’s groove edge, then turn the edge of earpad
around the driver unit as illustrated below.
When the earpad is securely inserted into the groove,
adjust the earpad to the vertical position.

Troubleshooting

If you run into any problems using this system, use the
following checklist. Should any problem persist, consult
your nearest Sony dealer.

No sound/Low sound

Turn on the headphones.

Check the connection of the transmitter and A/V
component, AC adaptor, and AC outlet.

Check that the A/V component is turned on.

If you connect the transmitter to the headphone jack of
an A/V component, raise the volume level on the
connected A/V component within the range where the
sound is not distorted.

Change the radio frequency with the CHANNEL selector
on the transmitter, then change the radio frequency to
that of the transmitter with the channel switch on the
headphones.

Charge the supplied rechargeable battery, or replace
dry batteries with new ones. If the POWER indicator is
still off after charging, take the headphones to a Sony
dealer.

Distorted or intermittent sound
(sometimes with noise)

Use the headphones near the transmitter, or change
the position of the transmitter.

If you connect the transmitter to an A/V component
using the headphone jack, lower the volume level on
the connected A/V component within the range where
the sound is not distorted.

Change the radio frequency with the CHANNEL selector
on the transmitter, then change the radio frequency to
that of the transmitter with the channel switch on the
headphones.

Charge the supplied rechargeable battery, or replace
dry batteries with new ones. If the POWER indicator is
still off after charging, take the headphones to a Sony
dealer.

Loud background noise

If you connect the transmitter to the headphone jack of
an A/V component, raise the volume level on the
connected A/V component within the range where the
sound is not distorted.

Charge the supplied rechargeable battery, or replace
dry batteries with new ones. If the POWER indicator is
still off after charging, take the headphones to a Sony
dealer.

Use the headphones near the transmitter.

The sound cuts off

The transmitter turns off if no signal or low signal is
input for 4 minutes. If you connect the transmitter to an
A/V component using the headphone jack, raise the
volume level on the connected A/V component within
the range where the sound is not distorted.

Battery cannot be charged/
POWER indicator does not light up
red

Install the supplied rechargeable nickel-metal hydride
battery. Dry batteries and rechargeable batteries other
than the supplied cannot be charged.

Check if the switch on the left housing of the
headphones is set to OFF. If the switch is set to ON, the
POWER indicator does not light up.

Precautions

Notes on the AC adaptor

Insert the AC adaptor plug firmly.

Be sure to use the supplied AC adaptor. Using AC
adaptors with different plug polarity or other
characteristics can cause product failure.

Unified
polarity plug

Be sure to always use the supplied AC adaptor. Even AC
adaptors having the same voltage and plug polarity can
damage this product due to the current capacity or
other factors.

On power sources and placement

When this system is not to be used for a long period of
time, disconnect the AC adaptor from the AC outlet
holding the plug, and remove the battery from the
headphones to avoid damage caused by battery
leakage and subsequent corrosion.

Do not leave this system in a location subject to direct
sunlight, heat or moisture.

Avoid exposure to temperature extremes, direct
sunlight, moisture, sand, dust or mechanical shock.

Specifications

Transmitter (TMR-RF810R)

Modulation

FM stereo

Operating frequency

863.0 MHz – 865.0 MHz

Maximum output power

< 4 mW

Channel

Ch1, Ch2

Power source

DC 12 V: supplied AC adaptor

Audio input

Stereo mini plug

Dimensions

Approx. 108 mm × 128 mm × 108 mm
(w/h/d)

Mass

Approx. 137 g

Rated power consumption

3 W

Headphones (MDR-RF811R)

Frequency response

20 Hz – 20,000 Hz

Power source

Supplied rechargeable nickel-metal
hydride battery BP-HP550-11 or
commercially available (size AAA)
dry-cell batteries

Mass

Approx. 270 g (including the supplied
rechargeable nickel-metal hydride
battery)

Rated power consumption

2 W

Design and specifications are subject to change without
notice.

To AC outlet

Connect the AC
adaptor.

Insert the plug firmly.

Press and turn the lid counterclockwise.

Match the



terminals on

the battery to the



marks

in the comportment.

Press and turn the lid clockwise.

Adjust the volume.

Tactile dot

If you cannot receive a clear audio signal

First change the radio frequency with the CHANNEL selector switch
on the transmitter, then change the radio frequency to that of the
transmitter with the channel switch on the headphones.

When using the unit in the rain or snow, or in humid
locations

When using the unit while you are sweaty

If you touch the unit with wet hands, or put the unit in

the pocket of a damp article of clothing, the unit may

get wet.

Note on static electricity

Static electricity accumulated in the body may cause mild

tingling in your ears. To reduce the effect, wear clothes

made from natural materials, which suppress the

generation of static electricity.

For details on the effect of contact to the human body

from the mobile phone or other wireless devices

connected to the unit, refer to the instruction manual of

the wireless device.

This product (including accessories) has magnet(s) which

may interfere with pacemakers, programmable shunt

valves for hydrocephalus treatment, or other medical

devices. Do not place this product close to persons who

use such medical devices. Consult your doctor before

using this product if you use any such medical device.

Features

Thank you for purchasing the Sony MDR-RF811RK Wireless
Stereo Headphone System. Before operating the unit,
please read this manual thoroughly and retain it for future
reference.
Some features are:

Wireless system that allows you to listen to a
programme free from the restriction of a cord.

High fidelity sound reproduction.

13 hours of continuous use with supplied rechargeable
battery.

Easy connection with TV and HiFi Audio system
equipment.

Up to 100 metres reception range.

Volume control function on the headphones.

Wireless Stereo

Headphone System

Operating Instructions

4-529-909-

(1)

MDR-RF811RK