Pioneer A-20 User Manual

Operating Instructions
Mode d’emploi

Integrated Amplifier
Amplificateur Intégré

IMPORTANT

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient
magnitude to constitute a risk of electric
shock to persons.

WARNING

This equipment is not waterproof. To prevent a fire or
shock hazard, do not place any container filled with
liquid near this equipment (such as a vase or flower
pot) or expose it to dripping, splashing, rain or
moisture.

WARNING

Before plugging in for the first time, read the following
section carefully.

The voltage of the available power supply differs
according to country or region. Be sure that the
power supply voltage of the area where this unit
will be used meets the required voltage (e.g., 230 V
or 120 V) written on the rear panel.

CAUTION:

TO PREVENT THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR
BACK). NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.

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The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.

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WARNING

To prevent a fire hazard, do not place any naked flame
sources (such as a lighted candle) on the equipment.

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VENTILATION CAUTION

When installing this unit, make sure to leave space
around the unit for ventilation to improve heat radiation
(at least 30 cm at top, 10 cm at rear, and 10 cm at each
side).

WARNING

Slots and openings in the cabinet are provided for
ventilation to ensure reliable operation of the product,
and to protect it from overheating. To prevent fire
hazard, the openings should never be blocked or
covered with items (such as newspapers, table-cloths,
curtains) or by operating the equipment on thick carpet
or a bed.

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Operating Environment

Operating environment temperature and humidity:
+5 °C to +35 °C (+41 °F to +95 °F); less than 85 %RH
(cooling vents not blocked)
Do not install this unit in a poorly ventilated area, or in
locations exposed to high humidity or direct sunlight (or
strong artificial light)

D3-4-2-1-7c*_A1_En

If the AC plug of this unit does not match the AC
outlet you want to use, the plug must be removed
and appropriate one fitted. Replacement and
mounting of an AC plug on the power supply cord of
this unit should be performed only by qualified
service personnel. If connected to an AC outlet, the
cut-off plug can cause severe electrical shock. Make
sure it is properly disposed of after removal.
The equipment should be disconnected by removing
the mains plug from the wall socket when left unused
for a long period of time (for example, when on
vacation).

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CAUTION

The /I STANDBY/ON switch on this unit will not
completely shut off all power from the AC outlet.
Since the power cord serves as the main disconnect
device for the unit, you will need to unplug it from the
AC outlet to shut down all power. Therefore, make
sure the unit has been installed so that the power
cord can be easily unplugged from the AC outlet in
case of an accident. To avoid fire hazard, the power
cord should also be unplugged from the AC outlet
when left unused for a long period of time (for
example, when on vacation).

D3-4-2-2-2a*_A1_En

This product is for general household purposes. Any
failure due to use for other than household purposes
(such as long-term use for business purposes in a
restaurant or use in a car or ship) and which requires
repair will be charged for even during the warranty
period.

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POWER-CORD CAUTION

Handle the power cord by the plug. Do not pull out the
plug by tugging the cord and never touch the power
cord when your hands are wet as this could cause a
short circuit or electric shock. Do not place the unit, a
piece of furniture, etc., on the power cord, or pinch the
cord. Never make a knot in the cord or tie it with other
cords. The power cords should be routed such that they
are not likely to be stepped on. A damaged power cord
can cause a fire or give you an electrical shock. Check
the power cord once in a while. When you find it
damaged, ask your nearest PIONEER authorized
service center or your dealer for a replacement.

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The Safety of Your Ears is in Your Hands

Get the most out of your equipment by playing it at a
safe level – a level that lets the sound come through
clearly without annoying blaring or distortion and, most
importantly, without affecting your sensitive hearing.
Sound can be deceiving. Over time, your hearing
“comfort level” adapts to higher volumes of sound, so
what sounds “normal” can actually be loud and
harmful to your hearing. Guard against this by setting
your equipment at a safe level BEFORE your hearing
adapts.

ESTABLISH A SAFE LEVEL:

• Set your volume control at a low setting.

• Slowly increase the sound until you can hear it
comfortably and clearly, without distortion.

• Once you have established a comfortable sound
level, set the dial and leave it there.

BE SURE TO OBSERVE THE FOLLOWING
GUIDELINES:

• Do not turn up the volume so high that you can’t
hear what’s around you.

• Use caution or temporarily discontinue use in
potentially hazardous situations.

• Do not use headphones while operating a motorized
vehicle; the use of headphones may create a traffic
hazard and is illegal in many areas.

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This product contains mercury. Disposal of this
material may be regulated due to environmental
considerations. For disposal or recycling information,
please contact your local authorities or the Electronics
Industries Alliance : www.eiae.org.

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IMPORTANT NOTICE

THE MODEL NUMBER AND SERIAL NUMBER OF
THIS EQUIPMENT ARE ON THE REAR OR BOTTOM.
RECORD THESE NUMBERS ON YOUR ENCLOSED
WARRANTY CARD AND KEEP IN A SAFE PLACE
FOR FUTURE REFERENCE.

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Information to User

Alterations or modifications carried out without
appropriate authorization may invalidate the user’s
right to operate the equipment.

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WARNING: Handling the cord on this product or

cords associated with accessories sold with the
product may expose you to chemicals listed on
proposition 65 known to the State of California and
other governmental entities to cause cancer and
birth defect or other reproductive harm.

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Caution

To prevent fire hazard, the Class 1 Wiring Cable
should be used for connection with speaker, and
should be routed away from hazards to avoid damage
to the insulation of the cable.

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CAUTION

This product satisfies FCC regulations when shielded
cables and connectors are used to connect the unit
to other equipment. To prevent electromagnetic
interference with electric appliances such as radios
and televisions, use shielded cables and connectors
for connections.

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FEDERAL COMMUNICATIONS COMMISSION DECLARATION OF CONFORMITY

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
Product Name: Integrated Amplifier
Model Number: A-20
Responsible Party Name: PIONEER ELECTRONICS (USA) INC.
SERVICE SUPPORT DIVISION
Address: 1925 E. DOMINGUEZ ST. LONG BEACH, CA 90810-1003, U.S.A.
Phone: [phone]
URL: http://www.pioneerelectronics.com

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This Class B digital apparatus complies with
Canadian ICES-003.

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11)

Read these instructions.

1)
Keep these instructions.

2)
Heed all warnings.

3)
Follow all instructions.

4)
Do not use this apparatus near water.

5)
Clean only with dry cloth.

6)
Do not block any ventilation openings. Install in

7)

Only use attachments/accessories specified by
the manufacturer.

12)

Use only with the cart, stand, tripod, bracket, or
table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to

avoid injury from tip-over.
accordance with the manufacturer’s
instructions.
Do not install near any heat sources such as

8)
radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce
heat.
Do not defeat the safety purpose of the polarized

9)
or grounding-type plug. A polarized plug has two
blades with one wider than the other. A
grounding type plug has two blades and a third
grounding prong. The wide blade or the third
prong are provided for your safety. If the provided
plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.
Protect the power cord from being walked on or

10)
pinched particularly at plugs, convenience

13)

Unplug this apparatus during lightning storms
or when unused for long periods of time.

14)

Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has
been damaged in any way, such as power-supply
cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture,

does not operate normally, or has been dropped.
receptacles, and the point where they exit from
the apparatus.

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NOTE:

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.

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Thank you for buying this Pioneer
product.

Please read through these operating instructions so that
you will know how to operate your model properly. After
you have finished reading the instructions, put them in a
safe place for future reference.

Contents

01 Before you start

What’s in the box. . . . . . . . . . . . . . . . . . . . . . . . . .5

Loading the batteries in the remote control . . . . . .5

Using the remote control. . . . . . . . . . . . . . . . . . . . .5

Installing the amplifier . . . . . . . . . . . . . . . . . . . . . . 5

02 Connecting up

Making cable connections. . . . . . . . . . . . . . . . . . .6

About “Bi-wiring” . . . . . . . . . . . . . . . . . . . . . . . . . .6

Connecting speaker cables . . . . . . . . . . . . . . . . . . 7

Connecting audio cables . . . . . . . . . . . . . . . . . . . .7

Using centralized control with other Pioneer

components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Plugging in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

03 Controls and displays

Front panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Remote control . . . . . . . . . . . . . . . . . . . . . . . . . .10

04 Operation

Playback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Set the power to Standby. . . . . . . . . . . . . . . . . . . .11

Making an audio recording . . . . . . . . . . . . . . . . .12

To set for automatic standby status

(Auto Power Down) . . . . . . . . . . . . . . . . . . . . . . .12

Restoring all the settings to the factory default

settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

05 Additional information

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 13

Cleaning the unit . . . . . . . . . . . . . . . . . . . . . . . . .13

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .14

4

Before you start 01

7 m

30 °

30 °

Chapter 1:

Before you start

What’s in the box

Please confirm that the following accessories are in the
box when you open it.

• Remote control

• AAA/IEC R03 dry cell batteries x2

• Operating instructions (This document)

Note

• Illustrations featured in the Operating Instructions
may have been modified or simplified for ease of
explanation, and may therefore differ from the
actual product appearance.

Loading the batteries in the remote
control

1 Open the rear lid.

2 Insert the new batteries, matching the
polarities as indicated inside the case.

3 Close the rear lid.

The batteries included with the unit have been provided
to allow you check product operation and may not last
long. We recommend using alkaline batteries that have
a longer life.

WARNING

• Do not use or store batteries in direct sunlight or
other excessively hot place, such as inside a car or
near a heater. This can cause batteries to leak,
overheat, explode or catch fire. It can also reduce
the life or performance of batteries.

Caution

Incorrect use of batteries may result in such hazards as
leakage and bursting. Observe the following
precautions:

• When inserting the batteries, make sure not to
damage the springs on the battery’s  terminals.

• Do not use any batteries other than the ones
specified. Also, do not use a new battery together
with an old one.

• When loading the batteries into the remote control,
set them in the proper direction, as indicated by the
polarity marks ( and ).

• Do not heat batteries, disassemble them, or throw
them into flames or water.

• Batteries may have different voltages, even if they
are the same size and shape. Do not use different
types of batteries together.

• To prevent leakage of battery fluid, remove the
batteries if you do not plan to use the remote
control for a long period of time (1 month or more).
If the fluid should leak, wipe it carefully off the
inside of the case, then insert new batteries. If a
battery should leak and the fluid should get on your
skin, flush it off with large quantities of water.

• When disposing of used batteries, please comply
with governmental regulations or environmental
public institution’s rules that apply in your country/
area.

Using the remote control

The remote has a range of about 7 m at an angle of about
30º from the remote sensor.

Keep in mind the following when using the remote
control:

• Make sure that there are no obstacles between the
remote and the remote sensor on the unit.

• Remote operation may become unreliable if strong
sunlight or fluorescent light is shining on the unit’s
remote sensor.

• Remote controllers for different devices can
interfere with each other. Avoid using remotes for
other equipment located close to this unit.

• Replace the batteries when you notice a fall off in
the operating range of the remote.

Installing the amplifier

When installing this unit, make sure to put it on a level
and stable surface.

• Don’t install it on the following places:
– on a color TV (the screen may distort)
– near a cassette deck (or close to a device that
gives off a magnetic field). This may interfere with
the sound.
– in direct sunlight
– in damp or wet areas

– in extremely hot or cold areas
– in places where there is vibration or other
movement
– in places that are very dusty
– in places that have hot fumes or oils (such as a
kitchen)

• Do not mount the unit on a sofa or other object or
material with absorbent qualities, since sound
quality may be adversely affected.

English

DeutschFrançais

Italiano Español Русский

Nederlands

5

En

02 Connecting up

REC

R

L

OUTPUT

R

L

PLAY

RL

AUDIO

OUTPUT

LRLRL

R

L

R

LRL

R

L

R

L

R

L

R

LRL

R

L

R

L

R

MENU

iPod





Music>
Extras>
Settings>

Shuffle Songs

Backlight

SACD/CD player

Network audio player

Speaker system B

Speaker system A

Turntable

Tuner

iPod dock, etc

CD recorder or

tape deck

Right

Left

Right

Left

Power cord

This unit’s rear panel

Speaker system

Left

Speaker system

Right

This unit’s
rear panel

Remove the shorting

bar between the +

and – terminals.

Chapter 2:

Connecting up

Making cable connections

Caution

• Before making or changing the connections, switch off the power and disconnect the power cord from the AC
outlet.

• Connect the power cord after all the connections between devices have been completed.

Caution

•The SIGNAL GND terminal is provided to reduce
noise when connecting the unit to components
such as an analog turntable.

• Do not connect the PHONO (MM) terminals to any
component other than a turntable; also, do not
connect to a turntable equipped with built-in
equalizer. An excessively high sound output may be
produced, resulting in damage to your speakers or
other devices.

• The unit’s PHONO (MM) terminals are designed to
be used with turntables equipped with MM
(moving-magnet) type cartridges. Turntables
equipped with MC (moving-coil) cartridges cannot
be used.

• Make sure not to bend the cables over the top of
this unit (as shown in the illustration). If this
happens, the magnetic field produced by the
transformers in this unit may cause a humming
noise from the speakers.

• If your turntable has a grounding wire, secure it to
the ground terminal on this amplifier.

Note

• When connecting a tape cassette deck, playback
noise may be heard, depending on the installation
location. This noise is caused by leakage flux from
the amplifier’s transformer. In this event, change
the installation location, or move the deck farther
from the amplifier.

• iPod is a trademark of Apple Inc., registered in the
U.S. and other countries.

About “Bi-wiring”

This unit can be used with speakers that support bi­wiring. Be sure to connect the high-frequency and
low-frequency connections correctly.

• During playback, be sure that both the SPEAKERS
A button and SPEAKERS B button are set to ON
(page 8).

HIGH

LOW

HIGH

LOW

Caution

• When using bi-wiring to connect speakers, avoid
adverse affects on the amplifier by being sure to
remove the HIGH and LOW short bars provided with
the speakers. For detailed information, consult the
instructions provided with the speakers.

• When using speakers with removable network
circuits, note that if the network is removed, no
effect will be produced and damage may be caused
to the speaker.

• Another method of connection is to connect the

SPEAKERS A terminals to HIGH and the SPEAKERS
B terminals to LOW (reverse that shown in the

illustration).

6

En

Connecting up 02

10 mm

Left (white)

Right (red)

Other Pioneer
component equipped
with CONTROL IN/
OUT jacks

To other Pioneer
component
equipped with
CONTROL IN jack

Aim remote control
at the sensor on the
A-20.

A-20
remote
control

A-20

To AC outlet

Power cord

This unit’s rear panel

English

Connecting speaker cables

1 Twist the cable cores.

2 Loosen the nut on the
terminal, and insert the speaker cable into
the exposed hole in the terminal shaft.

3 Retighten the terminal nut.

123

• If you want to use speaker cables terminated with
banana plugs, screw the speaker terminal fully
shut, then plug the banana plug into the end of the
speaker terminal.

Caution

• When using only one set of speaker terminals
(SPEAKERS A or SPEAKERS B), or when utilizing
bi-wiring connections, the speaker used should
have a nominal impedance between 4 Ω and
16 Ω. When using both sets of terminals, the
connected speakers should have nominal
impedance between 8 Ω and 32 Ω. Consult the
instructions accompanying your speakers for
details regarding the impedance value.

• Make sure the positive and negative (+/–) terminals
on the amplifier match those on the speakers.

• These speaker terminals carry HAZARDOUS live
voltage. To prevent the risk of electric shock when
connecting or disconnecting the speaker cables,
disconnect the power cord before touching any
uninsulated parts.

• Make sure that all the bare speaker wire is twisted
together and inserted fully into the speaker
terminal. If any of the bare speaker wire touches the
back panel it may cause the power to cut off as a
safety measure.

SPEAKERS

Connecting audio cables

Connect the white plug to the left (L) jack, and the red
plug to the right (R) jack. Be sure to insert the plugs fully
into the jacks.

Using centralized control with other
Pioneer components

Multiple Pioneer components equipped with CONTROL
IN/OUT jacks can be connected to the A-20 unit,

allowing centralized control of the components via the
remote sensor on the A-20. This also allows remote
control of components not equipped with a remote
sensor, or installed in places where the component’s
remote sensor cannot be accessed.

IN

OUT

CONTROL

Plugging in

Important

• When going on a trip or otherwise not using the
unit for an extended period, always disconnect the
power cord from its outlet. Note that various
internal settings will not be lost even if the power
cord is disconnected from its outlet for an extended
time.

• If it is necessary to detach the power cord, first be
sure to press the 
front panel of the unit so the A-20 is turned OFF.

After you’ve finished making all connections, plug the
unit into an AC outlet.

/I

STANDBY/ON button on the

DeutschFrançais

Italiano Español Русский

Nederlands

7

En

Note

• For connections use a commercially available
monaural miniplug cord (without resistor).

• When connecting the CONTROL IN/OUT jacks,
commercially available audio cords must also be
used to make analog connections. Merely
connecting the CONTROL IN/OUT jacks alone will
not allow proper system control.

• When a control cord is connected to the A-20’s
CONTROL IN jack, the unit cannot be controlled by
pointing the remote control at the A-20 (the remote
sensor is automatically disabled).

1 Plug the power cord into an AC outlet.

03 Controls and displays

Chapter 3:

Controls and displays

Front panel

1

2 54

3

6

1/I

STANDBY/ON

Switches the amplifier between off and on.
When power is turned on, the power indicator in the
center of the button will light.

2

STANDBY/APD

When power is set to standby, the indicator lights red.
When the Auto Power Down (APD) function is on, the
indicator lights green (page 12).

3

SPEAKERS A

Use this button to listen to the speaker system
connected to SPEAKERS A terminals.

On : The indicator lights. Sound is heard from the
speaker system. (Sound will also be produced from the

PHONES jack.)
Off : The indicator goes off. No sound is heard from the

speaker system. Set to this position when listening with
headphones.

4

SPEAKERS B

Use this button to listen to the speaker system
connected to SPEAKERS B terminals.

On : The indicator lights. Sound is heard from the
speaker system. (Sound will also be produced from the

PHONES jack.)
Off : The indicator goes off. No sound is heard from the

speaker system. Set to this position when listening with
headphones.

7

9

8

indicator

button/indicator

button/indicator

10 11 12

5

LOUDNESS

Use when listening at low volume levels.
On : The indicator lights: Boosts low and high

frequencies to give added punch to playback even at a
low volume level.

Off : The indicator goes off: Should normally be left in
this position.

• This button does not operate when the DIRECT
button is in the on position.

• When sound volume is raised, the amount of
change produced by the LOUDNESS circuit is
reduced.

13

button/indicator

6 Remote sensor

Receives the signals from the remote control (page 5).

7

PHONES

Use to connect headphones. No sound is produced
when the POWER AMP DIRECT button is ON.

8 DIRECT button/indicator

On : The indicator lights: When this button is set to ON,

sound signals are output directly, without being passed
through the various adjustment circuits (BASS, TREBLE,
BALANCE, LOUDNESS). This allows reproduction of the
signals with greater fidelity, but it disables any settings
made with the BASS, TREBLE, BALANCE or LOUDNESS
controls.

Off : The indicator goes off: The signal passes through
the various frequency adjusting circuits. When the
indicator is OFF, adjustments can be made with the

BASS, TREBLE, BALANCE, and LOUDNESS controls.

9

BASS

Use to adjust the low-frequency tone. The center position
is the flat (normal) position. When turned to the right,
low-frequency tones are emphasized; when turned to the
left, low-frequency tones are de-emphasized.

• This button does not operate when the DIRECT
button is in the on position.

10

TREBLE

Use to adjust the high-frequency tone. The center
position is the flat (normal) position. When turned to the
right, high-frequency tones are emphasized; when
turned to the left, high-frequency tones are de­emphasized.

• This button does not operate when the DIRECT
button is in the on position.

11

BALANCE

Should normally be left in the center position. Adjust
balance if the sound is louder from one of the speakers.
If the right side is louder, turn toward the L (left) position
and if the left side is louder, turn toward the R (right)
position.

• This button does not operate when the DIRECT
button is in the on position.

12 VOLUME control

Use to adjust the volume level. (Also allows adjustment
of the headphone sound volume.)

jack

tone control

tone control

control

13

INPUT SELECTOR

Turn the knob clockwise or counterclockwise so that the
indicator lights for your desired input source. Turning
the knob clockwise causes the lit indicator to right.
Turning counterclockwise causes it to left. When the
remote control’s MUTE button is pressed to mute the
sound, the indicator for the input source selected with
the INPUT SELECTOR knob flashes.

knob/indicators

8

En

Controls and displays 03

Rear panel

See pages 6 to 7 for details regarding connections.

1 6

28 2

10

2

12

7

9

11

1 GND (Turntable ground) terminal

This ground terminal is designed to help reduce noise
when a turntable is connected. It is not a safety ground.

2

SPEAKERS A

SPEAKERS B

3

SPEAKERS B

4

5

SPEAKERS A

6 Power cord

PHONO (MM) IN

7

8

TUNER IN

SACD/CD IN

9

terminals (Right channel)

terminals (Right channel)

terminals (Left channel)

terminals (Left channel)

terminals

terminals

terminals

2132 23 24 25

10

11

12

13

AUX IN

terminals

NETWORK IN

RECORDER IN/OUT

CONTROL IN/OUT

terminals

terminals

jack

English

DeutschFrançais

Italiano Español Русский

Nederlands

En

9

03 Controls and displays

Remote control

1

2

33
4

33

33

5

6
7
8
9

10

11

4

1

 STANDBY/ON

Switches the amplifier between standby and on.

2 Input selector buttons

Press to select an input source. These select the
component connected to the corresponding input on the
rear panel.

3 NETWORK AUDIO PLAYER control
buttons

Use to control Pioneer network audio player.

4 SACD PLAYER control buttons

Use to control Pioneer SACD player.
(Cannot be used to perform playback/pause on the
PD-D6/PD-D6MK2/PD-D9/PD-D9MK2 models.)

5

DIMMER

This button allows the illumination of the unit's front
panel indicators to be set in three levels (does not affect
the STANDBY indicator).

6

LOUDNESS

Use to set the loudness circuit ON/OFF (page 8).

7

DIRECT

Press to access Direct listening (page 8).

8

SPEAKERS A

Use this button to listen to the speaker system
connected to SPEAKERS A terminals.

9

SPEAKERS B

Use this button to listen to the speaker system
connected to SPEAKERS B terminals.

10

MUTE

Mutes/unmutes the sound.

11

VOLUME +/–

Use to set the listening volume.

button/indicator

button/indicator

10

En