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eil / General Section

M 100-ADPL

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GRUNDIG

Service

SOURCE

For selecting the desired listening source.

LOUDNESS

This switch is used during playback
to adapt the volume level to
individual hearing sensitivity.

DIRECT

This switch is used to bypass the BASS,
TREBLE and LOUDNESS controls

SPEAKERS

This switch is used to switch all
speakers on and off.

PHONES

This socket is for connecting standard
stereo headphones with a 6.3 mm
jack. Volume is adjusted with the
rotary

VOLUM

E knob.

BALANCE

This control is used to adjust the sound
balance between the left and right
channels

BASS

This is to adjust the bass tones.

TREBLE

This is to adjust the high tones.

SURROUND

This button is used to switch between

INSTALL

SURROUND (DOLBY PRO LOGIC) and
STEREO mode.
When pressing this button longer, you
enter the SURROUND INSTALL mode in
which you can call up different surround
settings which can then be manipulated
with the

and

– REAR

buttons:

NORMAL

WIDE

PHANTOM

: use the

and

– REAR

buttons to select the centre

channel mode.

DELAY

: use the

and

– REAR

buttons to adjust the delay time of the rear
channel.

TEST

:You will hear a 2 second test tone from

your speakers in the following sequence:
Front left channel –> Centre channel
(value can be adapted with

and

– REAR

) –> Front right channel –>

Rear channel (value can be adapted with

and

– REAR

POWER

For switching the amplifier on and off.

– REAR

In PRO LOGIC mode: to call up rear
level adjustment mode and to lower
the rear or centre level (related to the
front level).
In SURROUND INSTALL mode: to
manipulate the different surround
settings

In PRO LOGIC mode: to call up
centre level adjustment mode and to
increase the centre or rear level
(related to the front level).
In SURROUND INSTALL mode: to
manipulate the different surround
settings

VOLUME

This control is used for adjusting the
volume.

OPERATING ELEMENTS

M100-ADPL

SURROUND

INSTALL

SURROUND

INSTALL

SOURCE

– REAR

VOLUME

BASS

BALANCE

PHONES

TREBLE

POWER

LOUDNESS

DIRECT

SPEAKERS

LOUDNESS

DIRECT

SPEAKERS

BALANCE

BASS

TREBLE

PHONES

SOURCE

VOLUME

– REAR

SURROUND
INSTALL

DIRECT
LOUD

PRO-LOGIC

########

Front of the amplifier

Switching on and off

When you want to switch your amplifier on, press
the

POWER

button. The red LED in the middle of the

button indicates that the unit is on.

button depressed: POWER ON
button not depressed: POWER OFF

The amplifier will be activated and the source that
was chosen before the power was switched off will
be selected again.
If the amplifier had been switched to standby before
it was switched off, the standby mode will be
selected when the power is switched back on.
The units connected to the AC outputs are also pro-
vided with power when the amplifier is turned on.
To switch off the amplifier press the

POWER

button

again.
When you switch the amplifier off with

POWER

, all

auxiliary units which are connected to the amplifier
via the AC outlets are disconnected from the power
supply.

Stand by

You can switch the system to STAND BY with the

button on the system remote control.
This also disconnects any units connected to the
A.C. outputs from the power supply. Active STAND
BY mode is indicated by the red LED in the middle
of the power button.
When you want to switch your system on again,
simply press the

SOURCE

button on the unit or one

of the input selection buttons on the remote control.

Note:

In order to keep power consumption at about

1W a stand-by transformer has been built in.
The choise for this option is a consequence of
Grundig's environmental policy targeting to reduce
unnecessary power consumption.

OPERATION

SOURCE SELECTION

➥

TUNER

➥

TUNER

TAPE

VCR

➥

PHONO

➥

Source selection

• Press repeatedly the

SOURCE

button to select the

desired listening source.

– The sources will light up on the display and are

selected in the following order:

TUNER

TAPE

VCR

PHONO

TUNER

-> etc.

Automatic source selection

The RC-BUS of this series enables, among others,
that the amplifier automatically selects the correspon-
ding source if the respective unit starts to play.

E.g.:

• If you press the

SHUFFLE

buttons on the CD player, the amplifier
automatically selects the input

• If you press

STATION

1 2

TUNING

on the tuner, the amplifier automatically

selects the input

TUNER

• If you press

PLAY

on the cassette deck, the

amplifier automatically selects the input

TAPE

Switching the speakers on and off

Use the

SPEAKERS

button to switch all the

connected speakers on and off.

– When the speakers are switched on, the speaker

indication on the display lights up.

VOLUME

The volume can be adjusted with the rotary

VOLUME

knob.

The volume can also be controlled via the remote
control with the /– buttons.
An illuminated dot in the VOLUME knob indicates
the respective adjustment position.

MUTING

The volume can be completely muted by pressing
the

button on the remote control.

This is useful, for example, if you want to take a
telephone call and do not want to be distracted by
music, news, etc., from your system.
If the muting function is used when recording a
tape, this has no effect on the subsequent recording
volume level as only the speakers are muted.
The LED in the volume knob blinks when the
MUTING function is active.
The MUTING function can be deactivated by
pressing the

button again or by pressing the

button on the remote control or any one
of the input selection buttons.

BASS, TREBLE

The

BASS

and

TREBLE

controllers can be used to

individually adjust the higher and lower frequencies
from the sound of your speakers. In this way, you
can compensate for surrounding acoustic
irregularities which may be caused, for
example, by sound reflection behaviour on walls
with relatively large, empty surface areas, or
"damping" caused by furniture or other objects.

Note:

These controls only function when ‘DIRECT’ is

switched off.

SOUND CONTROL

DIRECT

LOUD

LOUDNESS

Pressing the

LOUDNESS

button slightly accentuates

the lower and higher frequencies which renders a
more balanced overall sound during playback at a
low volume.

Its effectiveness depends in turn on the setting of the
volume knob. The sound is thus optimally adapted
to human hearing sensitivity, which is also
dependent on the respective volume.
If you have connected speakers which exhibit a
great deal of bass,

LOUDNESS

should always

remain off to achieve a more linear acoustic
pattern. In this way, you compensate for excessive
emphasis of the lower frequencies.

DIRECT

The

DIRECT

function bypasses all tone controls

bringing the sound unchanged to the speakers.
This means that the influence of the LOUDNESS,

BASS and TREBLE controls is removed from the
signal path

Note: LOUDNESS and DIRECT can not be switched
on at the same time.

BALANCE

For effective stereo playback, it is important that the
sound emanates equally from both speakers.
Acoustic equalibrium can be distorted by furniture
groups or the listener´s position in a room, thus
distorting the impression of stereo sound.
The

BALANCE

controller can compensate for such

distortions.

Important:

Proper speaker connection is also important for
quality sound.
• As seen from the listener, the right speaker must

be connected to the right terminal (right channel)
and the left speaker to the left terminal (left
channel).

• One of the wires of a loudspeaker cable is

marked, e.g. with a colour or rib. Connect the
marked wire to the red terminal, the non-marked
wire to the black one. Make sure that all
loudspeakers are connected in the same way.

Speaker positioning

General hints for positioning

Avoid positioning the speakers in a corner or on the
floor, as this will boost the bass tones too much.
Placing the speakers behind curtains, furniture etc.
will reduce the treble response, thus reducing the
stereo effect considerably. The listener should
always be able to ‘see’ the speakers.
Each room has different acoustic characteristics and
the positioning possibilities are often limited. You
can find the best position for your speakers by
following the picture on the right. The speakers
should always be arranged as symmetrically as
possible in the room.

Positioning the centre speaker

The centre speaker should be placed in the centre
between both front speakers, e.g. underneath or on
top of the TV. The best height for the centre speaker
is at the height of the listener’s ears (while seated).
Note: to avoid interference with the TV picture, use
only a magnetically shielded centre speaker.

Positioning the surround speakers

The surround speakers connected to the

REAR LEFT

terminals of the amplifier should be on the left and
the surround speaker connected to the

REAR RIGHT

terminals of the amplifier on the right side of the
listener in the room.
The surround speakers should face each other and
be in line with, or at most 1.5m behind the listener.

Tip:

Select for the front left and right channels your

best speakers (HiFi) so that optimum stereo sound is
achieved. The centre speaker can be a small one or
also a HiFi speaker. For the rear or surround
channel you should use smaller speakers because of
less power and a limited frequency range.

SPEAKER POSIT CONNECTION

In order to take full advantage of your unit´s supe-
rior playback quality and overall performance,
only HiFi speakers with corresponding load
ratings should be used.
• The speakers should have an impedance of 4

to 16

Ω

. I

• In addition, always make sure that speaker

wires are properly and tightly twisted to avoid
protruding individual wires. These can cause
shorts.

PHONO

TAPE

OUT

VCR

OUT

TUNER

RIGHT