Luxman 308 - Tone Control Adjustments; Balance Control Operation; Bass Tone Control Functions; Treble Tone Control Functions

Balance Control:
In
case
of
deviation
between
the
volume
Jevels
of
right
and
left
channels,
adjust
the
unbalanced
volume
level
with
this
contro!
(21).
A
complete
turn
of
the
control
to
either
the
clock-
wise
or
counter-clockwise
direction
causes
a
cut
off
of
the
volume
of
the
other
speaker.
The
volume
balance
of
both
chan-
nels
can
be
adjusted
so
that
monaural
disc
sound
reproduced
by
the
stereo
cartridge
comes
from
the
centre
of
the
right
and
left
channels.
At
mid
position,
the
volume
of
both
channels
is
adjust-
ed
to
the
same
level.
Thus,
a
proper
balance
is
established
through
all
playback
stages.
If
a
programme
source
is
un-
balanced
(or
the
speakers
are
placed
in
an
oblique
position),
establish
the
correct
balance
with
this
control.
BALANCER VOLUME CONTROL
LEFT CH.
AF AMP.
RIGHT CH.
AF AMP.
BALANCER
VOLUME CONTROL
Tone Controls:
The
ultimate
purpose
of
the
audio
system
is
to
make
high
fidelity
reproduction
of
programme
sources.
The
reproduction
and.
acoustic
conditions
do
not
always
match
with
recording
conditions,
and
it
is
impossible
to
reproduce
the
same
sound
as
the
original.
Also,
there
is
no
objective
standard
to
judge
a
good
sound
from
an
inferior
one.
The
only
possible
solution
is
for
every
listener
to
create
his
favorite
sound
according
to
his
own
taste.
It
is
therefore
very
important
that
the
audio
system
offers
a
facility
to
permit
flexible
controls
for
creation
of
the
best
sound.
This
amplifier
is
equipped
with
the
LUX
original
NF
type
turn-over
(roll-off)
frequency
selector
for
subtle
and
minute
control
of
the
reproduced
sound.
Tone
controls
include
Bass
Level
Control
(4),
Bass
Frequency
Selector
(5),
Treble
Level
Control
(6),
Treble
Frequency
Selector
(7)
and
Tone
Controls
Switch
(9).
lf
the
Tone
Controls
Switch
(9)
is
set
at
the
DEFEAT
position,
flat
frequency
response
Is
obtained
regardless
of
the
position
of
the
level
controls
and
frequency
selectors.
After
setting
the
Tone
Contro|
Switchs
(9)
at
the
NORMAL
position
and
controlling
the
levels
and
frequencies
as
desired,
you
can
again
obtain
flat
25s
frequency
response
by
resetting
the
Tone
Controls
Switch
at
the
DEFEAT
position:
controlled
tone
and
flat
tone
can
be
easily
recognized.
The
Bass
Frequency
Selector
(5)
has
three
positions:
150Hz,
300Hz
and
600Hz.
From
the
position
selected,
~~~"
Bass
Level
Control
(4)
begins
to
function.
In
‘
ee
other
words,
turn-over
(roll-off)
of
a
lower
frequency
range
below
the
frequency
which
has been selected can be controlled by the Bass
Level Control (4). The controllable range is
wider by 150Hz, 300Hz and 600Hz respectively.
The Bass Level Control, which functions in
conjunction with the Bass Frequency Selector,
is a tone contro! of the lower range of the fre- ae
quency response. It is designed so that response © = re
is
flat
at
the
mid-position.
A
clockwise
turn
intensifies
the
low
frequency
range,
while
a
counter-clockwise
turn
yields
attenua-
tion. For easy adjustment, the control is equipped with an 11-
point click-stopper.
This contro! is of dual concentric construction, and usually
both channels are controlled simultaneously.
Separate contro! of either channel! is possible if oe — tess
one axis is turned while the other is held by
hand. The inner axis is for the left channel and
the outer axis is for the right channel.
These same descriptions are applicable to the
Treble Level Control (6) and the Treble Fre-
quency Selector (7). The Treble Frequency
Selector has 3 positions: 6KHz, 3KHz and 1.5KHz
(controllable range is wider in this respective Gs
order).
Treble
control
begins
to
function
ffOM
sencym:
2
the position that is selected. This control also ~~ ™™ =m
has an 11-point click-stopper, and a clockwise turn boosts the
high frequency range. It is of dual concentric construction like
the Bass Level Control.
For details of these tone controls’ characteristics, refer to the
attached chart concerning the response curve.
Mode Chart
LER T
CHANNEL
CHANNEL
MODE
l.mono L. 2.muoeno R 3L+R
RIGHT
CHANNEL
RIGHT
CHANNEL