Fisher X-100 - Page 13

loudness
Gontour
Swirch
As
the
over-all
volume
of
sound is reduced,
our hearing
efficiency
drops
ofi
more
rapidly
at the
extreme
ends
of the
tonal
spectrum
(deep
bass
and upper
treble,)
The Loudness
Contour
switch a;tomati_
cally
compensates
{or
this
natural
hearing
loss.
If
you
wish
to
listen
at low
volume,
set the
Loudness
Contour
switch
to
ON.
Compensation
will
be introduced
to
restore
the highs
and
Iows
to
a Ievel
with
your
middle-frequency
hearing
sensitivity. This
compensation
will increase
or
decrease
automatically
as the
volume
is lowered
or raised.
In
general,
it
is
suggested
thai
this
switch be
used
only
with
the medium-low
to low
volume;
otherwise,
unrealistic
sound
will result.
High Filrer
Swlrch
Use
the
High
Filter
Switch in
the
ON
position
ro eliminate
record
surface noise,
distant
AM
or FM
station
interference,
and other
unde_
.
sirable high
frequency
noises
originating
in
your
record
player
or
tape
recorder.
Keep
this
switch
in OFF
position
at
all
other times.
low
Filter
Swirch
Use the
Low
Filter
switch
in the
ON
position
to
eliminate
turntable
rumble,
or other
low frequency
interference.
Leave
this
switch in OFF
position
at all
other
times.
e
Note:
The Master
Volume
control
on
the
X-I(N
will
still afiect the
over
all volume
at the
left and right
speakers,
as well
as at the center
speaker.
Bios Adiusr
Control
This
control,
located
on
top oI
the chassis,
is not
used
during
normal
operation.
Its
purpose
is
to maintain
proper
operating
condi-
tions
for the
power
ampl.ifier
circuits,
and is
used only
for
servicing
adjustments.
The
adjustment procedure
is
described
in the
service
manual
|or the X-L(M.
Do not
attempt
to
adjust
this controln
without
first
consulting
the
seruice manual.
VOLTAGE
SPIIflEN
AND PHASE
INVRTET
@(c
ItztI
'7^
il
Center
Ghcnnel
Switch
If
a center
channel
amplifier,
and
loudspeaker
system,
is connected
to
thd X-100
(as
described
on
page
4)
ser this
.*it"h
to ON
position
to
feed
a composite
stereo
signal to
this
amplifier.
Remember
ihat
the
purpose
of
the center
amplifier
and
loudspeaker
is
to eliminate
the
"hole in
the
middle"
efiect.
It
is
only
necessary,
therefore,
to
increase
the volume
level at
the
center
speaker
just
enough
to
augment
the
stereophonic
sound
pattern,
Raising
the
center
volume
to
a
verv high
Ievel
can
diminish
the
stereophonic
efiect.
FIGURE
2. Tube
loyour
for
X-lO0