Technics RS-M27OX

"disc"
position
for
"dbx encoded
disc,'
play
This
unit
comes with
a
"disc"
position
on the Noise
Reduction
Selector
Switch for
playing "dbx
encoded
discs"
*.
When this
selector
switch
is
set to
the
position
given
in
the
figure
below,
"dbx
encoded
discs"
can
be
played
Noi se
Dolby
NR
Follow
the
procedure
given
below
(1)
Set
the recording
output
selector
swilch on the
stereo
amplif
ier
to the
"phono"
position
and set the input
selector
switch
or
tape
monitoring
switch
to the
"tape"
position.
(2)
Set this unit's input
selector to the
"line"
position
and set
the Noise
Beduction
Selector
Switch to the
"disc"
position.
(3)
Start operating the
turntable.
(4)
Adjust
the unit's lnput
Level
Controls
so that the
Fluores-
cent Meter
Scales def lect
to near
,,0
dB".
(5)
Adjust
the volume
using the volume
control
on the
stereo
amplifier.
Now
set the mechanism
to the
stop mode.
Some open-reel type
dbx
encoded
tapes
are now
available
f
rom music
stores These
tapes
can be
played
back
just
like
the
records
by
setting the Noise
Reduction
Selector
Switch to
the
"disc"
position
Notes:
olf
the
Noise Reduction
Selector
Switch is
set to the
"disc"
position
during
ordinary
tape
playback,
the
playback
sound
will not
be audible
olf
the
mechanism
is
operated
during
"disc"
play,
it will
work
but
the tape
playback
sound will
not
be audible.
lf the
Record
Button is
depressed
and the
deck
set to
the recording
mode,
the
decoded
sound
(the
now
restored
original
sound)will
be recorded
When
playing
back
this
sound,
set the
Noise
Reduction
Selector
Switch to
the
"out"
position
.lf
the
Record
Button is
depressed
when
you
are
listening
to records
with
the Noise
Reduction
Selector
switch
at the
"disc"
position,
the
sound
will
be cut
off
for
an instant
This
is not
a malfunction
aTo
record
"dbx
encoded records"
using
the
dbx Noise
Reduction
System, first
set the
Noise
Reduction
Selector
Switch to
the
"out"
position
and
start
recording
This
makes
it
possible
to record
in
the
encoded
state.
For
playback,
set
the
selector
switch
to
the
"tape"
position.
The
recording
level
should
be set
as
follows
First
set the
Noise
Beduction
Selector
Switch
to the
"disc"
position
and
adjust the
lnput
Level
Controls to
around
"-3dB"
so that
the Fluorescent
Meter
Scales
meter
pointers
do
not
exceed
"0dB',
at
peak
times.
Now
set the Noise
Reduction
Selector
Switch to
the
"out"
position
again
and
proceed
with
the
recording.
Sounds
monitored
while
recording
"dbx
encoded
records"
are
encoded (compressed)
sounds, not
decoded
sound
*
''dbx
encoded
discs
(records)"
dif f
er
f rom
ordinary
records
in
that
dbx noise
reduction
encoding (compression)
is
per-
formed
when
the
signals are
cut into
the records
During
play,
these
signals
pass
through
a
decoder
and the
original
sound
is restored.
This
makes for
a
virtually
noise-free
sound,
a
wide
dynamic
range
and
better music
reproduction
"Metal
tape"
magnetic
,,Metal
tape,, f
requency
response
characteristics
example
oda:
r6onwh/m
"Meta!tape"
Advantages
and magnetic
characteristics
of
,,Metal
tape"
1 .
Maximum
output level (MOL)
is
greater
at all frequencies.
2. Excellent
frequency
response
characteristics
at
high
input
level.
3
Wide
dynamic
range
at high
frequencies.
4.
Excellent
signal-to-noise
ratio
at high frequencies.
5
Low
distortion
Technological
developments
to
accommodate
"Metal
tape"
"Metal
tape" is
a totally
new
kind
of
high
performance
tape,
and conventional
cassette
tape
decks
cannot
sufficienily
bring
out
its
performance
potential.
Our company has
succeeded in
developing
the foilowing
technology
to
exploit the
advantages
of
"Metal
tape',
to its
fullest
extent.
1.
Development
of
the SX head
featuring
minimal
distortion with
high input
signal levels.
The
SX
head
employs
permalloy
and
it
features
a high
saturation
magnetic f
lux
density
and also
a superlative
wear
resistance.
lt was
developed
especially for
the new
breed
of
"Metal
tape".
2. Development
of
high-ef
f iciency
sendust
erase
head.
Sendust is
a material
with
a high
saturation
magnetic
flux
density
and it is
capable
of
extremely
eff icient
erasing
even
with
"Metal
tape"
with
a high maximum
output level
3.
The
power
in
the
bias
oscillator
circuit has
been
increased.
A word
about
"Metal tape"
Conventional
cassette
tapes
can
be broadly
classified
into
2
categories
according
to
the
magnetic
material
coated
on
the
tape
surface:
the
ferric-oxide
(
7
-FezOs)
type,
including
ordinary
LH
tape,
etc.;
and the
chrome-dioxide
(CrOz)
type,
including
XA
tape,
etc.
Continued
technological
advances
have
been
made
in
an
attempt
to
develop
these
tapes
to
a high level
of
performance,
but recently
there
has
been
a recognized
need
for
the
development
of a new
material
to improve performance
much
further
ln
response
to this
need,
',Metal
tape,'has
been
developed
as
a new
kind
of
tape,
employing
a magnetic
alloy
of
pure
iron (Fe)
as the
main
component
in
the
magnetic
substance.
ln
comparison
with
conventional
cassette
tape,
,,Metal
tape,,can
record
a
far
greater
amount
of information
at a high
density.
As
a result,
the maximum
output level (MOL)
has
been
improved
throughout
the
entire range,
and,
in
particular,
the frequency
response
characteristics
at high
levels
and the
dynamic
range
in
the
high range
have
been
greatly
improved.
This
means,
therefore,
that
a remarkable
improvement
of sound
quality
has
been
made
possible
(lt
should
be noted
that
the
tape
base
and
parts
of the
tape
other
than
the magnetic
substance
are
com_
posed
of the
same material
as
previously
used.)
-4-