Marantz PROFESSIONAL PMD740 - Page 5

Really
Important
Stuff
to
Know
Before
You
Start
1.
Track
Format:
4
tracks
on
a
standard
cassette
Stereo
music
requires
2
tracks
of
tape—one
for
the
left
speaker,
and
one
for
the
right
speaker.
That
is
why
stereo
tape
is
sometimes
referred
to
as
2-track
tape.
Stereo
cassettes
actually
have
4
tracks
on
the
tape.
Tracks
1
and
2
comprise
the
stereo
music
on
side
A,
and
tracks
3
and
4
comprise
the
stereo
music
on
side
B.
See
figure
1.
In
order
to
record
and
play
4
tracks
simultaneously,
the
PMD740
uses
the
two
tracks
from
side
A
and
the
two
tracks
from
side
B
at
the
same
time.
See
figure
2.
Effectively,
PMD740
4-track
tapes
do
not
have
a
side
B—they
only
have
a
side
A.
(Fig
1)
Normal
Stereo
Cassette
Track
Format
(Fig
2)PMD
740
4
track
format
PLAYING
SIDE
A
PLAYING
SIDE
B
You
cannot
turn
a
PMD740
four
track
tape
over,
and
record
more
tracks
on
side
B.
To
protect
yourself
from
accidentally
using
side
B,
and
destroying
your
work,
you
can
break
the
record
protect
tab
on the
top
right
side
of
the
tape
(looking
at
side
A).
2. Tape Type
The
PMD740
is
designed
to
provide
optimum
performance
with
high
quality
chrome
tapes
(sometimes
called
CrO,,
Type
Il,
or
High-position
tape).
Marantz
recommends
the
use
of
these
chrome
tapes
in
C-80
(90
minute)
or
C-60
(60
minute)
lengths.
Longer
tapes
(C-100,
C-120)
may
be
too
thin
to
maintain
sound
quality
during
heavy
use
(such
as
long
overdub
sessions},
and
shorter
tape
will
not
provide
much
recording
time.
Because
you
cannot
use
side
B
of
the
tape,
a
C-60
=
30
minutes
of
recording
at
normal
speed,
and
15
minutes
of
recording
at
high
(double)
speed.
3. Impedance >
When
you
connect
other
equipment
to
the
PMD740,
be
aware
of
impedance
matching.
As
a
rule,
you
may
connect
lower-impedance
outputs
to
higher-impedance
inputs.
4. Power supply
The
PMD740
is
shipped
with
a
DC
power
supply.
if
any
DC
adaptor
other
than
the
DA7AOPMD
is
used,
be
sure
that
the
voltage,
amperage,
and
polarity
of
the
adaptor
are
the
same
as
that
of
the
DA740PMD.
a)
e—D-O
Polarity of AC adaptor.