INSPECTION
Your
it.
Nevertheless,
of
damage.
material,
In
you
ever
In
contain a set
mounting
The
the
supplied
tion;
other
generate
CAUTION
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO
VICE PERSONNEL.
TO
TRIC SHOCK. DO
COVER (OR
and
INSTALLATION
unit
was
carefully
we
recommend
If
there
and
notify
any
case
need
to
addition
(two
brackets,
400X is
brackets.
components
excessive
REDUCE THE RISK OF ELEC-
is
such
your
it
is a
good
ship
your
to a model
pairs)
of
and a warranty
mountable
No
may
heat.
NOT
BACK)
QUALIFIED
dbx
REMOVE
packed
evidence,
dealer
idea
unit
in
400X
hookup
into
special
be
stacked
SER-
at
the
examining
don't
immediately.
to
save
the
the
future.
and
this
cables
with
/registration
any
standard
cooling
or
above
factory
both
carton
destroy
carton
instruction
conventional
card.
19-inch
ventilation
or
below
alert
uninsulated
within
may
constitute
to
alert
important
instructions
accompanying
in a
carton
and
the
carton
and
packing
manual,
(48.3-cm)
is
the
This
you
the
be
of
persons.
This
you
designed
contents
or
any
materials
the
RCA
equipment
required
400X
provided
symbol
of
the
dangerous
unit's
sufficient
a
risk
symbol
of
the
operating
in
the
the
to
for
of
the
carton
phono
in
any
is
intended
(pin)
presence
voltage
enclosure
magnitude
of
electric
is
intended
presence
and
literature
unit.
protect
any
signs
packing
should
should
plugs,
rack
with
installathey
don't
to
of
that
to
shock
to
of
maintenance
WARNING:
Rain
VOLTAGE
small
cover
which
Don't
For
"dbx"
is a registered
or
Moisture.
If
you
screwdriver.
plate,
exposes
turn
120V
ac:
10
120V--
To
Prevent
CONVERSION
ever
move
the
the
plate
AC
120V
AC
need
to
For
the
the
switch,
switch
over.
I
120V
~
trademark
Fire
or
change
US
turn
in
its
Shock
version
new
the
Hazard,
voltage
model,
the
plate
voltage
e]
~·220V
Use a
and
screwdriver
slide
of
dbx
Inc.,
Newton,
Do
Not
Expose
setting,
first
upside
position),
For
move
unscrew
down
220V
and
ac:
Important:
for
European
UL
listed
model.
o@~@o
Mass.
USA
(180°,
This
model
AC
This
the
the
screw
setting
120V
Appliance
switch
small
in
other
it
back
and
with
voltage
is
only
not
to
a
words,
on.
for
CONTENTS
Front
Rear
Some
Usage
Block
Schema
Warranty
Important
panel
jacks (connections)
typical
notes
diagram
tic
................................................
and
information
(operating
hookups
...............................................
......•.•........•..........•................
factory-service
instructions)
..••......•....•..........•.....••....
••••.•••..•••....•..•...•.•.••....•.•••.
.•••.•••••••••••••••••••••••••
information
for
users
in
the
United
.•••.••••..••.•••....•.••
Kingdom
.•.•••••.•••...•
2
4
5
6
11
12
13
13
READ
THIS
The
a
tape-monitor
or
receiver
more
than
choice.
in
the
The
next
for
your
new
in
the
signal
to
be
going
if
you've
loop,
If
leave
your
preamp
separate
leave
and
Out
the
choose
knob.
SOUND
let
sound
imager --connected
Push
corresponding
path.
gram
hooked
pass
The
1,
then
emitting
the
indicates
essors
lA
SOUND
These
processor(s)
Pushing
of
the
process
before
processor(s)
only,
FIRST
best
place
to
(record/play)
("preamp"
one
such
details
section,
now, simply
4-00X
path
to
and
connected
the
is
Input
Select
Select
the
See
"Usage
from
loop,
about
"Rear
note
to
be in
--
the
from
the
preamp
one
and
knob
program
FRONT
(see
facing
PROCESSORS 1 ,2,3.
you
switch
in
and
processor(s)
one
or
more
processor(s)
You will
through
up.
the
processor(s).
processors
2,
diode)
400X'
s
the
in
the
be
whichever
Leave
enter
then
3.
will
faceplate
presence
signal
PROCESSORS:PRE,
buttons
control
relative
"Pre"
deck,
puts
which
(equalize,
it
gets
recorded.
after
which
means
locate
your
loop
dbx 400X is in
in your
now on).
Tape
this
1 is
the
hookup
Jacks."
that
in
operation
signal
it.
4-00X
set
of
those
Rec
(or
whatever)
source
In
in
to
always
other
the
monitor
that
Out
with
Notes."
PANEL
page)
These
out
of
operation
--equalizer,
to
the
back
of
the
buttons
into
sending
the
musical
processors
the
button(s)
in
sequence,
The
yellow
light
LED
up.
Throughout
"route," a yellow
of
one
or
path.
POST,
the
position
to
your
tape
the
processor(s)
means
expand,
that
etc.)
"Post"
the
deck(s),
that
you
on
alter
preamp
If
you
obvious
are
given
order
--
that
has
words,
Tape
Tape
have
switches,
on
Tape
the
buttons
expander,
of
to
put
the
signal
are
out
to
of
course:
(light-
more
COPY.
of
the
deck(s).
ahead
you
can
the
signal
puts
the
playback
the
sound
have
for
is,
1
Rec
the
4-00X.
the
pro-
by-
LED
proc-
1.
when
"Copy"
essor 1 ,2,
master")
you're
for
listening
dubbing:
or 3 between
deck
and
to
it
places
the
recording
deck(s).
2 MONITOR:LINE,T APE 1
buttons
tor).
player,
"Tape"
trol
amp from
cates
green
(Decoding
monitor
NOISE
:COPY,
3A
The
(record)
your
unit.
monitoring
corded
NR
3B
The
encoding
inserted
cedure.
either
encoded)
deck.
cassette
example,
before
Leave
(deck-to-deck)
recording,
The
lights
involved,
stream"
to
"Line"
radio,
is
which
that
one
button
choose
your
signal
the
the
indicates
is
what
is your
TV
record
/VCR,
deck(s).
gets
4-00X. The
signal
that
explained
at a time.
returned
is
next.)
REDUCTION:DECODE:MONltor
and
:ENCODE:LINE
top
pair
of
buttons
or
dbx
or
Pushing
--provided
unit
have
bottom
separately
That
encoded
This is
decoder
other
of a
this
pair
and
decoding
is,
before
handy
(playback)
noise-reduction
both
in,
of
tape
while
your
simultaneous
of
buttons
functions
into
the
copy
or
decoded
iJeing
copied
for
of a dbx-encoded
to
play
over
your
you've
the
red
LED
up
from (after)
bottom
that
for
that
and
added
a dbx
buttons
dubbing
is, involving
under
the
function
similar
red
the
and
"Encode"
procedures.
the
tape.
signal
the
playing
,2,3.
to
Push
listen
and/or
or
other
These
buttons
yellow
being
it's
being
processed;
Push
or
choose
the
section
course,
it's
being
cassette
permit
a dubbing
master
(if
it
by
making
tape,
car
stereo
decoder
out
for
for
regular
no
dubbing.
whenever
ones
do so
encoder
Push
proc-
("copy
(receiving)
these
to
(moni-
CD
source;
con-
to
your
pre-
LED
indi-
decoded.
only
:COPY.
encoder
of
(NR)
permits
re-
deck
and
capability.
the
to
be
pro-
can
be
already
is
another
a Dolby-B
for
to
it.
direct
tape
button
it
is
"down-
in dubbing
the
one
or
-2-
,r-'-·4
5A
5B
TAPE 1 ,2,3:COPY
these
tape
yellow
buttons
deck
for
LED will
and/or a signal
in
the
dubbing
and
the
copying
REC
SELECTOR:TAPE 1 ,TAPE
LINE or
The
which
the
the
The
which
tape
LEOs
been
it
has,
before
For
one
:COPY
top
row
deck(s)
line
input
400X.
second
deck(s)
played
indicate
inserted
you
it
decks
of
the
of
row
on
can
gets
that
unused
MASTER.
to
choose
dubbing.
light
processor
path,
deck(s).
and/or
buttons
you
want
(record
of
buttons
do
the
the
master
whether
before
encode
to
the
are
turned
Copy
the
The
if
the
(respectively)
between
:ENCODE
lets
to
use
player,
lets
copying
deck.
the
the
receiving
the
signal,
copying
off:
Master
Push
one
"Copy
green
NR
decoder
copy
2,T
Master"
and/or
master
APE
CANCEL.
you
choose
for
recording
radio,
you
etc.)
choose
(dubbing) of a
The
NR
encoder
deck.
of
course,
deck.
press
any
buttons,
of
are
red
has
3:
to
If
5C
then
press
powered
them
any
deck
For
from
adverse
example,
but
empty),
(3 is
preferable),
Note:
for
this
This
the
yet
decks,
button
the
before
recording
switching
bottom
encoding
keep
as
will
Noise
setting.
This
means,
dbx
copies
receiving
want
to
the
deck.
your
interaction
if
not
the
push in
you
or
Copy
button
(Doing
this
system,
you're
using
Tape 2 one
Copy
Master:Tape 2 or
and
also
turn
on
playing,
for
disconnects
thereby
with
Copy:Tape
the
remember
arrangement.
row
lets
you
individually
process
the
function
above.
selectively
to a given
active
In
other
words,
defeat
Reduction:Encode:Copy
for
of a
decks
make
example,
particular
except
a Dolby
that
tape
one
on which you
copy.
each
your
your
(and
unused
deck
for
other
the
you
on
un-
preventing
preamp.)
Tape
Tape
1
3 is
3
2.
deck(s)
to
undo
cancel
and
each
action
of
button
can
make
all
the
lA
3B
5B
5C
AC LINE VOLTAGE REQUIREc\-\ENT I'lDICATOR.
The
recessed
nominal
400X
ac
has
AC POWER CABLE.
any
50
or
correct
line
LINE VOLT AGE
requires
indica
line
voltage
been
set
60Hz
ac
voltage,
requirement.
a maximum
tor
displays
for which
at
the
factory.
Connect
power
as
shown by
source
of 5 watts
the
the
this
cable
of
the
the
The model
ac
power.
to
ac
400X
-3-