dbx 400-X Owners manual

Page 1
dbx
Model 400X
Program-Route
Instruction
Selector
Manual
Page 2
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
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
Page 3
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
Page 4
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-
Page 5
,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-
Page 6
4
REAR right face
See
the facing the
unit
Note
also point the
in
other Finally, use
it
for
hookup
page.
itself
the
if
the
Note
is
that
direction
unit)
your
right
illustrations
an
the
and
cables
1 LINE. This is
400X
to
your
to
the
400X's
400X's
Line
Out,
JACKS,
to
left
the
back
that
the
overhead,
triangles
of
signal
"In"
(From
have a side
channel.
where
preamp.
Line
In
left
as
you
panel
on
this
one
from
not a rear,
below
flow:
the
you
hook
Connect
and
its
to
left,
and
the
"Out" other with
up
its
Tape
right
3
the
the
400X's
unit).
red
the
Tape
In**
to
top
of
view.
(To
plugs,
model
to
right.
jacks
Out*
the
2
If
you
have a current NX-40), the
fastest
non-dbx Dolby
Do unit
is
the
more
as
Don't
study
facing
nomenclature
i~R
ones)
the
same
(122/4/8).
most
easily
left
and
use
page;
units
have
if you
complicated,
if you
jacks 3 and 4 as
the
Record numbered 2 and of
jacks
numbered 1 and
left
empty
(nothing
dbx
the
appropriate
that's
the
to
(e.g.,
similar
have a previous
In
the
case
designate
side's
4 or
the
plugged
unit
easiest
follow.
the
old
labeling.
of
the
hookup
jacks 1 and
right
pairs Play 3;
they're
into
(222/4/8
hookup
and
Some
Advent
dbx NR
a 124,
(red).
of
side's
okay
them).
or
on
which
will
jacks
pairs
go
2
2
3
SOUND
your See order. (To)
PROCESSOR
equalizer,
the
Usage
Connect
jacks connect (From).
Repeat
NOISE
you (NR)
*Also Rec, **Also tor,
for
REDUCTION
put
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unit.
called
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called
Playback,
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to
your
its
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each
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Tape
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imager,
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the
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triangles.
processor.
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Tape
(In)
From
1,2,3.
for
This is
expander
advice
(etc.)
about
400X
Input,
to
the
400X's In
UNIT. This is
noise-reduction
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(Out)
To
Play,
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Tape,
Tape
From
where
and
where
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Moni-
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the
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note
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according!
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of
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SOME
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Page 8
USAGE
To
the
order
As monitor the
400X
location
preamps,
and
in
the
Also
you will preamp
(knobs,
switch) that
you
the
impulse
NOTES
get
the
in
which
mentioned
loop(s) of
go in
for
the
although
400X
as
mentioned,
have
to
has
those usually), set
to
Tape 1 and
want
to
of
most
your
the
400X
.
leave
separate
you
listen
most
out
to
connect
earlier,
preamp.
first,
is in
if
you hook
the
must
to
people
of
the
dbx
your
other
the
400X
If
yours
leaving
the
to
Tape 1 switch
leave
use
and
so-called
it
use
"Input
the
route
is
the
the
up
the
Selector"
the
Rec
opposite.
model
will
second
there
400X
unit's
through
400X, you
equipment.
be
most
has
two
free
external-processor
you
lose
in
Tape 1 --to
(usually a button)
and
Input
Out
knob
the
must
useful
tape
loops,
for
the
flexibility
"Record Selector to
choose
400X.
We
gl
ve
if
it's
we
future.
(EP)
both
get
signal
ln.
However,
Out"
selection
knob (or
the
program
emphasize
some
thought
in (one of)
recommend An
alternative
loop
of
certain
in
your
to
and
switches
tape-monitor
source
this
to
the
tape-
that
preamp
frorn
if
your
because
it
Now. cause ser.ds 1 (SP) and that
than
switch, experiment
we
judgment ful
enable
Equalizers
nominal sound of sound be
it
affects
the
program
to 2 to
must
experimentation
the
placed
J.
loop 1 gets
so
on.
loop
and
If a processor
three
that's
Since
emphasize
is
you
User-controlled
filter
of
the
speakers
processing
early
Once
If
the
If
the
proceeds
are
entirely
the
with
it's
called
to
find
settings--
musical
you've
what
sound
signal
corresponding
the
signal
button
to
has
its
possible.
place
switching
impossible
and
to
on
that
for
in
with
out
what
"graphic"
program
room.
be
done,
in
the
to
hooked
through
first,
is
disengaged
the
to
this
any
various
are
400X
up
the
changes
next.
own
put a fourth
it
before
suggest a "perfect"
section
complex
works
employed
as
This
so
's
you
the
button
after
tape-monitor
And
and
contains
combinations
best.
equalizers
to
correct
kind
of
if
you
signal
400X.
(up to)
which
or
if
unit
arrangement
by
equalization
follow
path,
can
is in,
left
one
after
(EQs)
some
the
obtain.
three
the
it's
out,
loop,
of
the
for
the
guidelines
and
for
large
the
probably
order
processor
passed
maximum
order
--commonly
people
practice,
becomes
As
noted,
connected
to
naturally,
of
course,
initial
processor
for
only. Your own good
of
your
sequences
as
irregularities
is
perhaps
in SP
important,
the
processors
in Sound
the
processor
the
signal
hookups
three
has a PrejPQst
flexibility:
with
PrejPost.
all
signal
stereo
much
your
loop
system.
of
hookups
having
to
the
equalizer
1.
model
change in
most
-WOX
in
Processor
in
bypasses
of
more
you
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preamp's
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its
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speaker
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speaker
Preamp
Out
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corrected
synthesizer
20/20)
reason
then
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to
operate other
after a program
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the
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least,
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order
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first.
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after
combinations
result
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Page 10
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the
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400X's
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processors); and
the
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out.
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ther
signal
coded
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with
A
dbx Reduction encoded must for button in,
be
its
part,
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to
Tape.)
tapes
pushed
imagers,
but
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can
play
220
series
preamp
have
one
Noise
400X's
SP
record
any
one
buttons
set
the
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processing,
a Model
model
loop,
must
as
as
in
21
well
and
have
(at
reverb
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devices
EQs
like
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dbx-encoded
(or NX-'+0)
decoder.
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to
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of
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of
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must
unit
if
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signal
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for
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as
one
its
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this
records.
of
its
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go 20/20.
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or
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in.
and
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loop,
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discussed
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location
the
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buttons
button
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of
toward
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of
units,
the
operation
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or
units,
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downstream
according
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can
be
21
can
the
records,
must
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and
course,
the
the
or
that's
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it
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earlier.
the
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with
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to
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be
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every-
previous
you
by
its
used
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of
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the
must the the
these
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record
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the
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400X
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or
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button encoded
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or
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is
with
play
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cassettes
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to
use
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of
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the
noise-reduction
a dbx
in,
record
too,
this
your
occupied
first.
Preamp
jacks
jacks
alone.
now,
naturally,
way
as
21
In
the
well.
for
dbx-record
with
this
case,
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400X's
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connect
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the
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the
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the
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the
front,
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is
pushed
is in. You
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recorded encoded,
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jacks
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the
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400X's
the
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to
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be
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the
to
Page 11
be
decoded
copy,
for
example),
on
playback.
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tape
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make
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sound
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the
er
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or
capability,
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to
the
buttons
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dbx
all
the
processors
Noise-Reduction
If
you wish
400X'
s
The
unit's
Out
jacks,
Tape
(Monitor)
to
the
whatever.
one
of
deck's
out.
the
records.
way
down,
(in
to
Noise
dbx
unit's
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and
The
second
named
second
See
Deck
cassette
too.
the
loop
instructions
(Don't
Post)
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Reduction
Preamp its
To
In
jacks
unit's
below;
decks
To
400X's
number,
forget
you
won't
connected
Units
To
Tape
(Tape)
Preamp
returns
unit's
go
From
it's
take
with
dbx
Noise
with
dbx
advantage
tape
loops,
and
leave
in your
to
turn
hear
the
to
the
noise-reduction
Unit
loop,
it
Recorder
Out(put)/Line
(Tape)
to
the
dbx
To
Tape
Record(er)
to
the
400X's
Tape
Record(er)
easier.
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noise
reduction
of
this
set
the
Sound
Decode/Encode
cassette
up
record.)
400X
should
Input
In(put)/Line
unit's
deck's
the
deck's
as
unit
go
(or
In(put)jFrom
From
In(put)/To
Encoder:In,
Out(put)/From
offer
feature
You
usual.
(say,
in
equivalent)
Out(put)jTo
Tape
when
Processors
owner's
recording-level
may,
an
the
dbx
Recorder
and
record-
the
to
and
all
the
manual
of
course,
outboard
unit's jacks
Tape
Tape/Tape
its
tape-record-
go
RecjTo
Tape
Output
Decoder:Out
Tape/Tape
deck
Post,
Rec
for
control;
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Dolby
to
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Rec
is
the
the
B)
the
Amp
jTo
or
Out
jacks
Play
When
system
connections One-Way
of aren't
record
sequence.
out,
For
more
("Single-Ended,"
A
noise-reduction
record
pops,
encoded,
decoder
using
and
help
and
clicks,
(if
dbx
noise
vice
versa.
with
following.
unit
scratches
should
be
you're
)-
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reduction,
other
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units'
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that
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etc.
placed
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it
generally
nomenclature,
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on
playback
or
to
reduce
the
next
SP loop on
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any
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best
see
Units
only,
steadier
the
it
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to
the
to
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after
be
early
the
other
on
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the
sources
a dbx
on in
sound
that
the
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Page 12
Other
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because
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to
or
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already
before
instruction
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two,
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given.
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bass
reinforcers,
experiment
manuals.
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tone
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experiment
is,
locate
with
in
one
of
channel
about
it
where
after
expanders,
care,
while
the400X's
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to
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record
and
decoders
automatic
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SP
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warning
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you
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or
as
sound-processor
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this.
overloaded
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strong
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wide
cassette
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bass
is
dynamics
desks.
go
easy
by
already
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be
routed
the
signal a 400X extremely
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have
enough
through a single
processing
and
a 200X, complicated.
Inputs
and/or
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the
to
the
order
hooked
cassette
too
much
the
bass
about
pushing
up
to
decks,
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it
and
tape
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CD
player
particular
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the
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noise
sig
reduction
nals
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400X:
that
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sources.
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in
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even
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synthesizing
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will
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stems
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it's
best
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can
via
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multi-channel
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used
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inputs
the
loop's
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your
very
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tape
best
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subharmonic
dynamic
even
taping
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etc. processors
to
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400X. With
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tape
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Page 15
WARRANTY
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All purchased details,
The questions
You
also 92-2522.
outside
consult
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and
may
and
FACTORY
products
the
your
Customer
information
call
(617)
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Service
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SERVICE
by a
valid
only in
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Chapel Newton, Attn:
Customer
during
limited
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will
write
St.
Mass.
business
warranty
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country
dealer
help
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to:
02195 USA
Service
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use
this
hours
(USA
purchase
product.
Eastern
for
products
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For
Time).
USA).
answers
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For
to
Telex
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of
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Service
If
address
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Send
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strongly
whenever
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the
become
the
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outside
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necessary
including a note
freight
authorized
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prepaid
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to
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repair
your
equipment
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address,
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"Attn:
send
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distributor
factory:
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by
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the
for
date
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the
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Page 16
Printed in
984-l.OM-600278
KT400XU*XX
Japan
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