dbx 122 - Page 4

NOTES:
To
avoid
repetition,
the
word
‘‘preamplifier’’
is
used
to
mean
preamplifier,
integrated
amplifier/preamplifier,
receiver,
or
the
tape
monitor
loop
of
an
equalizer,
reverb
unit
or
other
device.
if
your
preamplifier
does
not
have
a
tape
monitor
loop*
(tape
record
outputs
and
play
inputs),
substitute
other
suitable
connections.
A. Power Switch
Push
once
to
turn
ON
the
dbx
unit’s
AC
power,
push
again
to
turn it off.
B. Pilot Lamp
When
the
Pilot
Lamp
is
illuminated,
the
AC
power
is
ON.
C. Noise Reduction Switches
REC
Push
this
switch
and
the
TAPE
switch
to
record
a
dbx-
encoded
tape.
BYP
Push
this
switch
to
bypass
the
dbx
noise
reduction
circuitry
(a
“hard-wire’’
bypass).
PLAY
Push
this
switch
and
the
TAPE
switch
to
play
back
a
dbx-
encoded
tape.
Push
this
switch
and
the
DISC
switch
to
play
back
a
dbx-encoded
disc.
NOTE:
For
a
stereo
setup
using
the
124,
leave
channels
1
&
3
switched
to
REC
and
channels
2
&
4
switched
to
PLAY.
For
the
122
in
a
stereo
setup
or
the
124
in
a
4-channel
setup,
it
will
be
necessary
to
switch
all
channels
between
the
REC
and
PLAY
modes.
D. Play Level Match
This
control
allows
you
to
adjust
the
122's
output
level
to
your
preamplifier.
Like
the
RECORD
LEVEL
MATCH
control,
this
adjustment
is
not
critical
and
does
not
affect
the
linearity
of
the
dbx
encode/decode
process.
PLAY
LEVEL
MATCH
is
adjusted
so
that
playback
levels
are
approximately
the
same
when
you
are
decoding
a
dbx
encoded
tape
or
disc
as
when
you
have
the
122
in
BYPASS
mode
for
playing
a
conventional!
source.
Detailed
instructions
for
this
adjustment
are
on
Page
15.
*The
tape
or
record
outputs
and
tape
or
play
inputs
located
on
the
rear
of
most
preamplifiers,
integrated
amplifiers
and
receivers
for
operation
of
a
tape
recorder.
E. Play Mode Switches
TAPE
Push
this
switch
and
the
appropriate
Noise
Reduction
Switch
(REC
or
PLAY)
to
record
or
playback
a
dbx-encoded
tape.
DISC
Push
this
switch
and
the
PLAY
switch
to
play
a
dbx-
encoded
disc.
If
the
124
is
set
up
for
two
channel
simultaneous
record
and
playback,
as
shown
in
Figure
5,
press
the
BYP
switch
on
Channels
1&
3,
the
PLAY
switch
on
Channels
2
&
4,
and
the
DISC
switch.
To
play
a
conventional
(non-encoded)
disc
through
the
dbx
unit,
push
the
BYP
switch
and
the
DISC
switch;
alternately,
switch
the
dbx
unit
out
of
the
circuit
by
placing
the
preamp in SOURCE mode.