dbx 122 - Page 10

dbx tape noise reduction circuits reduce hiss on a tape
which has already been recorded without dbx tape noise
reduction during the recording process. However, dbx
dynamic range enhancers such as our Models 3BX and
118 are capable of reducing noise on a conventional disc,
pre-recorded tape or FM broadcast. These enhancers
(expanders) can be used in conjunction with a dbx Il
tape noise reduction unit. In this combination the dbx 122
or 124 tape noise reduction unit prevents any additional
noise from being introduced by the tape recording process
and the dbx dynamic range enhancer actually increases the
dynamics and reduces noise present in the original program.
The 122 and 124 are fully compatible with all other
dbx II units, such as the 140 series or the Model 128. The
Model 128 combines the functions of the 122 with a dbx
dynamic range enhancer.
The 122 and 124 are not compatible with dbx
Professional equipment, and vice-versa, even though
all dbx tape noise reduction systems offer the same 30dB
of tape noise reduction and 10dB headroom improvement.
The incompatibility is due to signal processing differences,
as described on Page 30 of this manual. Thus, recordings
encoded with any of the dbx 150 semi-professional series
or with the 177, 187, 208, 216, or K9-22 professional series
will not sound “right” when played back through the 122
or 124. Also, while the 122 and 124 are made to decode
dbx-encoded discs, dbx professional series equipment
should not be used for disc decoding.
Alone,
either
the
dbx
122
or
124
will
dramatically
improve
the
quality
of
your
live
tape
recordings.
In
con-
junction
with
any
of
the
dbx
dynamic
range
enhancers,
the
122
or
124
lets
you
make
recordings
of
pre-recorded
material
or
radio
broadcasts
that
can
be
played
back
with
wider
dynamic
range
and
less
noise
than
the
original
source.
When
used
properly,
dbx
tape
noise
reduction
makes
an
extremely
valuable
addition
to
your
music
system
and
to
your
listening
enjoyment.
This
manual
describes
how
your
dbx
122
or
124
functions,
and
how
you
can
obtain
maxi-
mum
benefit
from
its
use.