dbx 128 - Page 19

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Making a Non-Encoded Copy from a dbx-Encoded Master
This is sometimes necessary so that the copy can be
played without the benefit of dbx I| tape noise reduction.
The copy will be similar to an original recording made with-
out the benefit of dbx processing: in other words, with
restricted dynamic range and audible tape hiss.
1. The encoded master tape must be dbx-decoded prior
to feeding the slave machine. This may be accomplished in
a number of ways depending on the nature of your
installation.
2. If your preamplifier, amplifier or receiver has two
tape monitor loops with switching for ‘‘Dub A to B” or
similar copying provisions, connegt your system as shown
in Figure 10.
3. If your preamp (or receiver) has only one tape monitor
loop, there are two ways to make a non-encoded copy.
Machine A
Either disconnect the dbx PLAY OUTPUTS from the pre-
amp’s monitor inputs, and connect the cables instead to the
slave machine’s RECORD INPUTS, or simultaneously con-
nect the dbx PLAY OUTPUTS to the preamp and to the
slave’s RECORD INPUTS by using a “Y” adapter as shown
in Figures 11-& 12.
4. In either case, set the 128’s front panel switches and
controls as shown.
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Fig.
10
—
Copying
dbx-Encoded
and
Non-Encoded
Tapes
with
a
Preamp
having
Two
Tape
Monitor
Loops.