COMP OUT
MIX 1 OUT
TAPE 1 IN
Figure 5. Arrows indicate direction of signal flow. After plugging the compressor's input and output into the rear jacks of
patch-bay Channel 9, we have created a Compressor "source" at the top-front jack of Channel 9, and a Compressor
"load" (input) at the bottom-front jack of Channel 9. Therefore, using short patch cables as shown above, we have
created the following signal path: Mixer's Output to Compressor's Input, and Compressor's Output to Recorder's Input. So
the signal from Channel One at the Mixer will now be compressed before recording.
Note also, that Patch-bay Channel One is set for HALF-NORMALLED, meaning that with nothing plugged into the bottom-
front jack for that channel, signal will continue from the mixer to the recorder. But when we plug in the patch cables as
above, signal is diverted first to the Compressor and then back to the Recorder. The Compressor's patch-bay channel
however, is set for DE-NORMALLED, so that we won't create an unwanted loop from the Compressor's outputs to its own
inputs when cables are removed from the patch bay's front panel.
Set for Half-Normalled
Set for De-Normalled
Figure 5
6
MIX 2 OUT
MIX 3 OUT
MIX 4 OUT
MIX 5 OUT
MIX 6 OUT
MIX 7 OUT
MIX 8 OUT
TAPE 1 IN
TAPE 3 IN
TAPE 4 IN
TAPE 5 IN
TAPE 6 IN
TAPE 7 IN
TAPE 8 IN
tion, including all outboard reverbs, delays, compres-
sors and other signal processors, can have its own
patch-bay channel, allowing easy connections to any
other piece of gear. Studios with large mixing
consoles, multiple reocrders and dozens of pieces of
outboard equipment require more than one patch bay
to meet their needs. Multiple bays are usually racked
one-above-the-other in a single rack so that short
patch cables can reach all front-panel ins and outs.
Balanced/Unbalanced
The PHB-265 is an UNBALANCED patch bay when
used in the Half-Normalled or Full-Normalled configu-
rations. But it can be used as a BALANCED bay in
the Open or De-Normalled configuration only (with
the switch in the center position).
"Balanced" audio connections have three conductors
representing positive, negative and ground. Audio
signal is kept separate from the ground conductor in
such connections. "Unbalanced" audio connections
allow the ground to "share" the negative conductor
and are transmitted through cables and jacks having
only two conductors.
If you intend to use the PHB-265's full-normalled or
half-normalled configurations with balanced audio
gear, you should use a cable that "unbalances" the
signal before it gets to the bay:
Figure 6
a. Incoming signal
b. Incoming/Outgoing signal
Figure 6a. For signals coming into the bay from balanced
equipment that features XLR outputs, use a cable like
Hosa's PXF-100 series, which "unbalances" the signal
(ground "shares" the negative conductor) for use with the
PHB-265 when using the half-normalled or full-normalled
configurations.
Connections
Hosa PXF-100 Series Cables
Hosa CPP-100 SERIES
Figure 6b. For signals entering or leaving the bay and
connecting to balanced equipment that features balanced
1/4" (Tip, Ring, Sleeve) jacks, use a cable like Hosa's
PXM-100 series which "unbalances" the signal, allowing
ground to "share" the negative conductor.
COMP IN
