Studio Technologies 42A 2008 User Manual
Page 11

Model 42A User Guide
Issue 2, February 2008
Studio Technologies, Inc.
Page 11
and four on the front. They are organized 
in groups of two connectors per IFB 
output, one on the back panel and one 
on the front. They are wired in parallel 
(“multed”) and provide access to the 
identical signals.
The needs of the specific application will 
dictate the manner in which the IFB output 
connectors are used. For some applica-
tions, such as in fixed locations or produc-
tion trucks, it may be appropriate to utilize 
only the connectors on the back panel. 
The permanent interface cables, one for 
each IFB circuit, must be terminated with 
3-pin female XLR-type connectors. It’s rec-
ommended for this application that the IFB 
circuits be wired by way of an input/output 
(I/O) connector panel rather than directly 
to user devices. It’s also a good idea for 
the I/O panel to have “mults” (multiple 
connectors) for each of the IFB circuits. 
For troubleshooting purposes it also may 
be useful to have the IFB circuits pass 
through points on an audio patch bay.
When a Model 42A is used in an equip-
ment rack that will move between broad-
cast events it may be desirable to not 
permanently terminate any interconnect-
ing cables to the IFB output connectors. 
In this way the front- and back-panel 
connectors will remain available for show-
specific uses. For example, in a “booth 
package” application the front-panel IFB 
outputs will serve as a convenient location 
to directly connect, using standard flex-
ible microphone-type cables, announcer’s 
consoles, listen-only belt-packs, or other 
user devices.
Figure 4. Detail of back panel showing IFB circuit output connectors
Figure 5. Detail of front panel showing IFB circuit output connectors
