Speck Electronics MicPre 5.0 - Manual (Page 28)

The MP 5.0 provides balanced TRS insert send and return jacks for
line level interstage access after the mic preamp stage and before
the high pass filter section.
The insert jacks may be used to connect limiters or equalizers. The
Insert Send jacks are wired as shown below in Figure 10.
Do not use the Insert Send (Pre Out-B) with an unbalanced input.
When wiring unbalanced cables and connectors, care must be
taken not to connect the low terminal (ring) to ground.
Any unbalanced ¼" plug interfaced to this jack should be wired
according to the diagram shown below in Figure 11.
The insert send and insert return serve a
dual purpose on the MP 5.0. The insert
send may be used as Pre Out-B. This
signal is identical to the main pre out
except it is "active-balanced" and is not
affected by the Xfmr/Active switch on
the front panel.
The insert return may be used as a
balanced Line In for routing a signal to
the mix section.
Split Signal Path
The MP 5.0 has the ability to split into two discrete signal paths;
A mic or D.I. to the main XL output, and a line in signal to the
left/right mix outputs. The O.S.P. switch must be set to the
"Direct" position to use a split signal path on the MP 5.0.
20. Pre Out-B and
Line In jacks
19. Insert Send and
Insert Return jacks
HIGH HIGH
LOW LOW
GROUND GROUND
TIP TIP
RING RING
SLEEVE SLEEVE
Figure 10. Wiring for insert send and return jacks
Chapter 3 Operation Section 22
MIX LEFT
INSERT RTN
PRE OUT-B
INSERT SEND
LINE IN
MIX RIGHT
OR
19 & 20
21
Wiring the MP 5.0
to unbalanced inputs
Figure 11. Unbalanced wiring for TRS outputs
Shield
To MP 5.0 output jack To unbalanced input
Do not connect
ring terminal