Shure C121 User Guide

Model C121 Cable Replacement Kit

User Guide

APPLICATIONS

The C121 Cable Replacement Kit consists of a 10 ft
(3 m) length of cable terminated with an XLR connecter on
one end and three wire leads on the other. Use it to replace
the cable on the Microflex A412B microphone base.

INSTALLATION

1. Remove the base back plate by unscrewing the four

screws (A) as shown in Figure 1. Using a soldering iron,
loosen the wire leads from the XLR connector (B) and
detach the old cable.

A

B

Figure 1

2. Remove the old cable and strain relief from the back

plate using a 0022 (R–29) Heyco strain relief assembly
tool. Optionally, you can use a pair of pliers—grip the
plastic strain relief (C) applying pressure on the tab (D)
as shown in Figure 2 and pull out.

NOTE: Do not damage the plastic strain relief.

3. Mount the new cable in the back plate with the plastic
strain relief. Position the plastic strain relief 3/8 in. (1 cm)
from the edge of the cable reinforcement sheath (see
Figure 3) and use the pliers to grip it shut as you insert
it into the back plate.

3/8 in. (1 cm)

Figure 3

4. Solder the wire leads on the new cable to the XLR
connector inside the base. Match the wires as shown in
Figure 4.

RED

BLACK

SHIELD

Figure 4

5. Reassemble the base.

E2002, Shure Incorporated

27B2976 (BA)

D

Figure 2

C

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