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Model RK100PK and RK100PKW Microflex® 

Preamplfier Kit User Guide

27A3252 (Rev. 1)

Printed in U.S.A.

©2007, Shure Incorporated

INSTALLATION - RK100PK (BLACK), RK100PKW (WHITE)

The  RK100PK  and  RK100PKW  preamp  comes  assembled  for 

use with microphones using a miniature 4-pin connector. To wire a 

microphone cable directly to the preamp, follow these instructions:

Turn screw (A) counter-clockwise until it recedes below 

the case.
Remove the cap (C) by removing the set screw (B) with 

the provided hex wrench (.05 in.).

FIGURE 1

Push the circuit board out from the case interior to expose 

the black and red wires (D).
Unsolder the wires from the circuit board (E).

FIGURE 2

1.

2.

3.

4.

Insert the rubber flex relief (G) into the cap (C) and feed 

through the microphone cabling.

Note:

 You will need to reuse the rubber flex relief from your old 

preamp. If the rubber flex relief is unavailable, please contact the 

Shure Service Department.

FIGURE 3

Solder the wires directly back onto the circuit board. 

Match wires as marked on the circuit board using the fol-

lowing key:

R = RED

B = BLACK

S = (GROUND) SHIELD

R
B
S

R

FIGURE 4

Push  the  circuit  board  back  into  the  case,  making  sure 

that  the  set  screw  (A)  is  lined  up  with  the  screw  hole  in 

the  side  of  the  case  (if  the  circuit  board  does  not  go  in 

all  the  way,  twist  it  slightly  until  the  screw  and  hole  are 

aligned).  Raise  the  set  screw  (A)  by  turning  clockwise 

so  that  the  preamplifier  is  held  securely  in  place.  Screw 

on  the  cap  (C).  Do  not  use  the  set  screw  with  the  cap.

5.

6.

7.

C

B

A

F

D

E

G

C

SHURE Incorporated  http://www.shure.com

United States, Canada, Latin America, Caribbean:

5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.

Phone: 847-600-2000  U.S. Fax: 847-600-1212  Int’l Fax: 847-600-6446

Europe, Middle East, Africa:

Shure Europe GmbH, Phone: 49-7131-72140  Fax: 49-7131-721414

Asia, Pacific:

Shure Asia Limited, Phone: 852-2893-4290  Fax: 852-2893-4055

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