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Dimensions:

B122 Volume Control

.650

.965

1.260

.510

.400

CCW W CW

SCHEMATIC NOTES:

The Schematic diagram above shows how the B122 Volume control is configured.

Pins 1 and 2 are the input or output of the CW (Clockwise) terminal of the control. 

Pins 3 and 4 are the input or output of the W (Wiper) terminal of the control.

Pins 5 and 6 are duplicates of  pins 1 and 2, the CW terminal (Clockwise).

Pins 2, 4, and 6 go directly to ground, the CCW (Counter-Clockwise) terminal of the control

SOLID SHAFT

SPLIT SHAFT

      

General Operation

The B122 Volume control is included with each EMG Pickup and Pickup System.  There are two versions, 25K Ohm for Active EMG’s and 500K 

Ohm for EMG-HZ Passive Pickups. The 25K Ohm control has a black PC Board, the 500K has a green PC Board, both are Audio Taper. The wiring 

configuration is the same for both 25K and 500K Controls. There are 6 header pins, (3 pairs of signal and ground) two of the pairs are for 

in/out, the third pair is for tone send or daisy chaining. Examples are shown in the included diagrams. The B122 features plug-in compatibility 

with all EMG Pickup Systems by using .100 (2.54mm) standard pin spacing. You can solder to the input and output of the control by using the 4 

solder pads on the PC Board if connectors are not available, 2 of the solder pads are for input/output and the other 2 pads are for ground.

0230-0161A

INSTALLATION INFORMATION

 

EMG MODEL: 

B122 VOLUME CONTROL

(ACTIVE PICKUP INPUT 25K OHM, BLACK PC BOARD)
(PASSIVE PICKUP INPUT 500K OHM, GREEN PC BOARD) 

 © 2009 Copyright EMG INC. All Rights Reserved.

PO BOX 4394 
SANTA ROSA, CA
95402  USA

P (707) 525-9941
F (707) 575-7046
EMGPICKUPS.COM

1
2
3
4
5
6

Schematic Diagram:

B122 Volume Control

VOLUME

B122rH

IN/OUT

GND

IN/OUT

GND

IN/OUT

GND

CCW

W

CW

1
2
3
4
5
6

SOLDERING:

If you don’t have connector cables, or prefer to solder to the control, 

terminals are provided. The diagram below shows the pads for soldering.

W (WIPER) 
INPUT/OUTPUT

CCW (COUNTER-CLOCKWISE)
GROUND (2 PADS)

CW (CLOCKWISE)
INPUT/OUTPUT

The EMG coax cables for wiring the guitar are a 2-pin pair, 

The signal or “Hot” wire is White, the Ground (Shield) wire is Black.  

8mm Dia.

P.75

A25K

 *HZ VALUE

A500K*

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