EMG B125 ACTIVE BALANCE CONTROL Installation Instructions Manual

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INSTALLATION INFORMATION
EMG MODEL: B125 ACTIVE BALANCE CONTROL / (ABC)

(PASSIVE/ACTIVE PICKUP INPUT)

SPECIFICATIONS

Input Impedance (Ohms) 200K
Input Referred Noise -130dbV
Output Impedance (Ohms) 2K
Current @ 9V (Microamps) 600
Battery Life (Hours) 750
Maximum Supply (Volts DC) 18

General Operation

The B125 Active Balance Control (ABC) is used to pan between two EMG-HZ pickups rather than use a selection switch. The B125 features input

buffer amps for each pickup, so if you have 2 Passive Pickups, 2 Active EMG Pickups, or are mixing an active with a passive pickup you can use

the B125 Active Balance control. Pickups can be connected by connectors or hand soldered to the PC board. The control has a center detent

(click) in its rotation.

INCLUDED:

1 B125 ABC Control
1 25K Solid Shaft Pot (Master Volume)*
1 Battery Clip with Buss Connector*
1 Stereo Output Jack (Battery Switching)*
2 Interconnect Cables (1 Red, 1 White)

* Included with your EMG Pickup.

Installation notes:

The output impedance of the ABC is low, so the existing high resistance volume and tone controls will not work when placed after the ABC.

The active tone control (VLPF) is required for tone. Any of the EMG Accessories like the EXB, BTC or BTS Controls, BQC or BQS Controls, or

OEM Models B30eq or B64eq can be added as well.

.236 (6mm)

.309 (8mm P .75)

1.00

Input (Bridge Pickup)
Ground (Bridge Pickup)
V+ (Bridge Pickup)

Input (Neck Pickup)
Ground (Neck Pickup)
V+ (Neck Pickup)

Dimensions:
B125 Active Balance
(ABC)

1.79

.974

.393

.393

1.00

Output
Ground
V+

Warranty

All EMG Pickups and accessories are warranted for a period of two years. This warranty does not cover failure due to improper installation, abuse or damage. If
upon examination the pickup is determined to be defective, a replacement will be made. Warranty replacement products are covered by this same warranty. This
warranty covers only those pickups and accessories sold by authorized EMG Dealers. This warranty is not transferable.

© 2008 Copyright EMG INC. All Rights Reserved.

Installation Instructions:
EMG Model: B125 ABC (Active Balance Control)

.

Existing EMG-HZ Passive Pickup installations:

If you already have EMG-HZ Pickups in your instrument you can use
the existing pickup cables or you can use the new plug-in cables provided.
The new cables are pre-wired to use the pickup in the humbucking mode.
If you are using a coil-tap switch, or a phase switch, use the existing
cables and use the hand soldered method for installation (see below).

Diagrams 1, 2, and 3 illustrate how to connect the pickups to the ABC Control
by using the EMG Plug-in connectors. Diagrams 4, 5, and 6 show how to solder
the pickups to the PC Board. The output of the ABC is then illustrated in diagrams
on page 4 in a variety of configurations.

Diagram #1
EMG-HZ Plug-in Inputs & Output

Pin 1
This pin and the one below it supply 9V+ for EMG Active Pickups:

DO NOT use either pin when using passive pickups.

Pin 2 Ground for pickup

Pin 3 Input for pickup

Mixing EMG-HZ or other Passive Pickups and EMG Active Pickups:

Use either the Plug-in connector for an EMG-HZ (shown below)
or hand solder any passive pickup to the PC Board using the solder
pads provided. The EMG Active Pickup can be plugged into the chosen
3 pin input header or its cable can be soldered to the PC Board.
The Red wire (9V+) of the EMG should be plugged onto Pin 1 of the ABC
as shown or soldered to the buss connector as shown on page 3.

Diagram #2
EMG-HZ Plug-in Input (Bridge Pickup)
EMG Active Pickup Input (Neck Pickup)

Pin 3 Input for pickup

Pin 2 Ground for pickup

Pin 1 Voltage (9V+) for Active Pickups

EMG Active Neck Pickup
(Upper 3 pin header)

NECK PICKUP (White tubing)
(Upper 3 pin header)

BRIDGE PICKUP (Black tubing)
(Lower 3 pin header)

RED TO 9V + BUSS

See any EMG-HZ Data Sheet
for the coil / color codes

TO VOLUME CONTROL

EMG-HZ Wire Order:
Pin 1 Green (GRN)
Pin 2 White (WHT)
Pin 3 Braid (GND)
Pin 4 Red (RED)
Pin 5 Black (BLK)

EMG-HZ Bridge Pickup (Black tubing)
(Lower 3 pin header)

RED TO 9V + BUSS

Diagram #3

EMG Active Pickup Inputs:

Pin 2 Ground for pickup

Pin 1 Voltage (9V+) for Active Pickups

EMG Active Neck Pickup
(Upper 3 pin header)

EMG Active Bridge Pickup
(Lower 3 pin header)

TO VOLUME CONTROL

Pin 3 Input for pickup

B125 Page 2

The RED Wire of the EMG-HZ Pickup is a coil wire. It is
the signal output (hot) wire. DO NOT hook this wire to 9V+
or you will be sorry. Really sorry! If you are installing new
EMG-HZ Passive Pickups refer to those data sheets.

OUTPUT

RED TO 9V + BUSS