EMG MMTW Installation Information

7) SPECIAL NOTE:
The diagrams shown are for EMG Active Pickups.
All diagrams show the Red Wire coming from the pickups
connected to the battery. If you are installing EMG-HZ
Passive Pickups refer to their diagrams. The Red Wire of
the HZ Pickup is NOT for battery power, it is a coil wire.

3.500

MAXIMUM RECOMMENDED STRING WIDTH 2.50"

2.900
R .125 TYP

PO BOX 4394
SANTA ROSA, CA
95402 USA

0230-0146A

P [phone]
F [phone]
EMGPICKUPS.COM

.880

.950

.125 DIA. MOUNTING HOLES

3.700

1.900

R .250 TYP

.770

INSTALLATION INFORMATION
EMG MODEL: MMTW

SPECIFICATIONS: MODEL:

Logo Color Copper
Magnet Type* C/S
Resonant Frequency (KHz) 3.50 2.50
Output Voltage (String) 1.00 2.00
Output Voltage (Strum) 3.00 4.50
Output Noise (60 Hz) -107 -107
Output Impedance (Kohm) 10 10
Current @9V (Microamps) 160
Battery Life (Hours) 1500
Maximum Supply (Volts DC) 27
* Magnet Type CS (Ceramic and Steel)

Installation notes:

The EMG-MMTW has a variety of ways it can be wired into a bass. The diagrams included are limited to the most popular because of space.
The additon of the plug-on PC Board on the Push-Pull Pot adds further flexibility as you will see in the diagrams. We suggest you look fully at the
installation diagrams included in this sheet along with the B157 Pickup Buss data sheet included in this package before beginning your installation.
The Push-Pull Pot allows you 2 options as a volume control and 2 other options using the pot as a tone control. If you don’t see a diagram that
fits your instrument directly, or you want to do something completely different, contact our technical department and we’ll create a diagram you can
follow for your installation. Certain limitations apply...

IMPORTANT INSTALLATION NOTES:

1) Only one 9-Volt battery is required to power the pickups (unless
otherwise recommended) and any accessories such as the SPC,
RPC, EXG, AB, PA-2, and Pi-2.
Use an Alkaline or Lithium battery for longest life.

MMTW Single-Coil Dual-Coil

EMG Pickups are shielded internally and DO NOT require string

grounding. This greatly reduces the possibility of reverse
polarity shock from microphones and other equipment.

EMG-MMTW (SIDE VIEW)

C1

C2

C3

In Dual-coil mode, coils C1 and C2 are active.
In Single-coil mode, coils C2 andC3 are active.

2) The Volume Control included with the EMG System is 25K Ohm.
This value is required for the system to work correctly.

5) EMG Active Pickups have very little magnetism compared to
passive pickups. We recommend you adjust the pickups as
close to the strings as possible. Sustain and string movement

3) A stereo output jack (12B) is included with the EMG Pickups;
it grounds the black battery wire to turn on the pickups when
the plug is inserted into the jack. If you are replacing passive
pickups, make sure to use the jack included. If your guitar has a
long panel jack make sure it is a stereo type, a Switchcraft 152B

will not be inhibited by close adjustment.

6) If your installation is different from the diagrams in these
instructions or you need additional diagrams visit our website:
emgpickups.com for a complete listing of available diagrams.

is recommended.

7) SPECIAL NOTE:

4) When installing any EMG Active Pickup, DO NOT connect the
bridge ground wire. This wire is usually soldered to a volume or
tone control casing and goes to the bridge. This wire grounds the
strings and uses them and your body as a shield against hum and
buzz. It also creates a shock hazard.

The diagrams shown are for EMG Active Pickups.
All diagrams show the Red Wire coming from the pickups
connected to the battery. If you are installing EMG-HZ
Passive Pickups refer to their diagrams. The Red Wire of
the HZ Pickup is NOT for battery power, it is a coil wire.

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.

© 2010 Copyright EMG INC. All Rights Reserved.

Installation Instructions:
EMG Model: MMTW

General Notes:

Every attempt has been made to make this a solderless installation.
There are some instances where this is not possible;

1) If your instrument uses the long panel output jack and you had passive pickups
you will need a new stereo output jack, the Switchcraft 152B is recommended.
Soldering to the new jack will be required.

2) Some instruments may already have a battery holder installed, in that case
soldering may be required.

3) Instruments with two pickups may need soldering to the selection
switch in some installations.

Using the MMTW Push-Pull Switch

The Push-Pull Switch included with the EMG-MMTW allows you to choose between
two internal pickups of the EMG MMTW, single-coil and dual-coil. The Push-Pull Pot
has two separate sections: The Switch and the pot, described below.

Refer to Diagrams #1 and #2

The Push-Pull Switch section (DPDT) lets you choose between the
single-coil sound and a dual-coil sound by pulling or pushing the pot shaft
up or down. You have the option of having the single-coil sound in either
the up or down position and vice-versa for the dual-coil sound.
Diagrams #1 and #2 show how to connect the 35-TW Pickup cable to choose
either option. Select the diagram that suits you and push the cable
connectors onto the single line 6-pin header.
Simply turn over cable connectors 1 and 2 to change the wire order
and this will choose between the two options.
Connector 3 remains the same for either choice.

Diagram #3

PUSH / PULL POT USED AS
THE PICKUP VOLUME CONTROL

PICKUP OUTPUT (H1)

SHUNT ON (H3)

SHUNT ON (H5)

1

2

3

Diagram #1

HUMBUCKING ON: DOWN POSITION
SINGLE COIL ON: UP POSITION

FLIP CONNECTORS 1 AND 2
AS SHOWN

1

2

3

Diagram #2

SINGLE-COIL ON: DOWN POSITION
HUMBUCKING ON: UP POSITION

WIRE ORDER:
WHITE
GREEN
BLUE
YELLOW
ORANGE
SHIELD

WIRE ORDER:
GREEN
WHITE
YELLOW
BLUE
ORANGE
SHIELD

Using the MMTW Push-Pull Pot Section

The Push-Pull Pot side of the EMG-MMTW allows you 4 different options:

1) Use the pot as a Master Volume for the Instrument

2) Use the pot as a Volume control for the MMTW Pickup

3) Use the pot as a Master Tone control for the Instrument

4) Use the pot as a Tone control for the MMTW pickup

On the PC Board there is a dual-line header with 5 pairs of pins. They are
listed on the PC Board as H1 through H5. By using the the connections
shown in Diagrams #3 through #6, you can choose any of the 4 options.

Diagram #4

PUSH / PULL POT USED AS
THE MASTER VOLUME CONTROL
(2 PICKUP GUITARS)

TO TONE CONTROL OR
SELECTION SWITCH (VIA B157 BUSS)

OR TO THE OUTPUT JACK IN SINGLE
PICKUP GUITARS WITH NO TONE
CONTROL

MASTER VOLUME
INPUT (H1)

MASTER VOLUME
OUTPUT (H2)

SHUNT ON (H5)

PICKUP OUTPUT (H4)
TO SELECTION SWITCH
(VIA B157 BUSS)
OR PAN-POT

Using the Pot Section as:

1) A Master Volume for the Instrument or, the Pickup Volume control
Refer to Diagrams #3 and #4

The pot section (25K) can be used either as a Volume control
for the pickup, or it can be used as the Master Volume for the guitar.
Diagrams #3 and #4 show how to connect either option.
Use the dual-line 10-pin header and push the cables on and
install the shunts as needed onto the labeled headers H1 thru H5.

Use Diagram #3 if you have a single MMTW installed in your instrument,
or have two or more pickups in your instrument and want to use the
pot as the Volume control for the MMTW Pickup only.
Installing the shunts on Positions H3 and H5 sends the pickup signal
to the wiper of the 25K Pot, and the output of the 25K Pot is at Position H1.

For two pickup guitars, Diagram #4 allows you to use the 25K Pot independently
of the pickup output. By taking the output of the pickup from Position H4, the
Volume control is now available to use as a Master Volume with H1 and H2 being
the input and/or output of the Volume control. H1 and H2 Positions are
interchangeable.
Position H4, now the output of the pickup, would typically go to a selection switch
or a pan-pot. Don’t forget to install the shunt on H5.

MMTW INSTRUCTIONS Page 2