EMG BTC CONTROL Service manual

High Frequency
Selection dip-switch
Treble Control
Bass Control
0230-0206B
SPECIFICATIONS
Input Impedance (Ohms) 1 MegOhm
Gain/Attenuation/ Frequency Bass Control +/-12db/20Hz
Gain/Attenuation/ Frequency Teble Control +/-12db/(Adjustable)
Input Referred Noise -120dbV
Output Impedance (Ohms) 2K
Recommended Supply Voltage 18 Volts
Current @ 9V/18V (Microamps) 600/740
Battery Life (Hours) 750
Maximum Supply (Volts DC) 27 Volts
INSTALLATION INFORMATION
EMG MODEL: BTC CONTROL
(ACTIVE / PASSIVE PICKUP INPUT)
General Operation
The BTC Control is a 2-band equalizer for Bass guitar. The BTC features single-pole filters for broadband equalization. Often the broader
single-pole filters are preferred for musical instruments because they are less selective, easier on the ear, and sound more “musical”. One of
the features of the BTC Control is a 2-position dip-switch that controls the slope of the high frequency response. By choosing one of the four
combinations the high frequency response can be tailored to your liking. The BTC Control has a high input impedance and can be used with active
or passive pickups. Bass and Treble controls are mounted on a concentric shaft and knobs are included.
Dimensions:
BTC (Bass/Treble)
Equalizer
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.
PO BOX 4394
SANTA ROSA, CA
95402 USA
P [phone]
F [phone]
EMGPICKUPS.COM
INCLUDED:
1 BTC Control
1 Set Concentric Knobs
1 Battery Clip with Buss Connector
1 Stereo Output Jack (Battery Switching)
4 Interconnect Cables (2 Red, 2 White)
.937
(24)
.538
(14)
.392
(10)
1.813
(46)
1.000
(25.4)
.875
(22.2)
6 x 9mm
D Shaft
8 x 4mm
9 x 9mm
P .75
.077 x .077 Slot
(2mm)
.875
(22.2)
INPUT
GROUND
GROUND
OUTPUT
VOLTS +
Battery Power:
If you play the instrument very hard, and are boosting the bass or treble with the BTS, you should consider operating the instrument on +18
Volts (2 Batteries in series, see page 4). If you play mildly and use a minimum of boost the instrument should operate easily on a single 9-Volt
battery. Use an Alkaline or Lithium battery for the best battery life and always unplug your guitar when you’re not using it.

BTC CONTROL (BASS BOOST & CUT RESPONSE)
BTC CONTROL (TREBLE RESPONSE: ON/ON)
BTC CONTROL (TREBLE RESPONSE: 1 OFF/2 ON)
BTC CONTROL (TREBLE RESPONSE: 1 ON/2 OFF)
BTC CONTROL (TREBLE RESPONSE: 1 OFF/2 OFF)
- 9V +
VOLUME
OUTPUT
T
R
S
OUTPUT CABLE
NOTE REVERSED
CONNECTOR!
BATTERY
BUSS
10KHz
1KHz
20Hz
10 dB/div
10KHz1KHz
20Hz
10 dB/div
10KHz1KHz20Hz
10KHz1KHz
20Hz
10 dB/div
10KHz1KHz
20Hz
10 dB/div
OFF/OFF
ON/ON ON/OFF
OFF/ON
The BTC Control is easily installed by using the connector cables supplied.
Diagram #1 shows the cables connected to the BTC Control. This 5-pin
layout is the same for all EMG Accessories, so they can be interchanged.
There are a variety of ways instruments can be wired. The examples shown
here are only a few. If your instrument has different wiring than shown here
go to our website: http://www.emgpickups.com for alternate diagrams.
Diagram #2 below shows the installation of a single Volume control along with
the BTC Control.
High Frequency Response Selection:
The BTC has the added feature of allowing you to choose from 4 different
high frequency response curves. This is a nice feature especially if you are
using the BTC with passive pickups. The following diagrams show the dip-switch
positions and the graphs show the resultant frequency response.
The BTC Control is an equalizer style control, offering both boost and cut
at the same frequency locations. The controls feature a center detent (notch)
that lets you know when no equalization is in effect.
RED TO 9V + BUSS
BTC Control Page 2
NOTE REVERSED
INPUT CONNECTOR
OUTPUT TO JACK
INPUT
Installation Instructions:
EMG Model: BTC Control
BTC
CONTROL
Diagram #1
Diagram #2
Master Volume
BTC Control

2 Pickups, 2 Volume controls, BTC Control, no selection switch
J-Bass Style wiring
Refer to Diagram #3
1) Install the Pickups and route the Pickup cables to the control cavity.
If the cables are too long, keep any excess under the pickup.
2) Mount the Volume and Tone controls into the body / pickguard.
Plug the Neck Pickup Cable onto the Neck Volume control.
Plug the Bridge Pickup Cable onto the Bridge Volume control.
3) Plug a coax cable from the Neck Volume control to the Bridge Volume
control.
4) Plug a coax cable from the Bridge Volume control to the BTC Control.
5) Plug the output cable from the BTC Control and connect the output
wires to the output jack by pushing the connectors on as shown.
WHITE wire onto the TIP (T) contact,
BLACK wire onto the SLEEVE (S) contact
BLACK Battery Negative wire onto the RING (R) contact.
6) Plug the RED Wires of the pickups onto the V+ Supply Buss (RED Shroud)
along with the RED of the battery clip.
Extra pins on the V+ Supply Buss are for EMG Accessories.
7) Put the battery in the insulating foam piece provided and place it securely
in the control cavity.
We suggest that you plug in the instrument and test it before closing the
control cavity.
- 9V +
NECK
VOLUME
OUTPUT
T
R
S
OUTPUT CABLE
BRIDGE
VOLUME
NOTE REVERSED
CONNECTOR!
BATTERY
BUSS
BRIDGE PICKUP
NECK PICKUP
BTC Control Page 3
Installation Instructions:
EMG Model: BTC Control
BTC
CONTROL
BTC
CONTROL
BRIDGE PICKUP (POSITION 1)
NECK PICKUP (POSITION 2)
OUTPUT (POSITION 3)
NECK PICKUP
BRIDGE PICKUP
Diagram #4b
2 Pickups
Toggle Style Select Switch
Master Volume & Master Tone
FROM NECK PICKUP
FROM BRIDGE PICKUP
BATTERY
NEG (-)
OUTPUT
T
R
S
Installation (Two Pickup Guitars with Selection switch):
Guitars with two pickups and a selection switch will use the EMG B157 Pickup Buss
shown at the right in Diagram #4a.
The Pickup Buss is a convenient way to wire your guitar without soldering.
There is a separate sheet attached to these instructions that describes the
Pickup Buss in detail.
In all installations it’s best to find a place to mount the Pickup Buss in the control
cavity before starting. Then, after the cables are routed use the velcro to mount it
securely.
OUTPUT CABLE
RED
RED
RED
GROUND
BRIDGE P/U
NECK P/U
OUTPUT
OUTPUT TO MASTER TONE
2 Pickups / Toggle Select Switch / Master Volume and BTC Control
1) Install the Pickups and route the Pickup cables to the control cavity.
If the cables are too long, wind up the excess and keep it under the pickup.
2) Mount the Volume and Tone controls into the body.
Plug both Pickup cables into the Pickup Buss (BLACK Shroud) as shown,
Refer to Diagram #4a
Bridge Pickup to Position 1
Neck Pickup to Position 2.
3) Plug a coax cable from the Pickup Buss (Position 3) to the Master Tone (Active)
as shown in Diagram #4b. Note the reversed connector on pins 1 and 2.
4) Plug a coax cable from the Master Tone (ACTIVE) to the Master Volume as shown.
5) Strip the insulation from the switch wires and Insert them into the GREEN
Terminal Block and tighten the screws with a small screwdriver.
The Bridge pickup goes to the BR Terminal
The Neck pickup goes to the NK Terminal
The Output of the switch goes to the O Terminal
If there is a ground wire coming from the switch, insert it into one of the black
terminals on the terminal block.
6) Plug the output cable onto the Master Volume control and connect the output
wires to the output jack and push the connectors onto the jack as shown.
WHITE wire onto the TIP (T) contact,
BLACK wire onto the SLEEVE (S) contact
BLACK Battery Negative wire onto the RING (R) contact.
7) Plug the RED Wires of the pickups onto the V+ Supply Buss (RED Shroud)
along with the RED of the battery clip, and the RED wire of the Active Tone Control.
Extra pins on the V+ Supply Buss are for EMG Accessories.
8) Put the battery in the insulating foam piece provided and place it securely in the
control cavity.
We suggest that you plug in the instrument and test it before closing the
control cavity.
MASTER
VOLUME
Diagram #4a
- 9V +
NOTE:
REVERSED CONNECTOR
Diagram #3
Volume / Volume
BTC Control

RED WIRES
FROM PICKUPS
EMG Active Neck Pickup
(Upper 3 pin header)
EMG Active Bridge Pickup
(Lower 3 pin header)
MASTER
VOLUME
OUTPUT
BATTERY
NEG (-) BLACK
BATTERY
NEG (-) BLACK
B118
ACTIVE BALANCE
CONTROL
9V+ POWER BUSS
NOTE REVERSED
CONNECTOR!
Diagram #5
ABC Balance Control
Master Volume
BTC Control
Output Jack
RED
RED
RED
NECK
PICKUP
BRIDGE
PICKUP
ABC
CONTROL
BTC
CONTROL
MASTER
VOLUME
OUTPUT
JACK
MASTER VOLUME AND
BTC CONTROL REVERSED
BOTTOM
VIEW
OUTPUT CABLE
T
R
S
- 9V +
Diagram #6
If the instrument has a Battery Holder:
If your instrument has a 9 or 18-Volt battery holder you can still
use the EMG Connectors to supply power to the pickups.
Simply cut and strip the wires from the battery clip provided.
Twist the wires together (Red to Red and Black to Black) and
use the shrink tubing included to cover the connections.
Soldering the wires is recommended.
9/18 VOLT
BATTERY
HOLDER
Cover these connections with the
shrink tubing provided.
BLACK to RING terminal
of the Output Jack
RED to BATTERY OR PICKUP BUSS
BLACK to RING terminal
of the Output Jack
RED TO BATTERY BUSS (+18Volts)
Diagram #7
- 9V +
- 9V +
T
R
S
RED
BLACK
+18 Volt Wiring Option:
If you want to operate your instrument at +18 Volts for more
headroom then use 2 batteries wired as below.
Also, if you are using any type of EQ in your instrument
(EMG-BT, BQ) or anything that boosts the pickup signal then
+18 Volts is recommended.
Solder the Black and Red
wires together and cover
the connection with shrink
tubing, or other insulation.
TIP
RING
SLEEVE
Diagram #8
FROM TONE
OR VOLUME
BATTERY
NEG (-)
RED to BATTERY BUSS
Soldering to the 152B Panel Jack:
If your instrument has a long Panel Jack like the one below
you will have to solder the output cable as shown.
Ground (Black) to the Sleeve
Signal (White) to the Tip
Battery Negative (Black) to the Ring
- 9V +
Diagram #9
13
Soldering to the battery buss:
If your instrument has an older EMG Pickup you can solder the
pickup RED wire to the buss. Simply use some needle nose pliers,
pull out the V+ header and solder the RED Wire from the pickup(s)
to any of the pins and then re-insert the header into the housing.
2
BTC Control Page 4
BTC
CONTROL