A Harman International Company
User’s Guide
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Safety Precautions.........................................................................................................................2
Warranty.......................................................................................................................................2
Quick Start....................................................................................................................................3
Introduction .................................................................................................................................3
Section 1 - Startup
Front Panel Controls and Functions ............................................................................................4
Program/Effect Switches........................................................................................................4
Bank UP/DOWN Bypass/Tuner Footswitches......................................................................4
Bypass Switch.........................................................................................................................4
Continuous Control Expression Pedals.................................................................................4
Rear Panel Connections........................................................................................................4
Control Output......................................................................................................................4
Section 2 - Basic Operation
Using the J-12...............................................................................................................................5
Section 3 - Programming the J-12
Foot Controller.............................................................................................................................6
Table Of Contents
J-12 Owner’s Manual
Safety Precautions
The symbols shown at left are internationally accepted symbols that
warn of potential hazards with electrical products. The lightning flash
with arrowpoint in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an
equilateral triangle indicates that it is necessary for the user to refer to
the owner's manual.
These symbols warn that there are no user serviceable parts inside the unit. Do not open the unit. Do not
attempt to service the unit yourself. Refer all servicing to qualified personnel. Opening the chassis for any
reason will void the manufacturer's warranty. Do not get the J-12 wet. If liquid is spilled on the unit, shut it
off immediately and take it to a dealer for service. Disconnect the equipment during storms to prevent damage.
Warranty
1. The warranty registration card must be mailed within ten days after purchase date to validate this warranty.
2. Johnson Amplification warrants this product, when used solely within the U.S., to be free from defects in
materials and workmanship under normal use and service.
3. Johnson Amplification liability under this warranty is limited to repairing or replacing defective materials
that show evidence of defect, provided the product is returned to Johnson Amplification WITH RETURN
AUTHORIZATION, where all parts and labor will be covered up to a period of one year. A Return
Authorization number may be obtained from Johnson Amplification by telephone. The company shall not be
liable for any consequential damage as a result of the product's use in any circuit or assembly.
4. Proof-of-purchase is considered to be the burden of the consumer.
5. Johnson Amplification reserves the right to make changes in design or make additions to or improvements
upon this product without incurring any obligation to install the same on products previously manufactured.
6. The foregoing is in lieu of all other warranties, expressed or implied, and Johnson Amplification neither
assumes nor authorizes any person to assume for it any obligation or liability in connection with the sale of
this product. In no event shall Johnson Amplification or its dealers be liable for special or consequential damages or from any delay in the performance of this warranty due to causes beyond their control.
Johnson Amplification™ is a registered trademark of The Harman Music Group.
The information contained in this manual is subject to change at any time without notification. Some information contained in this manual may also be inaccurate due to undocumented changes in the product or operating system since this version of the manual was completed. The information contained in this version of the
owner's manual supersedes all previous versions.
CAUTION
ATTENTION:
RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
RISK OF ELECTRIC SHOCK
DO NOT OPEN
2
J-12 Owner’s Manual
Quick Start
For those of you who prefer to burn now and read later, we've included this Quick Start reference section to
help you do it right the first time.
Connect Cables: Make sure the power is off before connecting or disconnecting the cable to the J-12. Using
the included standard 5-pin DIN cable (MIDI-type), connect the J-12 to the jack on the rear panel of the JM
150, JM 250, 2112 SGS, GSP-2101, Valve FX or Legend II where labeled FOOT CONTROLLER. DO NOT
CONNECT ANYTHING BUT THE J-12 TO THE FOOT CONTROLLER JACK ON THE REAR
PANEL OF THE JM 150, JH 250, 2112 SGS, GSP-2101, VALVE FX OR LEGEND II! DOING
OTHERWISE MAY DAMAGE THE DEVICE. IF MIDI CONTROL IS DESIRED, CONNECT THE
MIDI DEVICE(S) TO THE MIDI IN JACK.
Apply Power: When you turn on the JM 150, JH250, 2112 SGS, GSP-2101, Valve FX or Legend II, the foot
controller will also power up.
Select Program : Begin playing your guitar and choose any program using the footswitches or (2101, Valve
FX or Legend II only), by pressing the Program footswitch once and then entering the desired program num-
ber using the number footswitches. Once the program has been selected, the unit will change to that program.
Select Bank (JM 150, JH 250, 2112 Only): You can scroll through the 19 Banks of the JM 150, JH 250,
2112 by simply pressing either the <Bank Up> or <Bank Down> footswitch on the J-12. Once a bank is
selected, press one of the flashing footswitches and the 2112 will move to the selected bank.
Introduction
Congratulations, and thank you for your purchase of the J-12 Foot Controller. The J-12 is a powerful remote
foot controller that allows you to take full advantage of all the high-performance real-time control capabilities
of the Johnson Amplification JM 150, JH 250 Integrated Modeling Amplifier. The J-12 Foot Controller can
also be used with the Digitech 2112 SGS, GSP-2101, Valve FX or Legend II Guitar Processors. The unit is
equipped with ten programmable footswitches, plus dedicated bypass and Program / Bank selector switches,
along with two built-in expression pedals.
This owner's manual is your key to understanding the powerful world of the J-12. Read it carefully. After
you've had time to familiarize yourself with the unit, try experimenting with unusual continuous controller
Parameter links. You may get some interesting results. Johnson Amplification is always looking for new ideas,
so if you feel that you’ve created something unique, send us your ideas at the address on the back cover of this
manual. Good luck, and thank you for choosing Johnson Amplification.
3
Quick Start and Introduction
J-12 Owner’s Manual
Section 1 - Startup
Front Panel Controls and Functions
The front panel of the J-12 consists of a 20 character vacuum-fluorescent display, ten programmable
footswitches, a dedicated bypass footswitch, a Select switch, and two built-in expression pedals.
• Program Switches - Each programmable switch has a number (0-9) and can be programmed to function
in one of several ways.
• Bank Up/ (Hold) Tuner switch - This switch lets you move up through the Bank menu and select
Banks simply pressing the footswitch once. Successive presses will move down to the next Bank. When
the desired Bank is reached, press any of the flashing footswitches and the selected Bank will be activated. When you press and hold the footswitch, the J-12 will put the 2112 in Tuner mode.
• Bank Down/ (Hold) Bypass switch - This switch lets you move down through the Bank menu and
select Banks simply pressing the footswitch once. Successive presses will move to the next bank. When
the desired banks is reached, press any one of the flashing footswitches and the selected Bank will be
activated. When you press and hold the footswitch, the J-12 will put the JM 150 and JM 250 in Bypass
mode.
• Continuous Control Pedals - Real-time control of any Parameter in the 2112 SGS, GSP-2101, Valve
FX or Legend II can be accomplished by using the two built-in continuous controller pedals. For complete information on Continuous Controller assignments, please refer to the original Owner's Manual
shipped with the Johnson Amplification JM 150, JM 250, the Digitech 2112 SGS, GSP-2101, Valve FX
or Legend II.
Rear Panel Connections
The rear panel of the J-12 consists of the control output (for use with the Johnson Amplification JM 150 and
250 , The Digitech 2112 SGS, GSP-2101, Valve FX or Legend II only)
• Control Output - The Control Output is a 5-pin DIN connector (MIDI-type). All control information generated by the J-12 is sent out the Control Output to the Johnson Amplification JM 150 and 250, The
Digitech 2112 SGS, GSP-2101, Valve FX or Legend II. The J-12 also gets its power from the Johnson
Amplification JM 150 and 250, The Digitech 2112 SGS, GSP-2101, Valve FX or Legend II down this cable,
eliminating the need for a separate power supply for the foot controller.
4
Section 1 - Startup
J-12 Owner’s Manual
IMPORTANT: The Control Output is not a MIDI output, and should not be connected to anything but the dedicated Foot Controller connector on the Johnson Amplification JM 150 and 250,
The Digitech 2112 SGS, GSP-2101, Valve FX or Legend II.
Section 2 - Basic Operation
Using the J-12
Following is a basic step-by-step procedure on how to connect and use the J-12 with your 2112 SGS, GSP-2101,
Valve FX or Legend II.
• Make sure the power to your Johnson Amplification JM 150 JM 250, Digitech 2112 SGS, GSP-2101, Valve
FX or Legend II is off.
• Using a standard 5-pin DIN cable (MIDI-type), connect the Control Output to the Foot Controller input
on the rear panel of the Johnson Amplification JM 150, JM 250, Digitech 2112 SGS, GSP-2101, Valve FX
or Legend II.
WARNING: Do not connect devices other than the J-12 to the Foot Controller connector on the rear
panel of the Johnson Amplification JM 150, JM 250 Digitech 2112 SGS, GSP-2101, Valve FX or Legend
II. This is not a MIDI connection. Connecting devices other than the J-12 to the Foot Controller connector may damage the device.
• When the J-12 is connected, turn the Johnson Amplification JM 150, JM 250, Digitech 2112 SGS, GSP2101, Valve FX or Legend II’s power switch on. Both the signal processor/preamp and the J-12 will begin
their power-up initialization sequences. When initialization is complete, the J-12’s display will show the
number and name of the currently selected Program on the Johnson Amplification JM 150, 250, Digitech
2112 SGS, GSP-2101, Valve FX or Legend II.
• To change Programs within the currently selected Bank, press one of the numbered Patch switches on the
pedalboard. The display will change to reflect the name and number of the newly selected Program.
•GSP 2101, Valve FX or Legend II only To recall any Program number, press the Program / Bank Selector
switch once and use the 0-9 pedals to enter the number of the Program you want. If the Program number you
want is lower than 100, you must press the Program / Bank Selector switch again after the number has been
entered. This tells the GSP-2101, Valve FX or Legend II that you are finished entering numbers and to initiate the change.
• GSP 2101, Valve FX or Legend II only To change Banks (a Bank is a group of Programs accessed using
only the 0-9 pedals), press the Program / Bank Selector switch (the top right switch on the pedalboard)twice.
The display of the J-12 reads: BANK NUMBER X. X indicates the currently selected Bank number.
• To select a Program in the new Bank press a footswitch (0-9).
• The CC pedal is set from the factory to control at least one Parameter in almost every Program in the 2112
SGS, GSP-2101, Valve FX or Legend II. Try it in each new Program to find out what it does.
5
Section 2 - Basic Operation
J-12 Owner’s Manual
Section 3 - Programming the J-12
All programming and setup for the J-12 is performed from the front panel of the Johnson Amplification JM 150,
JM 250, Digitech 2112 SGS, GSP-2101, Valve FX or Legend II. Most of the setup menus that deal with the J-12
can be found in the Foot Controller section of the Utility setup menu.
For complete infomation of how the J-12 interacts with the 2112 SGS, GSP-2101, Valve FX or Legend II it will be
necessary to refer to the original Owner's Manual shipped with each product. Although the features and functions
are common in these three products, their procedures for setup vary slightly from product to product.
The first time the Contol One is connected to the GSP-2101, Valve FX or Legend II it will be necessary to calibrate the CC pedal to function correctly. This function can be found by pressing the <UTILITY> button once on
the GSP-2101, Valve FX or Legend II. Please refer to the GSP-2101, Valve FX or Legend II's Owner's manual for
further instructions.
The Johnson Amplification JM 150 JM 250 and the Digitech 2112 SGS will automatically calibrate the J-12 when
connection is made.
6
Section 3 - Programming the J-12
J-12 Owner’s Manual
8760 South Sandy Parkway
Sandy, Utah, 84070
Telephone (801) 566-8800
FAX (801) 566-7005
International Distribution:
3 Overlook Drive Unit 4
Amherst, New Hampshire 03031 U.S.A.
FAX (603) 672-4246
Johnson Amplification™is a registered trademark
of the Harman Music Group
Copyright © 1997
Johnson Amplification
Printed In U.S.A. 10/97
Manufactured in the U.S.A.
J-12 18-0620-A
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