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 activat-
ed. 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 com-
plete 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 gen-
erated 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.
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Section 1 - Startup
J-12 Owner’s Manual
