RJM Mastermind GT/10, User Manual, Page: 12 / 73

4
Rear Panel Connections (right side)
Remote In
– This is a MIDI input port. It can be used for receiving MIDI patch data, program changes or can be used to
connect multiple Mastermind GTs together and allow them to control each other. This is a 7-pin MIDI port, but you can
always use a standard 5-pin MIDI cable to connect to this port.
MIDI Out – This is the main MIDI output. Connect this port to the MIDI device(s) you wish to control. You can use a
standard 5-pin MIDI cable here, but if you connect a 7-pin MIDI cable, you can phantom power the Mastermind GT over
the MIDI cable. If you phantom power, you can use the Mastermind GT without it needing its own power supply. Please
refer to the note below for more details.
Accessory Power Out – These two power output ports provide 9VDC center negative power for powering tuners, wah
pedals and the like. The outputs can deliver 100mA total. This is enough to power a typical wah pedal and any of the
popular pedalboard tuners.
Power Inputs – This is the main power input for the Mastermind GT. The Mastermind GT requires a 12VDC supply with
at least 2A of current capacity. NOTE: Do not connect power to this jack if you are phantom powering the Mastermind GT!
Remote In (XLR) – (Mastermind GT/22 only) This is a second MIDI input port that works the same way as the other
Remote In. This one has a 6-pin female XLR connector designed to connect to another Mastermind GT. Do not use the
XLR and the standard DIN MIDI inputs at the same time! Doing so can cause unpredictable results.
MIDI Out (XLR) – (Mastermind GT/22 only) This is a second MIDI output port that is wired in parallel with the other MIDI
Out port. This one has a 6-pin male XLR connector designed to connect to RJM Music products such as the Effect Gizmo
and Rack Gizmo, or another Mastermind GT.
Do not use the XLR and the standard DIN MIDI outputs at the same time!
Doing so can cause unpredictable results. This jack also accepts phantom power from a compatible device.
IMPORTANT NOTES ON PHANTOM POWER:
Don’t connect a power supply to the Mastermind GT if you are phantom
powering it! Doing so can damage the Mastermind GT and/or connected devices! Also, before attempting to phantom
power the Mastermind GT, please make sure the device you’re connecting to is compatible. The device must provide 12
volts DC or 9 volts AC over pins 6 and 7 of the MIDI cable (or pins 1 and 2 of the 6-pin XLR connector), and must be able
to handle the current draw of the Mastermind GT.
Expression Pedals
1 2 3 4 USB A
(to device)
USB B
(to computer)
External Switches
1/2 3/4
Remote In MIDI Out Accessory Power Out
9VDC 100mA total
MIDI Out Remote In
Power Input
12VDC 2A
Mastermind GT
RJM Music Technology
Note: only phantom power this controller using
approved devices! Please refer to the user’s manual.