Accessories

This is a replacement set of 4 rubber feet for the Mastermind GT 10, 16 and 22. Includes 4 rubber feet and 4 8-32 screws for mounting.  

We are out of the Micro Line Mixer. Send an email to support@rjmmusic.com and ask to be notified when these come back in and we will send you a promo code for 10% off.    The Micro Line Mixer is a 4 input stereo mixer that’s small...

This is a MIDI interface specifically for Carol-Ann Amps, and is designed to be an exact replacement for the original model they made. This interface will work with any Carol-Ann amp that has a 3-pin XLR footswitch jack and a 4 or 5 button footswitch...

This footswitch is a replacement for Carol-Ann amplifiers. This 5-button model works with any Carol-Ann amp that originally had a 4 or 5 button footswitch and has a 3-pin XLR footswitch jack. It isn't compatible with any other brand of amp. The...

This footswitch is a replacement for Carol-Ann amplifiers. This 4-button model works with any Carol-Ann amp that originally had a 4 or 5 button footswitch and has a 3-pin XLR footswitch jack. It isn't compatible with any other brand of amp. The...

MULTIBOXES ARE CURRENTLY BEING BUILT AND WILL START SHIPPING AROUND DECEMBER 1   The MultiBox is designed to be a multi-purpose problem solver in MIDI systems. It can be used for any of these purposes, most of them at the same time: MIDI Thru...

This is a replacement LCD display for the small displays over each footswitch in the Mastermind GT. Please note, this is for Mastermind GTs made in mid 2019 or later. If the age of your GT is unknown, you can confirm by opening it up. If the LCDs have...

This is a replacement switch assembly for the Mastermind GT 10, 16 and 22. Replacing switches requires no soldering - they plug into the circuit board, and replacing switches does not void your warranty.  THIS MODEL IS INTENDED FOR MASTERMIND GTs...

This is a replacement LCD assembly for the Mastermind PBC/10 and Mastermind LT (not the PBC/6X). The LCD assembly plugs into the main circuit board. Disassembling the Mastermind is required, but no soldering is needed in order to replace it. Includes...

WE RARELY sell units with Carling Heavy Duty Switches in them. If you don't know what Carling switches are - then these are probably not what you need. Look at MMGT-SA2   This is a replacement switch assembly for the Mastermind GT 10, 16 and 22...

This replacement switch button is for the original Mastermind, Mastermind LT and Mastermind PBC products and can be used to replace broken switches. Replacement requires disassembling the product, but does not require soldering.  This video...

This is a replacement switch assembly for the Mastermind GT 10, 16 and 22. Replacing switches requires no soldering - they plug into the circuit board, and replacing switches does not void your warranty.   THIS MODEL IS INTENDED FOR MASTERMIND GTs...