Diamond Amplification MAC-2 - Manual (Page 17)

To copy your settings from the computer back to your MAC-2, connect
the MAC-2’s MIDI In jack to the computer’s MIDI output. Make sure
the MAC-2 is on. Using your SysEx program, load your settings and
send them to the MAC-2. The MAC-2’s LEDs will flash briefly. Once
this is done, disconnect power to the MAC-2, wait a second, then
reconnect power. The MAC-2 will now be using its new settings.
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