Hardware manual

Crest Audio Inc. NexSys v. 3.0
Control Hierarchy Diagram
9.5 Solo Safety
During system testing it is often useful to solo a particular amplifier
channel. However, during a performance, soloing one amp channel
and muting all others is generally not a good thing to do. Enabling
the solo safety prevents amplifiers from accidentally being soloed.
Solo safety can be toggled on and off by selecting O
ptions | Solo
Safety from the menu.
Solo Safety Toggle
Software Manual Page 9.5