ok, very likely you don't exceed more than 1/4 average of the amp power.I prefer amps that don't cut out while going into self-protection. I have several amps that can cover clean through vintage warmth depending on the gig.
Something must have been wrong with this amp in particular that went into protection mode.
It may also be that someting is wrong with your cabinatry. Different amps react different on failure modes.
