Joe Martin said:You're both wrong. But thanker was closer
If it were Geddy Lee Growl x Ashdown Growl it would = Growl^2.
But since it's Geddy Lee Growl + Ashdown Growl it would = 2(growl) or growl x 2 or whatever floats your mathematical boat.
Sorry about going off topic, but yes ,defiantely get a new amp first.
I know, the "x" in my equation is redundent... Just put it there for the "Laymen"!!!