Stress Factor 9 is a crossover thrash metal band from Vancouver, formed in 2004. SF9's members include frontman Randy Rampage (founder of the hardcore band D.O.A.) and drummer Ray Hartmann (of thrash metal band Annihilator.) Other members include Duane Chaos (22nd Century, Ace Koden, Driven Force, Centerfold, Smash Alice), Kick and Frank Fright. The Past :
Randy Rampage was a founding member of world-known original punk legends D.O.A. with drummer Chuck Biscuits (later to Danzig).