Mcbuddah..the Abltec amps in your M3 600M's use a new technology designed by Patrik Bostrom that utilizes a patented switching technique called phase shift modulation instead of pulse width modulation. Pascal also uses a new patented technology designed by their technical engineer Jesper Hansen called UMAC Class D. Bruno Putzeys with Ncore, Patrik Bostrom with Abletec, and Jesper Hansen with Pascal, have all designed the newest Class D technologies on the market that puts these guys as the current leader's of the newest Class D innovations. I wouldn't worry about your amps, they are excellent designs.