Id agree... 600W would be what they call PMPO (stands for something to do with peak power LOL!) So basically... If you run that sub at a constant 600W you will shorten the life span of it dramatically! The 400W amp is heaps enough for it.... Or you could harden the eff up and get a 1200W Hertz setup HAHAHAHAHHA!! Jks man.... Sounds like you are gonna get some sweet beats comin out of that system!!!