Guys when people use the large ports are they tuning for A HIGH FREQ. OR is it a low one?If it is a high one then why? the question i have is this: If a vehicle determines your freq. why do they tune at a higher freq? are the vehicles out there that have a 60 to 70 hz freq.Why would everone not just tune there rides to a really high freq. for greater output. also why would you want to tune to a really high freq, it seems more and more people are starting to do this. thanx i am really starved for info on this subject after all knowledge is power.