Hi plp, I need a system that will puond hard enough to make everyone think there is an earthquake. I need compitition quality for car shows.what do you suggest? If u have any suggetsions or opinions or just any comment plz let me know.i am open to any ideas including how to setup but plz make sure u know what u r talking about if yur gonna post cuz i dont want to end up buying low quality crap.thanx for the help everyone plz let me know what to get.