have recently got my ht back up and running and having trouble setting the delay for the surrounds my front speakers are 12 feet away from the sweet spot and the surrounds are 5 feet. im wondering how many feet of delay do i add? because i can not add delay to the surrounds without adding to the fronts(i dont think i need any more delay for the fronts) the dvd player i own is a pioneer dv-687a which then runs to the preamp and so fourth