Working on a rc hobby trailer been a while since I done any car audio... Any ways pioneer head unit.. 2 6.5 pioneer up front... 2 2way pioneer 6x9 in back... on a dual 400 watt amp.. So if my memory serves me right with a two way speaker I just get mids and bass correct?.... So of I switch to a pioneer 6x9 4way.. I get it all right???? Here is a pic of my project