i think it also matters about where the stock speaker location is in the rear, becuase in my explorer, with the back speakers on or off, i honestly cannot hear a difference. and when i sit in the back with the fade set evenly for the front and rear, the music in the back seat sounds HORRIBLE. it like completely drowns out the sound coming from the front speakers, and it really sounds horrible to the ears. its just becuase the location of the stock speakers in my 97 explorer ****...i just ordered some diamond d661's and im gonna have them in the kicks, and getting another set(from the member above me) for my front doors.