Originally Posted by picaflor

Right now I have a temporary sub box there with only one 8" kicker, and is also with speaker facing up like in this setting. Problem is, all the metal inside the rear seat also vibrates with some songs and it affects the sound.
My conclusion is that I have to install a box with speaker facing down or front. Not up. For better sound.
And the speakers that you mention I don't know but their requirements cubic feet wise, will make them fit in that 3 speaker box you indicated.