My old uk car had speakers behind the seats with grills on the vertical part of the box. My current import tubby everything is aftermarket and I think it probably just had storage bins behind the seats instead.
It does have speakers behind the seats but mounted on planks of wood which tend to fall into the storage bins as soon as you start cornering enthusiasticly 
Now I never realy messed with the old cars speaker setup because it worked well enough for me anyway and i'd rather have the std looking setup.
I know there are some different std speaker setups, but what ones would i need to make it like my old car? It didnt have an extra amp or anything so it wasnt the active setup, but apparently only the active systems had amps behind the seats? It did have an aftermarket headunit when I bought it though?