shocks and springs

if you want an even height, you're notgoing to get one from lowering springs, especially if you have a backdrop problem, just get some tokico struts and some groundcontrol coilovers which allow you to adjust your ride height

shocks and springs

my 01 corolla s always sat low in the back now even worse with the dual 10inch supwoofers in the back along with the battery should I go with springs that lower the front more then the back an if so who makes them also can u just match up any set of springs with just any shocks what pairs with what also whats better to spend the most money on springs or shocks?

you could run a higher spring rate, such as a TRD, and you may see less of a sag in the rear..

Well you're not going to get a perfect match between spring and damper rates unless you buy some real coilover, like Teins. Besides what slvr2000fdvspec suggested though, I'd just say to get a lighter sub enclosure.