Originally Posted by
Drifter995
You'd probably want a spacer anyway, most stock speakers are pretty shallow, and getting aftermarket ones, depending on the brand and price, can be anywhere from too deep to nice and shallow.
Either way, hit up your local car store, I think frankston car audio may be close as it's gonna get for mea sponsored/ recommended.. dunno about others, but eh.
Go to a store, tell them your car, that you plan on just running a headunit and speakers, so you want something efficient, that'll give you nice bass and sound good. They should (if they know what they are talking about) point you towards some nicer speakers. Then just audition them, see if you like the sound, and once you find one you like the sound of, buy them and install them. if you don't plan on using an amp at any point in time, any headunit will suffice... just get what works for you, looks nice to you and is easy for you to use.
And to answer your question, a good pair of splits up the front is all you need to get it sounding good. Example everyone uses: When you go to a concert, the bands sound comes from infront of you, not behind you, that is what you want to aim for; as if the band was right on your bonnet, playing just for you. So in most cases, your rears will be faded out, unless you love your rear fill. (by rear fill, I don't mean bass... I mean mid-high range.. a sub'd be fine up back, etc)
So basically, shop around for some decent splits in your price range, see if they sound nice. if they do, buy them, and install them. ezpz.
If you want to get more serious, think about amps, subs, sub boxes, pricier headunits, wiring, batteries, etc etc... For decent car audio, it can cost you a lot.. my previous car cost me in excess of 4k including install... and that was entry level gear... the current car is still pretty entry level gear, but with a few more pricey bits, and without install, so far it's cost me about 2-3k... with installs, probably looking at about 6k if I don't do it all myself >.> lots of work in it... (gotta make speaker pods, parcel shelf, sub box, false floor, tray bit in the engine bay for fuse holder, upgrade earths, upgrade alternator power wire, etc etc)
But yes, splits up front for nice bass and such. Enjoy :D