Originally Posted by Scottmilkeway
my front door ones are round though? wouldnt they be 6.5's?
They would only be round if someone before you installed new ones.
I am going to assume that you are new to car audio, and while I'm trying to make fun of you, there are some points that you are missing. Judging from your first post about the speakers, I can fairly say you don't know much.
Firstly, the equalizer comment about assuming that there is only three speakers, to accommodate the three different equalizer settings is wrong. Just sayin. You will have four speakers from the factory. What other owners did is, well frankly, just what they did.
Those three settings have no impact on how many speakers you have.
Sound is measured in hertz/megahertz. Those three settings merely allow you to adjust the high-Treble, Mid, and low- bass, frequencies. Most aftermarket decks will allow you to go in a set each frequency range individually, instead of just grouping them into three generic settings.
As I said before, here is the FACTORY specifications on speaker size:
Front: 6x9 (oblong)
Rear doors/Wall speakers: 5 1/4: (Round)
Here is what can commonly be used in place of those that I listed above:
Front: 6 1/2" Round speakers.
Rear: 6 1/2" round speakers.
It's common practice for those that like extra bass, but don't want the hassle of installing woofers.
Now, since I think your hinting at doing a full speaker replace, I will go ahead and share some tips. If you go and buy all new speakers, you should really thing hard about converting the fronts to round size. IMO, it's not worth the hassle involved to do one right, and 90% of the people that do it, fail to do a clean install. If you want decent mid range speakers, I suggest looking at brands like Pioneer, Kenwood, fosgate, clarion, and those of the like. If you want to start getting into component speakers, then I would push you into brands like Infinity, Alpine, Eclipse, and those of the same like.
One thing you must not forget. ALWAYS ALWAYS REPLACE THE STOCK WIRES. This is more important to you since you have the infinity system that has the worthless amps, and their hair pulling wire mess that comes free of charge.
I am an audio nut, so feel free to ask more questions.