noob stereo question, need help please! Options

[m0dd3d1]

So quick question guys, I'm looking at getting new speakers and a new head unit for my car and I was just wondering:

1 Are the front speakers on the door the same size/type/whatever as the ones in the back?
2 If I just get a good head unit (nothing special) and 4 new speakers along with new tweeters, will I need to do something about more power for them? How do I tell what I need to look for to make sure nothing gets overloaded?
3 If I get a double-din head unit like a screen, is that going to draw more power and cause issues if I don't somehow upgrade my power?


Thanks guys. I need all the help I can get, I know nothing about stereos.

[Redline08]

-I think Double Dins do not draw anymore power than a single din, same with video and non-video decks. They cant if you think about it, most are 11-16volts, if it tries to exceed that youll blow a fuse? I dont know check the power usuage on the back of the box or on the specs.

-The speakers in the front are technically 6.5" but they are in a 8" housing so you will either have to find 8" speakers (good luck) or but an adaptor that will allow you to fit a 6.5" speaker into an 8" hole. To find an adaptor just search google or eBay for 94-99 celica speaker adaptor(s).

-As far as overloading, i dont think you will have a problem with just aftermarket speakers hooked up to a head unit, i have a really nice expensive alpine deck and it only puts out 18w rms, most decent aftermarket speakers are at least over 100w peak.