Originally Posted by dbmonster
I don't mean to cause a stink, especially since I'm a noob to this forum, but the post I've quoted is incorrect. Using a 2 ohm speaker will actually increase the wattage going through the factory wire, not decrease it. However it doesn't matter, as the factory wire is more then capable of safely conducting 2-3 times the amount of power that most people will put to their door speakers. Also, using a 2 ohm speaker with the stock deck could potentially damage the amplifier circuit of the deck as it was not designed to run that low of an impedance.
The only rational reason to run 2ohm door speakers is to get more power out of the amp that is driving them. This does come at the expense of sound quality though as most amps will produce increased distortion at lower impedance levels.
Hmm I'm pretty sure you're incorrect in a way. What you're talking about is wire size and how much current they can carry. The coil in most speakers are 4ohm which in term means more resistance aka requires more power to power the speakers. This is why the wires will heat up if they're not the right size because of the ammount of current the speakers are trying to get. Using 2ohm speakers requires LESS power to run the speakers so the wires won't have to carry as much current in them. But you're right about it'll make the amp heat up faster. So make sure to use a good after market amp instead of the stock HU. This is where I recommened Infinity because they are dual coil so you can use either 2 or 4ohm safely.