Okay so if I have to wire my subs up as 4ohm because they are 4ohm(correct?) then I need to get a amp with more than 150 watts per speaker RMS(300 watts RMS total).

My amp is the Pioneer Gm-6300F.

So....

My speakers can take 225 watts RMS each, if I get a amp that says at 4ohm it puts out more than 450 watts RMS then would it blow my speakers?

I measured my box and it is up for grabs if it would fit in a camaro's trunk. The box is made for the speakers yes, they were a 450 new set I saw but I paid just 100 bucks used and bought a 100 dollar amplifier for them.

I guess what I will do for now is upgrade the amplifier to a mono amp, to give them more power. The thing is my lights already flicker, even the headlights if the volume is up high. Will adding more power make this worse?

 

No, the subwoofers don't care how you wire them. It's the AMP that cares. Go here and read

http://mobile.jlaudio.com/support_pages.php?page_id=141

Something else. It's good to get an amp that has an RMS rating higher than your subs RMS rating. Like your subs RMS is 450, so get an amp that does like 500 or so. That way the amp doesn't have to work very hard to supply the subs with power. BUT this means you need to have the GAIN setting on your amp pretty low, like 1/4 to a 1/3 of the way up.

 

I agree with Largen i have 2 10" champion series pioneers with a 1800 watt kenwood amp, in a ported box, and it bumps, they are in a box i got from best buy H=13" L=17" D=30-7/10". And it fit in my hatch pretty good.