what amp to buy?

Here is how to wire two 4 ohm subs in a parallel circuit. This wire method will be used if you purchase a mono sub amplifier that is designed to operate at 2 or 1 ohms.

Like was recommended above, an amplifier with between 300 - 500 w rms @ 12volts at 2 ohms mono would be a good amplifier. Here are some to consider, there is many more. Look at these two and then you can get an idea of what you might need.

Concept CA525m     www.conceptconcept.com

Lightning Audio B2.350.1      www.lightningaudio.com

You only need to pay attention to the part that talks about SVC subs.  It is just showing wiring options, you dont even have an amp yet so no much to worry about.  Look, do you want a amp to run the subs and just the subs, with no option of running anything but the subs?  Then pick a mono (one channel) subwoofer amp (the alpine, hifonics,xtant on the other page or the JBL on this one) *note: while i am aware of ebay and the great deals that can be had, i also hear the more-then-occasional heartbreak of someone who does not get what they expected*.  Or do a search with a reputable company like SoundDomain or Crutchfield, you'll spend more with these but you'll likely get better support/return and no surprises.

I still cannot find info on those subs.  "if i had one of those, and 2 800 watt xplods... will it bump?"  Yeah... Maybe... you need to build a good box that is 1. Solid   2.  The right airspace for your subs.  Porting your subs is way cool!  Unless you do it wrong, then you just have a hole with a tube in your box. When it comes to porting: if you dont know what your doing-dont do it.   Your manual should have a few box diagrams (usually a ported one is included), they will be simple, but nothing is wrong with simple.  If you load your car down with enough Plexiglas, neon, and fiberglass to make the bumper drag your still not going to have a good sounding system if your box is not  1 & 2.  Any of the amps on either of these pages will make  your system bump if you have the right box and set up everything correctly.

Go here to learn more http://www.jlaudio.com/tutorials/index.html  or look to the left and read the menu.

/agree with padawan. 

I'm sure you understood SOME of what was on that page.  It was written in english, right?  Help us help you.  If you're going to ask for help, read the links sent by other members and try to figure them out.  Then ask specific questions about what you don't understand or, if you don't know what questions to ask, post the extent of your understanding and we can help you flesh it out.  Doing things this way is much more productive for everybody.  Who knows, you might actually learn something. 

I'm sorry if this post sounded flippant or rude, but one of my pet peeves is when people take the time out of their day to help by digging up a link or two and the new member doesn't even try to do some research on his own. 

Here:  http://www.bcae1.com/spboxnew2.htm

Once you're done reading that go to walmart and see if:

If they are, buy them.  If they aren't, don't.

A larger selection of subwoofer boxes can be found here: