Adding a sub w/ new amp to another amp?

How would you wire that? You'll have to forgive my ignorance

Edit: Found this link: http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2SVC_4-ohm_mono.jpg

Could you explain how it goes from 2ohms to 4 in that diagram? And if I had 2 subs that had an RMS rating of 200 watts at 4 ohms would I look for an amp that put out 400 watts RMS at 2 ohms to power that?

 

That link shows how to wire it. Without getting too technical, when you decrease the impedance presented to the amplifier you will generally see an increase in the output. In many cases, the normal increase is double the power at 1/2 the impedance, or 1/2 power at twice the impedance.

Basically, the amp I linked will do 200w@4 ohm, 400w@2 ohm.

 

No worries! Actually that diagram shows it going from 2 single 4 ohm loads (same as the subs you are looking at) to a single 2 ohm load in order to show the amp a 2 ohm load and you would wire yours exactly like that.

 

....and what matt said!

 

Well guys just threw out my plan haha. Ordered this amp off ebay a few hours ago for $75 and I think I'm gonna go with these JL's.

Amps used but here it is on Sonicelectronix:http://www.sonicelectronix.com/item_9927_Memphis-16-PR1.500.html

And these subs: http://www.sonicelectronix.com/item_5161_JL-Audio-10W1v2-4.html

What do you guys think?

 

Also I should add that my coaxials in my doors are these Orions: http://www.sonicelectronix.com/item_11872_Orion-Cobalt-CO570-2009-Model.html

Powered by this amp: http://www.sonicelectronix.com/item_11593_Boss-CX150.html

I realize that with 1 set of RCA outputs that by using some sort of adapter I will not be able to adjust the sub or door speakers from the headunit. I found these adapters and was wondering if they would work to run RCA cables to both of my amps.
http://www.audiogear.com/cgi-bin/shopper.cgi?key=MstrILJRY-2F&preadd=action

I was thinking I should add some bass blockers so my door speakers wouldn't distort at high volumes. My headunit goes to 50 and it starts to distort at around 40 right now. My thought was that if the low frequencys were blocked the speakers wouldn't distort trying to play them. My amp sucks and doesn't have a hi/low pass crossover so I thought these would serve as a substitute. Which set would I need?
http://www.sonicelectronix.com/item_40127_Xscorpion-BB199.html
http://www.sonicelectronix.com/item_40128_Xscorpion-BB398.html

My buddy says I should start over and get a new headunit, amp for door speakers and new components for the doors but I'm not prepared to spend that kind of money right now. I realize RCA splitters and in line bass blockers probably aren't ideal but will that setup stand up well enough with my subs or will my mids and highs noticeably suck in comparison?