Sorry for the delay. 56k BLOWS!

This is how I'd do it:

This is series parallel. The sub on the bottom will "see" full applied voltage and current because it is the one connected in parallel. For this reason, the max output of the amp should not exceed the max rating of the sub. You'll notice that the "total impedance" of what the amp sees is 2.667 ohms (yes, that screwed up symbol at the end is my offering of an omega). This means that the amp you choose should be a maximum of [sub'* max rating] watts @ 2.667 ohms. Don't let the math scare you.

If your sub is rated at 150w RMS, look for an amp that is rated at 150w RMS

**@ 2 ohms** if you wire the subs this way.

There is a multitude of ways to connect the subs. If you understand the basic principles, you can create an optimized system. Feel free to ask if you need further assistance.