Question about my subs & possibly new amp!?

Question

Okay, currently i have 2 10" shallow subs @ 1000w each and looking around for a new amp. The one that im looking at is 1800w peak (mono block). now, the 10" subs have a 4 ohm resistance (per sub). On the speck sheet for the amp, says 4 Ohm @ 500RMS, 2 Ohm @ 900RMS and 1 Ohm stable 900RMS. Does this mean for the 2 subs the amp will produce 250RMS into each sub? Also, can you rewire the subs into a 2 Ohm resistance to produce the 900RMS, and how well would they handle it. What would the general outcome be if i just wired it all up as is? Any help would be great. cheers

Amp speks:Mono Block Amplifier (1CH)

Can drive up to 4 subwoofers

1800 Watts Maximum Power

500 Watts RMSx1 @4 ohm (20-200Hz, 0.5%THD)

900 Watts RMSx1 @2 ohm (100Hz, 1.0%THD)

900 Watts RMSx1 @1 ohm (100Hz, 1.1%THD)

CAE Compliant

1? Stable

Class D Amplifier

Sub speks:* 10in Shallow Subwoofer

* 1000W Maximum Power

* 250W Nominal Power

* 87dB Sensitivity

* 20Hz 1kHz

* 4 Ohms

Answer 1

lunchbox is correct

Answer 2

If you wire the subs in series you can get to a 2 ohm load and they will pound!  Each sub will be getting 450 RMS.  This is the simplest way to set it up.  You'll run one wire from the + on the amp to the + on one of the subs and then another wire from that sub's + to the + on the other.  

amp---sub 1---sub 2