better sound

i have a 01 grand prix gt and i have 3 kicker 12l5 speakers  and a power accoustik  ps4000d

RMS Power Rating:

4 Ohms: 1200 Watts x 1 Channel

2 Ohms: 1700 Watts x 1 Channel

1 Ohms: 2200 Watts x 1 Channel i was wondering if that amp is gonna be enough power for those subs or these amps dont  push out what they say the do? should i get another l5 and another amp or is that good im at my limit with my trunk space  but i dont know if that will sound good i would really appreciate your help since im fairly new to the car stereo world. thanks guys

dual 2 or 4ohm subs?

Kicker 05S12L54 Kicker 12'' 1200 watt Solo-Baric Dual 4-ohm Voice Coils 600W RMS

If you have not already bought them 2ohm subs would be better so you could wire each to a 4ohm  and then run them all together giving you a 1.33ohm load to that amp. With dual 4s your going to have to wire each at a 8ohm load giving you a 2.67 ohm load. So i suggest you find a good power 2ohm stable amp or even a powerfull 1ohm amp thats going to give you the power you want at 2ohms. Something around 2000 watts rms at 2ohm since you will be slightly higher than 2ohm and the sub is underated on power handling a bit. The Power Acoustic will fit the bill pretty well. But you will not get the 1700rms it claims. They are a bit over rated but would be pretty good power to the 3 L5s. If you could get dual 2s instead of the dual 4s you would be able to get more power to them from the amp but with that extra power it will be working the amp harder. Hope this answered your question. If you have anymore feel free to ask.

thanks alot j. i have traded the amp and got a Kicker ZX1000.1 Class D Amp Monoblock 1000 Watt Amplifier in stead i wanted to know if i should get a sealed or ported i dont know wich one sounds better. another thing a buddy said that  i should go with 2 subs in stead of 3 what do u think?

I hope you did not buy woofers yet.  Your new amp is not 1 ohm capable.  It is 2 ohm minimum.  So you will need the dual 4 ohm woofers each wired in series so each woofer is an 8 ohm driver. Then parallel each woofer at the amp for a 2.66 ohm load.

i dont know what to use what do u suggest ? remember i have a 2 door car but i really want them to hit hard. i dont know about ported or sealed.

i have a 00 grand prix gt the trunk is 3' in length and 4' in with