Sorry I'm just now getting to you. Had to mow the yard before the rain comes tomorrow. Let's see what we can do.
Having more amp power than the RMS rating on the subs gives you more flexibility. Once you start getting past the RMS rating on the amp, you start getting into distortion and distortion kills speakers.
Going to a 1 ohm load on the amp when the speakers are at 4 ohm gives you the most RMS power out of the amp (see below options).
Running a 1 ohm load on an amp designed to run stable at 1 ohm will not hurt it. The only thing you will notice is the amp will run a little hotter. However, this is where Steve was talking about turning the amp gain down and utilizing the head unit as much as possible.
You are right. Most companies under rate their equipment and RF is definitely one of those companies. If this is the actual power rating, this has the power you would need for these subs. So at this point you have two options:
Option 1) Get two 2 ohm dual voice coil subs. Wire each sub in parallel to get 1 ohm each. Then wire the subs together in series to get back up to a 2 ohm load. That would get you 628 watts (314 watts each speaker) @ 2 ohm.
Option 2) Get two 4 ohm dual voice coil subs. Wire each sub in parallel to get 2 ohm each. Then wire the subs together in parallel to get to a 1 ohm load. That would get you 927 watts (463.5 watts each speaker) @ 1 ohm.
Basically this amp will be more efficient at 2 ohms (82.3% @ 2-Ohm) than at 1 ohm (73.4% @ 1-Ohm) but 1 ohm will give you more power.
I realize this is a lot to take in but look at your options and make sure the box you get has an internal volume between 0.5 at 0.85 cubic feet.
Let me know if you have more questions and I will help as much as I can. You are also welcome to call me. If you want to call, I can PM you my number later.
(Having to go to bed now though. Have to take wife and her friend to the airport tomorrow morning at 5:00 a.m.)
What he said.
And like he said I would run it at 2 Ohm not 1 Ohm
