mark
+1y
I looked up specs on your amp and it says:
50x2 @ 4ohm
100x2 @ 2ohm
200x1 @ 4ohm bridged RMS
What's the resistance on your P1 subs? Is it the 4ohm or 8ohm?
In your case if you want to run 2 of them, it would be better if you had the 8ohm subs. You can wire them parallel and get an output resistance of 4ohms, this way you can bridge them and the amp will be fine. If you bridge 2 4ohm subs wired parallel, you're sending a 2ohm load to the amp bridged. It may handle it, but may run a little hot, just be careful
I'd recommend getting another 200.2 and that xtra sub and running an amp to each sub. This will give you the best performance for the sub/amp combo. You will not have to have the amps cranked up either, and it should sound cleaner.
Edit: I really doubt you'll need to upgrade your alternator or anything. 200watts RMS isn't really a lot. My truck has an old MTX amp that pushes in the 250rms range and it's been fine for awhile now. Headlights don't dim at all, and that's even when my viair compressor is running.