ok i have one 700watt amp now and i was thinkin get anotehr for my other sub but i see now that power acoustics has a 1440 watt 2 ch amp should i get to mono alpine amps or one big one each mono costs 200 and the big acoustics is 400

 

I would get another 700 watt amp. Power Acoustic is good and all but I would never switch from Alpine. Plus Alpine amps along with Alpine subs are great.

 

what kind of alternator are you running? if its the stock one it probably isnt going to like 1400 watts.

Why not sell the alpine you got now and run one mono amp to both subs? That would probably be your best bet.