marruronu

i dont know much in this field but i just have a few words for you.
try to find out whats the RMS power of each of your subs/speakers and if you want to run it 2 or 4 ohms.then buy an amp that has enough power to feed your subs/speakers.if all in all lets say you have 500 RMS each sub/speaker and if you have a two then thats 1000 RMS,so you need an amp that has 1000 RMS.its up to you if you want 2 or 4 ohms,as long as your amp has the pwer to push both your subs/speakers.if you install it and notice that your lights dim when a loud bass hits,then yuo might wanna consider either buy a separate battery,replace more powerful alternator or a capacitor.but usually a capacitor will do.
hope this helps you out a bit.good luck rattling your ride.