im looking to purchase an fi bl 10 or 12 but i dont have any extra alternators or batterys installed in my car. i need help choosing a amp that would make the sub powered correctly without ruining my car or adding extra alternators. i am going to make the enclosure myself to the correct fi specs too so if anyone has any build ideas they are welcome, thanks

this is asked alot dude, try the search function.

also you need to post more info. whats the vehicle? f it is the blazer from your info then you should be fine with a 1000-1500rms amp, do the big 3 and run 0 gauge. assuming you install it correctly you should be fine if you pay attention. amps and subs have a funny way of telling you when your pushing them too far. voltmeter.. blah blah blah... search function. learn. very easy.

1000-1500 wrms amp