I have a 1991 ford f-150 5.8l And i put a ten inch infinity powered sub woofer in it.I powered it with 4 ga. wire.andmy firstone 75 amp alternator went to hell.. So i put a 80 amp alternator it had good charging for a week and now it is not that great. what could the promlem be to cause it to draw that much power. And weaken the alternator.

 

may need those things "maybe called power packs" i know there's something people use in addition to battery and alternator,b/c they use so much juice.

 

Add a capacitor and check your gounds that small amplifier don't take that much power

 

well i have a ford expedition with two eclipse 15's with a 1000 one channel mono d-class amp which takes alot of power and it runs fine and have it just powered by the battery and alt. so you might have a loose ground wire and depends how you have the wires ran i wire cars all the time and you having a 5.8L you shouldnt be havin the problem my friend has the same one and its in a Volkswagon gulf so you should take it in