Voltage gauge taking a big dip?
Ok so i picked up a used Rockford HE2 10" sub and a ported box for $60 bucks from a buddy of mine. I hooked it up to a 300 watt max/150 watt cont. @ 4ohm amplifier that i got at walmart. Now it seems to me that a 150 watt amp, hooked up with 8 gauge power/ground wires, shouldn't really drain THAT much on the alternator while the car is running. But from what i've seen so far, when sitting at an idle with some good hip-hop or rap going the needle will swing from 3/4 to a tick below half when the bass hits. This is with the car warmed up, in park, with the headlights on. Does this seem normal or is my car having a hard time keeping up?
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