I have the Infinity Perfect 12.1 sub running off my Rockford Fosgate 500s amp, Cerwin-Vega front speakers and Audiobahn back speakers (both running off the HU at the moment.)
What I want to do is get a second Infinity, a kicker KX600.4 for the mains, and a Kicker KX800.4 for the subs. My question is, what kind of current will these amps be pulling? The KX600.4 will only be pulling half current at the most, since I will have 4 ohm speakers hooked up to it.
If it's too much, I think I will get a bigger alternator before the amps. Anyone know how to find out what size of alternator I have right now?
Gold MemberUsername: Glasswolf
Post Number: 1405
75x4 and 100x4 respectively.
take the RMS wattage for the load you'll present to them, and divide that by 12.
then add about 50% of that total again for inefficiency.
that's what the amplifiers will draw (in amperes)
you may want a class D amp for the subs. then the class D only adds an extra 20% over load for inefficiency. consider the KX600.1 or 1200.1
to find the stock alternator rating, call AutoZone or Advance auto parts and have them look up the stock replacement rating.