it doesnt matter with Kicker SOLOX or what ever
the basic power rates is all about the wrms you take out from your amplifier
if you put 2000Wrms @ 0.5 ohms / 600wrms @ 4 ohms Amplifier
and using it on 4 ohms - 55~60Amps alternator is good for it
when you take out 2000Wrms @ 0.5ohms , then you will need to put 180A alternator
All thing depends upon how much rms you are taking from your amplifier , for the LOAD
To test out whether your alternator is powerfull or not ,
hook Volt Meter on amplifier`s power terminals ,make sure voltage doesnt drops below 11v
whether at 4 ohms / 0.5ohms ,
i am taking out 850wrms , 75A alternator at medium rpm voltage doesnt drop below 12.5v