Low Current draw amp selection --- HELP

[thugpassion 10+ year member]

ok here is my issue, i want to keep my 12" L7 and am getting 2 pairs of 5.25" kicker ss components (through an incredible trade). I need a sub amp(700-900rms@2ohm) and 4ch(70-90rms@4ohm) BUT my alternator is only 80A. I'm currently running a power acoustik 1600w 2ch (75A fused) w a 3farad cap and it's fine but i want a more efficient amp and want to amp my speakers. Basically i need some very efficient low draw amps.

What do you guys think would work well? i deffinately want the same brands mono and 4ch. i would prefer kicker, eclipse, polk since i get the very cheap but i cant find much info on the eclipse line.

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