i got a kx1200.1 watt running 2 of my solo-barics OR 1 solo-x. and a kx800.4 running my highs, and i have never had a problem with my system. i've been running this setup for about 4 years or so now. since the square solo's came out. if i had the money i would definaly buy a new altenator but i'm broke so what i have have been doing fine.