Adire Audio Shiva only comes in 8ohm DVC(wire it down to 4ohms)...so you will only be seeing about 1/2 the power out of the JBL 600.1, due to the fact that it maxs out at 2ohm's. Dan Wiggins of Adire tested the sub at 600 watts RMS. I would get an amp that will give you 500-600 watts @ 4ohms...