The kicker mentioned above also would work as well. It is only really a 300 watt though not a 600 watt. If you read the description it says it is a 600 watt peak and 300 watt rms. Always go by the rms numbers not the peak. Rms is the continous power and the actual output numbers of the amp, this is a simple way to put it. Although being a 300 rms it would still work with your subs being that they are 150 watt rms themselves, but I rather go slightly upwards on the amp though to have a lil room power wise. Rockfords amps are typically underrated too meaning they usually output more than they say. If you buy a new one they will come with a birthsheet showing the actual output wattage of that amp when it is tested before packaging up to ship out of the manufacturer.