Anything Diamond is golden in my opinion. Just match the amp to the sub's RMS power basically. I have two D3 10's in my truck, they are 400 watts RMS a piece and I have a Rockford T500.1 pushing them. The birth sheet on the Rockford said it's output is 720ish RMS at 1 ohm. The truck sounds GREAT, I actually have to keep the subs down a little. If the RMS rating on the sub is 300, get an amp that runs around 300 watts RMS.