I have a diamond D3 12 in my mommys car with 420 watts and I love it, I would have it in my car still but I got a new Jeep and lost some space and had to buy two assasin 8's =D. Yesterday I put it back in the 2cube ported box tuned to 38hz and it's ****ing great. You really can't go wrong with 375 watts in that box. It will impress you.