ok well my friend is looking at getting a 12 inch w6, and i want to know what would be louder, my 12 inch rl-p in a ported box with 960 rms in the trunk of a car, or his w6 in the same ported box with about 500 rms inside an suv? he wants about the same sound as what i got, but he has his mind set on the w6 and well if you got the money then why not. also what would be a good tuning frequency for his box and total box volume to make it sound the best for all types of listening? thanks a lot guys.