I tend to find myself turning the sub down more then up lol. At a certain point I worry about my dash electronics, this sub hit so hard its sending water ripples out around the boat, when surfing there is no issue hearing and feeling the bass from this size sub.

When I has the 12, it was a prototype that is now the official Big 12 of Exile and it hit really hard as well but on no level compared to the 15.

I have had to go back and put nylon lock nuts on every bolt in my dash, as I would randomly find bolts laying on the carpet.

I am sure 4 10s, 2 12s, have a more solid punch though, it kind of depends on your preference in how the bass sounds I think. I really like the sound of the 15, but in my truck I have a 10 and it punches really hard and makes it seem a little larger then it is.