What 180 is saying could not be more true, but I love my music

I hit 154.2 in a truck I had with 4 15's, that being said, I think my XF is in the low 140s (have never tested). With 2 12's in a custom ported box, it is LOUD. The 120 seems low for the equipment you are running. How loud did you have it turned and did it seem excessive? (ie: vibrating your hair, making a cup of water shake so hard it overflows, etc. )

I figure a car DB meter on a phone is not going to be that accurate, especially considering extremely precise meters used in competitions generally cost 10's of thousands of dollars, but it sounds like a cool app, I will have to see if it is available for the Palm Pre, what is the name of the app?