In my 05 Impala, they are extremely loud. Very good bass. I love these Type R's, my first time experimenting with Alpine subs.
I did a sound competition on Saturday and got 2nd place in the 130 class @ 138.7db.
I was told by several people though, that im just pissing those subs off because the box is too small for it. Its a pre-made groundshaker slot ported box. It is kinda small...
They also told me I could easily be hitting around 144-147 with a bigger custom box. I was planning on building one, but I just came up on some 08 12" L7's for $100 each, brand new. So Ill be making a box for the solobarics.