Originally Posted by DJ Fukalya

I joined this site after viewing this thread. I am interested in buying one but I will do some more research first.

Edit: Looks like I don't need it.

Subwoofers (FAQ) - Nissan 350Z & 370Z Wiki

Does the 350z have a factory subwoofer?

Yes, but only on the Touring model with the Bose sound system. It is a 10” special Bose subwoofer located behind the drivers seat. However, the subwoofer mounting bracket is on all of the models, and some people have used it to mount aftermarket subwoofers as a “stealth” install.