The factory HK amp sits underneath the passenger seat...or at least, it should. The previous owner mentioned that Best Buy did the aftermarket radio installation...and it shows. The first aftermarket radio that was installed was a single-DIN fli-up Pioneer AVIC unit - which is a really nice radio, but requires a lot of additional boxes. I've seen/fixed a number of BBY installations, and my read of their work is that their main concern is finishing the install quickly (time = money, right). In t