Yeah, it's the amp. I was surprised when I opened the box and saw it. I didn't pay no mind when I ordered it. It worked out perfectly though.
Skar RP-600.5
I went a different route than most it seems. I did Skar components with 5 channel amp. Hid the single din kenwood in the armrest where the cd changer went. Everything runs off my iPad. Sound is absolutely perfect.