I'm MECP certified, and I don't understand the schematic. Well I do understand it, but, I have a question. Will the grounds be connected together? you have the amp and the PC case going to the same ground. Now that could just be for the schematic, but if there is one thing they teach you at school for audio/visual installs, is that you should try to limit your ground connections to 1 item per grounding post. So if possible, run a different cable to a different ground. Unless of course, you have a grounded block that you are going to connect everything to. If that's the case, make sure you have a very good ground connection. otherwise, you may get what is known as an arching sound, or where you turn on the car and the subwoofer "bumps" real quickly. As far as everything else, looks good. As for the 30 AMP fuse for the amplifier, are you sure that's going to be enough? I have a 1000X1 amp and I run at least 60 amps.