Mines a QC but the install is the same. I put an Alpine 400watt 4 channel amp under the drivers seat, lots of room, out of the way. I also replaced the front door speakers with JL Audio VR690's(3 way 6x9) and the rear doors with JL Audio VR600's(2 way 6") and put infinity 3-1/2" in the dash holes. All speakers are direct replacement pieces, no cutting trimming or fitting. The amp is a little tougher because you have to cut all the speaker wires from the radio and run them to the amp, then back to the speaker wires you just cut(cause I didn't want to run new wires into the doors and the factory speaker wire is completely adequate) but it's still 8 wires down to the amp and 8 back up.
Good news is it CRANKS, and with those speakers has very crip clean sound, with enough bass to boot. Could run a sub, but I don't want to lose my under seat storage or load flat floors... . Mega may have the romm, quad doesn't.
Brian