Adding in a Sony 1000W AMP, need some help

[95mustanggt]

My wife's stereo system was causing her some greif, and there was this 1000W AMP for CDN$150. So I bought it. (I also picked up an 800W 2/3/4 channel for my stang )

Anyway, I'm wiring the system in and here's how it goes...

Deck - Pioneer 2X45W's are driving the rear 6X9's.

1st Amp - Alpine 2X25W is driving the front 4" doors speakers

2nd AMP - Sony 1X300W is for a 12" Sound Stream Sub.

I have connected it as follows:



I have a few questions

1. (More of a comment) I am going to swap out the 30A fuse to an 80A as the directions on the SONY AMP. Is this going to harm the Alpine?

2. I have this "remote" wire going from the deck then split to each amp. Without this wire neither amp will work. Is is OK that I have it split to each amp like it is?

3. Everytime I turn on the car the sub goes blahhhhhhh (kind of a high-low tone and then the fuse blows (30AMP). Is this just because the 2 amps are drawing way more than 30A and I NEED the 80A fuse?

4. Screw-ups noted in my wiring diagram?

Thanks guys.