does anyone know any info on the ford bf factory amp how many watts etc..
another question im planning on changing the subwoofer thats in the parcel shelf
what sort of replacment sub would ok to replace the factory sub and run it of the factory amp?

Hey mate, the I have a BF XR6 with the premium audio, and when i baught the car the sub had s**t itself. So i baught a pioneer sub, ( Cheapy from supercheap ) and put it in a sealed box and it works a treat off the original amp. with the back seat down its pretty good for a factory amp and cheap sub. I even asked a guy at my local audio shop and he was suprised with the bass.

As for the specs i couldnt tell you mate, But i am interested myself to know.

Cheers