Hi, me again. i have ALMOST bought my S3 now! this question is probably one for AndyMac if he is around?? The S3 i have chosen has the bose upgrade which i hear is 'ok' but not great. so to start i want to add my Infinity Basslink amp/sub combo. Im not fussed about stealth or boot space right now plus the basslink sounds amazing and really transforms a system! So i know i need to run the power cable from battery to boot but then what? Will i loose the built in bose sub or can i run both at the same time? Is there any point running both at the same time? Can i take the preout feed from the boot where it connects to the bose amp or do i have to run phono cables down the length of the car aswell? Finally the basslink takes 4 inputs!! it take Front left and right and Rear left and right inputs (which is fine as my current sony MD headunit has those outputs!) but will the symphony II headunit give the same outputs?? thanks once i have done this i will see what the system sounds like and decide whether i want or need to upgrade the cabin speakers!