I have a Concert (non-Bose) plus 6CD changer in my 99 A3 TDi Sport. I would like to get DAB so am thinking of replacing it for a Blaupunkt Woodstock DAB52 or 54. I know someone who has used a DAB FM antenna splitter in an oldish Mazda MX5 with a Blaupunkt Nashville and gets great reception so I am also thinking of using a DAB FM splitter with it to wire both DAB and FM to the existing external aerial. I am still unsure on the following: 1) If I use the splitter do I still need an FM antenna amp? 2) Is it worth holding out for a DAB54 over the 52? Can they both handle 1Gb SD cards? 3) Do I need to bypass the rear amp? ( I plan to leave all the original speaker and wiring ) If so, what does this involve i.e. soldering? 4) Sorry for my ignorance but, in AndyMacs words, swapping the perm live with the ignition on live what does this mean I have to do? Any thoughts / help on the above would be greatly appreciated.