I have the Parrot MKi9200 installed in my 2005 XJR with the premium Alpine sound system. Earlier posts in this thread showed my installation in my previous XJ6 (without the premium sound option) and when I got the XJR I did have some fun and games getting the Parrot kit installed.

The basic issue is that the Parrot uses its own in-built amp which can only output to 4 channels - Left & Right/Front & Rear - so when you hook it up to the Alpine premium system it doesn't output to all the speakers. I can't remember exactly which ones it doesn't use but the end result is, whilst it works, the sound quality is poor.

I tried various things to get around this all to no avail but then I came across this...

Car DAB radio, convert car to DAB with this in-car dab radio

....which you can wire into the Alpine system via the radio aerial socket. As well as providing DAB radio, there is an option for an Aux-in connection....and as the Parrot has a line-out connection you can then connect the Parrot to the DAB unit which in turn connects to the Alpine system. This bypasses the Parrot's own amp and means that the Parrot's output is now going via the Alpine amplifier - which means you get sound via all the speakers. And you get DAB as a bonus. Voila!