Cheers Daz.
For what I could take from that. Is that the Harman-Infinity Clari-fi audio technology boosts low bit rate MP3 files.
Which would be Ok in a high percentage of people listening to music in there car.
I had a aftermarket Kenwood head unit in my last car that had something very similar. Just under there own name.
Personally on the Kenwood unit, it didn't make it sound any better at all. But of course on good quality amps & speakers.
So on a stock system. It would make a slight difference.. But of course it would always be better to have good quality audio files to begin with.
As most of mine are either in FLAC format or I have ripped my CD's into iTunes..