@Absolut5 is probably the best to answer this but anybody who's got either installed will probably know the answer as well. I note from the full spec on the Kenwood website that the 8019 and 8020 both have two USB inputs but I'm wondering if using additional 'USB Retention Cable' in the installation adds a third which, in the case of my Highline, is on the dash. Or is this a stupid question? Cheers.
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