I always use the direction of the signal from front end to amps. The most satisfying rule probably should be what sounds best, but some cables don't mind which way you use them but switching them around makes them sound worse at least for a while.
Most preamps in my experience are ungrounded making the star grounding idea impossible.
Recently I have just followed the manufacturer's directions, which are usually one of two: it doesn't matter but don't change or source to load.
Most preamps in my experience are ungrounded making the star grounding idea impossible.
Recently I have just followed the manufacturer's directions, which are usually one of two: it doesn't matter but don't change or source to load.