2 questions

1) XLR connections.... i have read about " true balanced" and just xlr.. something about the connection having a direct path to the xlr. i have also read that not all xlr are truly balanced some are just the connection. how can i know for sure what is what?

2) would it make a difference between a truly balanced xlr connection from a shielded rca connection at 5 feet in length?

here is the reason. i have xlr cables.... i have an them statement p5 amp.... is the amp even truly balanced? i was looking into a processor for the home theater.

thanks
Bill