I would like to get member's input on their experiences and knowledge pertaining to the use of XLR (balanced) vs. RCA (single-ended) interconnect connections between pre-amps to power-amps.
It appears that the few manufacturers e.g. Classe, suggest that you use XLR where possible as the higher voltage and greater resistance to noise will increase dynamics, detail, noise levels in general.
What are you using? Do you have a preference for either and if so, why? What in particular are the difference you've found? Keep in mind that a fair comparison would only be with cables of equivalent quality and perhaps of the same brand and line.