Does it pay use XLR connections from your preamp to amp if your connection from your DAC to the preamp is not balanced? I have heard to reap the benefits of a truly balanced system that every connection needs to be balanced. I only ask because I am looking for a new preamp to go along with my Pass amp. I am leaning to the Pass X1 but I would like to keep tubes in my system and most of the tube preamps (CJ, BAT, Thor Audio) that I am looking at are single ended or use only XLR in and outs. My current DAC is only single ended.