What's better: RCA or XLR?


What is better; RCA or XLR connectors and why? With some brands of cables, the RCA plug cost more than the XLR, Why?
My System: Classe CA300 amp
Classe cp50 Pre-amp
Classe cdp .5 cd player
BW Nautilus 804 speakers
joeb
joeb
Ask someone who knows Classe well. I agree with the prior threads; that XLR is usually better. Some brand, as Krell (which I use), it makes a huge difference...XLR far surpassing the RCA.

Richard
Sonically, I've compared mid-priced Syn. Res. RCA and XLR ICs and with 40" lengths I preferred the sound of the RCA. It's definitely one of those personal preference things though. With long IC runs (20-30 ft. or more) apparently XLR has some worthwhile advantages. Cheers. Craig
XLR better in EVERY case if gear runs true balanced. Single-ended is a compromise of signal integrity to save money. No other reason for implementation of single-ended design and cable. Cheaper, that's it. Balanced maintains true signal, higher gain, lower noise, better dynamics. If electronics are not true differentially balanced, you're not gaining any signal integrity, only noise cancellation over long runs.
It depends on the equipment. Some manufacturers use XLR connectors w/o really using balanced circuitry so in such cases, there is no improvement in using balanced cables. I use balanced between my Krell amps and a Wadia cd player and have noticed that background noise is much lower. Plus, I live in San Fran where RF is big problem like most large cities.
Since Joeb's post seems to me NOT about the difference in sound between balanced or unbalanced ICs but about the difference of XLR and RCA connectors, I must say, that I personally prefer XLRs to RCAs, although I cannnot really discern any difference in the sound. I prefer XLRs male and female, because they often give a better fit, are easier to solder, are more easily cleaned and more rugged in case of rough handling. No wonder they have been the connection of choice for professional use for years now. If after all, you would insist on a difference in sound, I often have the impression that XLRs are quieter ( also unbalanced ), but that may well be my imagination, rewarding me for the job of having unsoldered RCAs and put in XLRs.