XLR, RCA or BNC?

Rannagarden...NO! We do NOT agree that XLR connectors reduce noise. BALANCED INTERFACES are more noise resistant than unbalanced, so IF you have a problem with noise pickup (and this should only occur with runs of 50 ft or more such as are common in Pro sound applications) a balanced interface would be preferred. The balanced interface can be implemented with other types of connectors as well as XLR.

Clue me in...what is an electric bump? Do they grind also?

While you have done well to keep this thread on base, so to speak, it reminds me of the often askes question:

"Other than that one thing, Mrs. Lincoln, How was the play?"

The point being that there are far too many more variables than the base of the connection. For instance, my McIntosh 2102 amp has both balanced (XLR) and unbalanced (RCA) inputs which would be good to use in your test, except that this amp has an extra circuit that converts the balanced to unbalanced so naturally I should use the RCA first as this is my amp's preferance.

My Audio Aero Capitole Cd player works best with my Audio Aero Capitole amp using the balanced connections. So, I use the CD player's RCA outputs to the McIntosh and XLR to the Capitole.

I shall let others get started on quality of cables, kind of metal in the cables, shielding, etc.

This is not to say that your 'bump' is not unimportant, just a bit esoteric.

Eldartford.

Ok. Bad choice of words. What I meant was the same as you describe.

´Electric bump´. Thought it was a simple way to picture a difficult thing.
If measured in Oscilloscope cables and any measured signal path will leave a trace in the shape of ´waves´ on the Oscilloscope monitor. A ´bump´ is the same thing as a wave. Ideal is no wave or bump. The fingerprint wave/bump of RCA and BNC differs. To BNCs favor.

I´m not interrested in cables quality, brands or shielding. I know that many will say that one can not disregard all the other things - one must see the whole picture etc. But I´m only interrested in that tiny bit that has the job of connect our cables to the equipment.

Unclejeff - You may be right...

Thanks,