How to go from RCA to XLR?


I've got an Aragon Stage One processor with RCA outputs and two Aragon Palladium 1K monoblocks with XLR inputs. I know there are a lot of RCA-XLR cables available, but a fabricator told me you have to know which XLR pins are "hot" and these have to match the amps' input circuitry or you will damage the amp.
So how do you know which pins to make hot when you order the cables? When you buy these cables "off the shelf" are you just hoping you get lucky and they match up with your equipment?
Thanks
noslop
Yes, well as far as I can tell I think you'll succeed in both respects, if you install an xlr jack connected as I described, and connect the speaker between the + outputs as I described and not as the manual describes.

Good luck with it!

-- Al
I have to aquire another amp first. Might take awhile, but thanks for your input.

Robt.
A couple of further thoughts.

It will be important to make the two channels as identical as possible, meaning identical tubes, identical bias settings, etc. Otherwise the positive and negative parts of the waveforms will be treated asymmetrically, which is equivalent to a distortion.

Also, I take back what I said about possibly using the 16 ohm taps. I think that would result in too much current flowing. Perhaps someone else could suggest which taps would be best to use.

-- Al
Man you guys really get into it. Its great. I'm an M.D. so my knowledge of electronic design and theory is quite limited. I'll have to read it all again a few times to even begin to understand all that's been said. But in medicine and all science, empiric evidence trumps all. So here's what I found empirically. When I hooked up a balanced Aragon Aurum pre amp to the Palladiums, I couldn't turn the volume to half before my Martin Logans were so loud, it hurt. With the Stage One's gain at max (there's a gain control in the advanced settings), and the volume at max, the speakers were loud,(sort of), but nowhere near as loud or impressive as when the balanced Aurum was hooked up.So I'd have to conclude that the amps were, indeed, being hobbled by the RCA to XLR conversion.
That being said, anyone want to buy a slightly used Stage One, cheap?