DC-2 preamp RCA to XLR power amp

pyro2006 · 5th January 2007, 01:34 PM

I'm sure this has been asked before ... for reasons too long to explained I have to connect my av processor preamp (Lexicon DC-2) with the power amp (Bryston 5b st) over a 10 feet distance.

The Lexicon does not have XLR, only RCA out but the Bryston does, is there a way I can rake a true XLR out of the Lex RCA out to preserve the signal via XLR ?

thanks ahead

AndrewT · 5th January 2007, 01:58 PM

Yes,
read W.Jung, D.Self and copy Jensen pseudo balanced source.

Sites are worth reading in detail.

Sorry, it won't let me post the gif diagram.

I'll try to find the AN ref.
http://www.jensentransformers.com/an/an003.pdf fig 2.4

pyro2006 · 6th January 2007, 04:27 AM

thanks andrew

is the performance do the pseudo design better than off the shelf products ?

AndrewT · 6th January 2007, 09:14 AM

No idea.

But it preserves the common mode rejection built into your balanced input.

You need extreme accuracy when matching the pairs of resistors.
You may want to re-visit your receiver and check matching accuracy in there. I have seen 0.1% and 0.01% quoted.

5th January 2007, 01:34 PM	#1
pyro2006 diyAudio Member Join Date: Feb 2006 Location: HK	DC-2 preamp RCA to XLR power amp I'm sure this has been asked before ... for reasons too long to explained I have to connect my av processor preamp (Lexicon DC-2) with the power amp (Bryston 5b st) over a 10 feet distance. The Lexicon does not have XLR, only RCA out but the Bryston does, is there a way I can rake a true XLR out of the Lex RCA out to preserve the signal via XLR ? thanks ahead

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5th January 2007, 01:58 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Yes, read W.Jung, D.Self and copy Jensen pseudo balanced source. Sites are worth reading in detail. Sorry, it won't let me post the gif diagram. I'll try to find the AN ref. http://www.jensentransformers.com/an/an003.pdf fig 2.4

6th January 2007, 04:27 AM	#3
pyro2006 diyAudio Member Join Date: Feb 2006 Location: HK	thanks andrew is the performance do the pseudo design better than off the shelf products ?

6th January 2007, 09:14 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	No idea. But it preserves the common mode rejection built into your balanced input. You need extreme accuracy when matching the pairs of resistors. You may want to re-visit your receiver and check matching accuracy in there. I have seen 0.1% and 0.01% quoted.