simple stereo RCA to mono XLR cable build question - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 18th March 2008, 01:46 AM   #1
diyAudio Member
Join Date: May 2005
Location: St. Simons Island, GA
Default simple stereo RCA to mono XLR cable build question

Hi, I want to build a couple cables that will allow me to connect the RCA audio outputs of consumer equipment to a single XLR input of an audio console. I want to make these cables so I don't have to use a complex setup including a pair of direct boxes and connectors and adapters and the like.
I am not looking for the perfect solution, but an affordable and streamlined (no clutter!) approach.
I imagine a pair of 10K resistors joining the two hot pins from the RCA outputs to pin 3 of an XLR male connector, and the shields joined directly to pin 1 would do the trick? Would there be a better value of resistor to safely join the two sources?
Thanks for any input!
  Reply With Quote
Old 18th March 2008, 02:32 AM   #2
cuibono is offline cuibono  United States
diyAudio Member
cuibono's Avatar
Join Date: May 2006
Location: City of Angles
could you draw what you mean?

so you are trying do to mono summing from a stereo source?

First, I don't know why you would use resistors - I don't see any reason? Secondly, usually pin 2 is 'hot' (pin 3 carries the negative going signal), so I would connect the rca pins to pin 2, although it probably doen't matter much if your not an 'absolute phase' fanatic. And, yes, the rca shields would go to pin 1.

You could just build it and see, I doubt you could hurt anything. The only thing I see the resistors doing is attenuating the signals some..
  Reply With Quote
Old 18th March 2008, 02:42 AM   #3
diyAudio Member
Join Date: May 2005
Location: St. Simons Island, GA
yes, I am summing a stereo source to mono. I thought the resistors are needed to isolate the outputs from each other. And yes, my mistake, pin 2 is hot .
  Reply With Quote
Old 18th March 2008, 03:21 AM   #4
TheMG is offline TheMG  Canada
diyAudio Member
Join Date: Jan 2008
There's 2 ways to wire it, shown here:

Just add resistors as needed and you should be good to go.

If I'm not mistaking, the first approach is the better choice.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mono to stereo input wiring question Keskin Class D 8 1st March 2009 11:33 AM
Xlr Stereo To Xlr Mono jaya000 Solid State 4 9th February 2009 02:24 AM
How to build a simple balanced mono line mixer jandalo Analog Line Level 4 8th November 2008 12:40 PM
Dual Mono vs Stereo Power Supply Question bluegti Chip Amps 4 2nd January 2007 03:26 PM
Want to build mono blocks, quick question. Zemo Chip Amps 11 21st April 2004 07:48 AM

New To Site? Need Help?

All times are GMT. The time now is 07:26 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2