Balanced (Pro) to Unbalanced (Consumer)

You'll find these at your local music (instruments, lessons, etc.) shop.  I used XLR to RCA cables/adapters when I was doing outboard audio processing.  But be prepared to spend a bit on them - here in Canada, good ones went for around $25 each.

Radio Shack has an inexpensive 600/600 or 1:1 audio transformer that can do the job.

Digging through my notes, this is what PhilB suggests:  http://www.mcmelectronics.com/product/555-8485?t=2&utm_expid=8634549-16.9GhoAb-wRuukQ-zZa3_XTw.1

i may give it a shot, any have experience with it?

What a great item at a good price!

Just reading the spec sheet is all I need to know to realize how great this device is.

It would take a lot of your time and a whole batch of parts to build something like that on your own.

But you might need two of them, one at each end of your balanced lines.

Or, you could buy one of them and use it to drive the balanced lines...

At the other end a Radio Shack 1:1 transformer to convert from balanced back to un-balanced.

This MCM device even gives you the option of driving TWO mono lines to two different transmitters!

Come to think of it, I think I'll get one!

Maybe a balanced stero to balanced mono coversion cable or device would be useful.. then you can take the 1/4" stereo out (like on my old mackie cr-1604) and combine it to a single mono out to either XLR or 1/4"

EDIT:  http://www.rane.com/note109.html figure 2 looks like it could do what I want. Thoughts?

Figure 2 shows an unbalanced pair sharing a 2-circuit 1/4"-plug.

A 2-circuit "stereo" 1/4" plug can be used in balanced configuration, but it would be only one monaural channel. You'd need two of them, one for left and one for right.

Figures 3 & 4 show balanced line summing.

Radio Design Labs makes several such devices, such as the passive TX1A:

http://www.rdlnet.com/product.php?page=160 (You'll need two for stereo).

Henry Engineering's USDA2X4 is also worth a look:

http://henryengineering.com/heusda.html