Balanced line

[Steve Eddy]

Originally posted by JasonL
soo..i can use this circuit then ill have to build to of them.. one per channel..

Um... no. In that diagram, the opamp circuit is merely there as an example of what's already inside your CD player. You're not supposed to create the entire circuit. Just the "added parts" in the dashed area.

Here, let's make it as simple as possible.

<center>
<img src="http://www.q-audio.com/images/adapter.jpg">
</center>

As Nelson said, simply adjust Rx (a 500 ohm or 1k trim pot will do) to match the output impedance of your CD player. If you can determine the output impedance of the CD player, you can simply replace the pot with a fixed resistor of the same value.

If you can figure out the output impedance of your CD player and use a fixed resistor, you could easily build it into a male XLR plug and run a pigtail with a male RCA jack on it to plug straight into your CD player.

se