MOTM

Finding the right transformer is the key. It's very difficult and 
expensive to get one that performs superbly in the audio range. 
That's where your 'wide range of cost' comes it. It's such a hard 
thing to do, that many solutions just use active electronics instead 
of passive transformers.

Moe

--- In motm@y..., alt-mode <alt_mode@y...> wrote:
> I see from the tiny circuit boards, that it would be possible to
> add a second transformer to handle the "ring" signal and truly 
balance the output. 
> Perhaps that's a project for later...
> 
> It doesn't seem like building such a box would be too difficult of 
a DIY project. 
> You just have to find the right audio transformers.  There are many 
commercial
> single/dual channel direct boxes out there with a wide range in 
cost.  You might
> check the sweetwater web site for a few models.