[BradJudy]

Some took a VDA-2 and a pair of VHP-2's (and a total of three VAC's) to create a balanced setup for their balanced Senn HD-650s. 

http://www.head-fi.org/forums/showthread.php?t=258855

Neat idea.

[CIAudio]

Some took a VDA-2 and a pair of VHP-2's (and a total of three VAC's) to create a balanced setup for their balanced Senn HD-650s.

Yep..it's pretty cool...balanced from input to output 
I've done similar using VDA-2 into two VPC's, into balanced D-200's.

[sk138]

Yep!!!!...That's me   I am soooo loving the sound. With all the money I "wasted" on single ended, I am kicking myself for not doing this sooner. But it's never too late....

Dusty...you got great products!!!