gimmeheadroom
Headphoneus Supremus
Glad to hear you got it sorted! 

You can not transform from single ended (one circuitry) into two circuits for balanced. You can only transfer, which is something totally different. Balanced is always like TWO amps. No way you could make two out of only one.I have a musical fidelity hpa mx head amp. This has the ability to deliver via two 3 pin xlr outputs fully balanced audio. It transforms unbalanced inputs to fully balanced.
Placebo?I made my own from neutrik and ampliphon connectors with van damm silver series cable. Cost around 30 pounds and yes I would say a big difference.
More control in the bass and sub bass. Much clearer and more forward mids and a slight taming of the very high frequencies. The dymanics went through the roof. Much more range between loud and quiet.
A very good headphone before I did this and that's out of the box. Now even better.
I own an MX-HPA myself, and this is how Musical Fidelity describes it:You can not transform from single ended (one circuitry) into two circuits for balanced. You can only transfer, which is something totally different. Balanced is always like TWO amps. No way you could make two out of only one.