Thanks for the link. I happy it works for you.
Maybe I misunderstand your post, looks a too big transformer for audio/music signal, I assuming you are using this transformers in electrical mains wall outlet as filter etc...
I have a unsuccesfull experience with balanced transformers, I already use a 5kg 300W Toroidal transformer to down 220V to 120V for my SCD-1 power feed, for some 5-6years, but when I remove the transformer and started use a direct 120V outlet the afew month ago, I have a huge gain in sound quality.
So I realize my condo Transformer is a big 225KVA with 13.8KVolts input and my Toroidal just 300Watts with 220V input.
Regards, Gustavo