From my own experience of the balanced mains transformer I find that it best left running for one day before it really shines In my system it works but with all thing mains this will very; but at the event it was hard to hear a difference the music seemed a bit more vague to my ears without the transformer
As for feedback from the cable test. Well pretty similar to what I heard at the event I really disliked the chord cable very messy made the music unpleasant to listen too
The MAD cables were next and brought about a big improvement to the sound I still prefered Barrys cable it was the cleanest only slight critism compaired to my own silver cable a slight lack of clarity in the treble but I am being really picky.
I did not hear the MAD Silver reference cables
JJ also lent me his mains copper cables and they were pretty good
On my power amp SAC KT88 it was a step backwards compaired to the silver mains cable I use
On the CD transport hardly any difference but a lack of treble clarity
On the DAC actually helped a lot it seemed to change the tonality of my system as for the last month my system has been sounding to dark in the mid bass system and helped the system to sound balanced again I cannot explain this but if anyone interested I will try and explain what is happening in more detail (i now use my silver mains not going through the the transformer and this gives me the sound i enjoy the most)
Tim I do not think Transformer was the biggest upgrade but do think good mains is the foundation to a good sounding system and in my circumstanses this works well for me