I would tend to concur with your observation Mark, ABA-ing with Ballanced mains has manifest areas of improved fidelity viz sound stage, quality and density of base notes, dynamic swing etc.etc however that has traded off against a smidgin less finite micro detailing, particularly noticable on live recordings featuring an audience in the background, and a touch less nuance to the inflection of phrasing on vocals.
I'm really surprised by people's experiences in this subject. The BMU has increased the audibility of the micro detail in my system. The noise floor is lower, everything is better placed and spaced and the depth of the bass noticeable lowered too. I was a non believer in this sort of thing until a friend bought a N** BMU and reported his findings. He is a guy I have a lot of respect for and his finding prompted me to invest in a DIY unit. I simply won't be without it now, such is the impact it's had.
+1 for me on the above. Have found improvement across the board. One of the things I noticed about live recordings was the crowd was more audible and coherent as opposed to crowd on the left, crowd on the right without the BMU.
I think a lot of the complaints against them could be sorted by having a big enough one. I have 4KW to power both ATC 50A`s and 2KW for the sources.
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At this minute I have my phonostage going through my BMU but with all the amps (and TT PSU) going directly to the mains.
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