Well I’m up to 230 hours on my black duplexes. Sounds about the same as yesterday. The is blacker backrounds lowering the noise floor for LPs & 78s in particular. There is better transient response superior highs and tighter bass. The mid-range while cleaner is not tonally different.
The black fuses should increase the positive changes but I remember they brought the mid-range sweetness that I thought was magical like a Mac 30 amp. I should be getting them by Thursday.
a25105. Try reinserting the fuses the other direction. I found that after only 2.5 hours a huge difference. By any chance did your system sound more forward brighter and tonally thinner? That’s what the black duplex also sounded like at the beginning. Try the other direction. I heard a darker fuller more distant sound with great slam detail and warmth. It got slightly better after 12 hours til they blew. It’s possible that it just won’t sound good until they break in. It seems these tweaks are idiosyncratic unlike Hallographs which sound great when placed wherever they should be in the room.
I dont understand why most audiophiles don’t address their listening room adequately or overdampen them while the Hallographs take so much of the work out of creating a closer to optimal listening environment. They are not cheap but less costly than one high end cable. Frank, Robert, Tom Port all rely on them too.