I agree with your brother, as I've experienced a sonic improvement with them.
I just added a Cambridge DacMagic into my system, and when I contacted Cambridge to make sure there wasn't a compatibility issue, it was strongly suggested to me that I do not use them with the DAC.
I *didn't* check on my MSB Full Nelson dac which went belly up after months of trouble free use, with the tweak installed. So, causality is hard to know.
Of course, I'm somewhat concerned about the rest of my equipment which has been tweaked.....
I just added a Cambridge DacMagic into my system, and when I contacted Cambridge to make sure there wasn't a compatibility issue, it was strongly suggested to me that I do not use them with the DAC.
I *didn't* check on my MSB Full Nelson dac which went belly up after months of trouble free use, with the tweak installed. So, causality is hard to know.
Of course, I'm somewhat concerned about the rest of my equipment which has been tweaked.....