I was having a periodic hum in the torroid transformer in my nad power amp. I did some researching that pointed to DC in the power line causing the hum. I found that the DC was being caused by the ...

I've mostly been using my Fubar III DAC to connect my MBP to an older analog-only stereo amp, which means I probably never heard any issues with the DAC because the amp itself has a "nice" hum that ...