I have since sold my Ayre QB-9 DSD DAC but it did “stop working” and had to be retuned to the factory for a transformer repair. As you noted, I wonder if your buzzing is due to a transformer issue and am hoping your new transformer solves the buzzing problem. Please keep us posted.
I was told the Ayre Codex DAC employs a very high quality linear power supply. This is why it sounds so good in balanced mode. This also means that the voltage is fixed.
Based on the above two description, its sounds like both Ayre Codex DAC’s are having buzzing problems on 220v. My best guess is both these units are having transformer problems and that factory repairs are required.
I was told the Ayre Codex DAC employs a very high quality linear power supply. This is why it sounds so good in balanced mode. This also means that the voltage is fixed.
Based on the above two description, its sounds like both Ayre Codex DAC’s are having buzzing problems on 220v. My best guess is both these units are having transformer problems and that factory repairs are required.