Everything is connected to a power strip with 60dB RF attenuation.
Signal chain w/ components:
Computer via AQ Cinnamon USB to Schiit Eitr USB-coax converter (uses isolation transformers), via AQ Coax to DAC, then via AQ Red River XLRs to monitors. Both the monitors and DAC have quality power cords, the one for DAC being especially designed for digital components.
Is there still a way for RFI to enter the system in an audible scale?