As would the Digital Interface which sounds too close to the Audiophilleo for the price difference (I owned both with the Ref-8). In any scenario, the improvements are small- for instance, the difference between my optical out of my soundcard is only subtly worse than the DI or Audiophilleo added in the chain.
Good to know. Another question; can all DACs handle asynchronous USB or is that a feature that some DACs have and others don't? Reason I ask is that I would like to know if using the SBT + EDO (without an external re-clocker), fed to the Audio-GD USB input would yield any benefit over SPDIF input clocked by the SBT Duet? Basically is the internal clock of the Audio-GD better or worse the the SPDIF clock from the SBT Duet? Thanks.