Okay, I'm doing the same on my PC using a USB connection, the sound quality on Audirvana is excellent but I'm still running the demo version. How are you connecting everything on your amp?
I have two different setups I use with Audirvana
1. I use the Denon 4700 via wifi with the Denon supported DLNA/UPnP interface. UPnP offers a higher quality streaming option without compression as it sends the audio to your device in the same format as it's stored on the computer. In contrast, Airplay compresses the audio.
2. I also use Audirvana via the Hegel H90 integrated amp by plugging directly into the USB port on the H90 from the MBP. This connection automatically configures the Hegel H90 as a sound card on the Mac. I select
“TE7022 Audio w/ SPDIF” inside Audirvana and all my Qobuz, Tidal and High quality CD rips play over my BMR's thru the Hegel H90.
It's so nice to have every music source available on one screen - whether it's searching Qobuz or selecting a CD or playlist. No remote to deal with and a nice large screen for viewing what's playing and what's available. I never use the Qobuz or Tidal apps and I have no need for iTunes. Audirvana does it all.