I have a MacBook Pro with Audirvana 3+ using USB to a DirectStream DAC. There is an ethernet filter before the MacBook, which also has 2 AQ Jitterbugs, one on the USB out to the DAC. The DAC is also on a separate AC line and power conditioner from the rest of the audio components and network stuff. I listen to music stored on a NAS and stream Tidal.
The sound quality is great, but others have mentioned the use of a USB isolator to improve sound quality further. And then somewhere I read on this forum that the DSD doesn’t really need an external USB isolator. I am confused. Since every system is different, I am asking the question of fellow forum members who have may have similar computer/MacBook music server systems: “Considering my use of the MacBook Pro/Audirvana as a music server and in your experience, will an external USB isolator, similar to the JCAT USB isolator or the iFi nano iGalvanic3.0 have a positive effect or further improve the sound quality of the DSD?” Old story, spend the money or save the money for a better USB cable.
My apologies in advance if this question has already been asked and answered somewhere on this vast encyclopedic forum. Your responses are sincerely appreciated.