My friend got his Vivaldi upgraded to Apex. His first impression was, in summary: dark, dull, and with less gain.
When I got my Rossini Apex I did not perceive such differences, but I also did not pay a lot of attention to the sound until about 100 hours burn-in.
His settings were reset to factory (mine were not). So he’s looking into this.
What have been people’s impressions of the Vivaldi Apex changes?