Hi Jeff,
Over the years I've tried several different PS on the VPS. Starting with battery powered, DIY Power supplies, and Teddy Pardo PS. Each has its merits. But the Paul Hynes PS is head and shoulders above them all. But so is the cost.
Nagra recognizes the importance of a superb power supply, thus the creation of the MPS. What you heard with an upgraded PS (MPS) at your Dealer, is perhaps what I'm hearing with my Hynes PS.
Best,
Norm

