I must admit to not noticing Lee7's post.. A bit unusual, but I guess we all miss things sometimes.
So there you go, it is a fixed power supply.
Which does highlight yet another difference between Yamaha's "Pro" and "home user" markets.
The Pro gear DOES have switching power supplies, and the home stuff doesn't..I do wonder why this is?
I have bought several Yamaha items from overseas and ALL had switching power supplies. I have never bought a Yamaha home product.
Dennis