My Viva Aurora 845 is the best sound I have heard in my system with Trios and also Silverline Sinfonia 96db 8 ohm speakers. They are far more expensive than what I compared too, so comparison wasn't really fare. On both speakers they beat a Yamamoto A-08S (45) and a Wavac 300b. Both these amps had a more lush midrange but the Viva was far more clear. The Vivas won in all other areas. This is just in my system though and my opinion. The Vivas retail for $25000 but I purchased for a fraction of that used. I think Viva equipment is expensive ,but at the same time underated. There doesn't seem to be very good marketing for them in North America.
Steve.
Steve.