Viva or Mastersound?

Keithr
Not exactly.
Viva represents the today SET sound.

Master sound has old school tube sound colored and slow in the bass.

I have a Mastersound Evolution 845 since 14 month and I must say that it is not colored or anything like maple syroup as said above.

I'a using it with Blumenhofer fs-1 speakers, SACD dCS Verdi, Elgar plus and dCS Puccini clock and excellent silver cables. Sound is clear, fast, there are lots of bass when recorded, the sound is not colored at all, voices are incredibly truth.

After live concerts of classical music I come home and put similar music as heard moments before and I must said that it is difficult to hear any difference.

I doubt there are many people who had the opportunity to compare the two amps in the same environment. Best would be to go to Vicenza, meet the two owners and have a great dinner!

I would wholly concur with Cousingermain.I have Mastersound 845 Monoblocks with Mastersound PH5 Preamp and Kondo SPC cables and this lot slams out the bass with brilliant clarity and soundstage.There is nothing whatsoever coloured or slow about it.The speakers are ART Noveau.I have not heard Vista so it would be wrong of me to pass any comment.
After all it is down to what your ears hear ast the end of the day,good luck in your quest

The Solista uses 6C45p for the input tubes. Does anyone know of other tubes that could be used in this position? It seems like russian tubes are the only option?

I prefer Visa but also have Mastercard. I don't like AMEX though. Wait, my bad, that's totally not what you asked about. Disregard.