Viva or Mastersound?

To clarify I did upgraded from Solista mk2 to mk3 so I think it can be done for other users as well.

*David12 there is huge difference from Solista mk1 to mk3.
As for heating I also have Gryphon Antileon signature both run hot, only in the summer there is an issue.

I also have the same 845 tubes for 3 years.

Only changed 6sn6 for find different sound but not sure if it worth the change.
The only 6sn7 that was worth it is the black treasure from shuguang, but it does not fit to mk1 & mk2.

Hope I helped.

From everything I've read/heard, the Viva is really old school golden sound. Has that changed in the MK3

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