Silver Supporting Member
What are the differences in tone, gain, microphonics, etc.?
I have owned 3 Rivera's, including an M60, and found them all to take to tube changes well. I was surprised how easily I could pick out the tonal differences in the pre's that were loaded up.I put 4 Mullard long plates in my dad's Rivera M60 over the weekend.
Dear god, such richness, definition, attack, sustain, warmth, all the buzz words.
One just cannot stop playing that amplifier now.