Here is a sound demo driving your headphone with Primavera and Woo wa33, maybe you will be able to make a comparison among them and VivaHello everyone,
Finally, if I should keep only one headphone and only one amp it would currently be the headphones Kennerton Thror and the Viva 2A3 amp.
The Thror headphones because it is the most performing (technically speaking) and universal (open to all musical genres); the Viva 2A3 amp because it magnifies the medium and treble of the Thror giving it a harmonic richness extremely pleasant to listen to: its rich, detailed, subtle and balanced.
The XI Audio Formula S amplifier (SS amp), more neutral, but less rich in harmonic than the Viva 2A3 amp is better suited to the Odin mk2 or mk1 which are already rich in harmonics.
I keep my Odin mk2 in Karelian birch, for fun, and by collection spirit (nb: the Karelian birch wood is so beautiful to look at).
Association of the Odin mk2 with the Viva 2A3, when first time listening, giving more fun because more colorful and rich in colors than the Thror ; association more unbridled too.
The Thror in comparison, in first time listening, less fun, is much more rigorous and serious, and even more universal.