I'm looking for a tube amp with enough grunt to do justice to the Abyss Phi (and possibly the Susvara in the future). It's a short list of candidates that fit that description. With that in mind, I brought my Abyss Phis to the local shop this morning and gave the WA33 and Egoista 845 a nice listen-to (my 2nd time with the latter).
I really took to the Woo and found it immediately very engaging. Soundstage, imaging, dynamics, resolving-ness, instrument separation -- all really satisfying, and easily a couple steps up from the tube amps I've had up to this point. To my ears it had an even, slightly warmer tilt to its tonality (w/ the stock tubes) that suites my preferences. Also, I found it to have a treble sweetness that was appealing that I could tell would grow on me. In the end, I didn't need to listen to the amp for long.
The merits of the Egoista's technicalities were super-obvious, but I think the sound signature is something I'm still struggling to wrap my head around. It had a tube midrange sweetness/bloom which -- combined with its analytical-like speed and maybe more distant presentation? -- wasn't really clicking for me. Soundstage is really big and very interesting, but didn't sound "natural" -- or maybe it was just that it sounded unfamiliar. I could see it growing on me with a longer-term listen, but at the 845's price point, that may not be so likely.
Two more things about the Viva amp though. The instrument realism is crazy-good. Jazz percussion is just like... damn. The other thing is that I felt like it took turning up the volume to 75+ dBA for the amp to come into its own, but since I usually listen at the 65-75 range, I'm slightly afraid all that gorgeous glass, heat, and automotive paint might end up being wasted on me.
Anyway, I ended up having less to say about the Woo amp, but I could tell from my audition of it that I'd find it very satisfying to own.
Thanks for this I was looking into the 845 myself and the Pathos inpolear and the wa33. I already listened to the little brother of the vista and did not like the sound signature with the focal utopia's. To harsh... I then went and tested a lowly wa6 and preferred it to the more expensive vista... way more ... I was also looking into the Felix which focal recommends for the utopia's... but compared to this amp... I don't think they are in the same league though I think for the price point they are supposed to be excellent. So long story short I've settled on the wa33...