I'm looking for my first tube amp to pair with my new Vérité and the Echo, Liquid Platinum, Valhalla and Mjolnir 2 are on my short list. Any thoughts from those that own these amps? I do like things more on the warm side, and do like good bass when it's present. Thanks.
I can only comment on the Echo and the Mjolnir 2 as those are the only ones I've owned. Also, opinions are coming from pairing with Auteur and other headphones since my Verites haven't arrived yet.
The Echo definitely has more of that "traditional" tube sound. Smoother treble, nice staging, added sweetness, hint of bloom in the bass, etc. It's a great listen. One of those amps where you get throw on your favorite playlist and just kick back and relax.
The Mjolnir 2 (Telefunken ECC88 tubes, don't remember the stock ones other than they weren't that great) on the other hand demands your attention. It's more extended in the top and bottom ends and a bit more dynamic with more slam.
With the Auteur I did prefer the Echo over the MJ2, but because the Echo was a bit specialized in what headphones can pair well with it (high impedance dynamics) I ended up keeping the MJ2 as it sounds great with everything, especially harder to drive planars like the Arya.
I've since moved up to higher end tube amps, but the Mjolnir 2 has stuck around. I don't own any SS amps currently because it's so versatile. If you only plan to stick with dynamics though, the Echo is probably the way to go.