So, I finally got my balanced headphone cables in the other day and have been testing out the Alpha Dogs with the Sonett for a few days now.
I have it on the low impedance setting, volume knob set to 7-8 and the sound is exceptionally good considering it is powering a set of somewhat inefficient planar's. I don't listen to a lot of bass heavy music, but even on some of the songs where there is notable bass it is very well defined and succinct without any bloat or compression to the sound. All sounds very spacial while listening to CCR's greatest hits album this morning, along with some Black Keys. Will try out some acoustic albums later along with some heavier hitting music just to see the little amps capabilities.
Sure the tubes need some burn-in love but color me thoroughly impressed considering the headphones I am using. The difference between the Asgard 2 and Sonett isn't even quantifiable, it just produces the sound better in all aspects and I love the sounds the GZ34 metal really bring to the table over solid-state amps. Adds some nice smoothness to the sound all around, mids are coming out perfectly and treble isn't hitting the highs enough to cause any fatigue after multiple hours of listening now.
Going to order up some of the 6N6P's to check out some differences, they don't appear terribly expensive. Really really curious now to hear the Stratus with LCD3's after hearing the Sonett.