Hmm. A lot of talk about how awesome its specs are, and not much about how it sounds.
About halfway down their page I found some clips. Listening now through Skullcandy earbuds, I'm not blown away. The stereo micing ("Right channel: Shure SM57 dynamic microphone placed 12 inches off-axis below and in front of Marshall 4x12 with Vintage 30 speakers, in anechoic / dampened room. Left channel: AKG C-3000 studio condenser microphone set 2 meters away in same room.") just makes the whole thing sound odd, and the focus is mostly on cleaner tones.
This worries me, TBH. This guy is a high fidelity stereo amplifier developer, and is trying to leverage that into amplifier design. Yet, for the past 60 years of electric guitar, part of the sound of rock guitar HAS been the very innefficiencies in an amplifier circuit. A Marshall plexi is nowhere near full frequency - that's half the point.
GAGA-50 offers all-tube "wideband" amplification to unmatched extreme as it more perfectly matches output power tubes to speaker loads. Low frequency response is flat down to near DC and flat up to well above 20kHz
"They can kill you, but the legalities of eating you are a little dicier." - David Foster Wallace (1962-2008)