Alligator
How is that "faceplate" looking? Is it a prototype? Yes indeed - It's Ralfs! The technology - 12AT7, 12AX7, 4x EL84. How exactly? Secret secret! As far as I know, a paraphase PI with a power amp similar to an AC30. A monstrous machine. The principle of many 8" can often be found. Every little helps.