Among boutique technology companies there is esoterica, and then there is esoterica. Zachary Vex falls into whichever category is more extreme.
We learned of ZVEX's wares last winter upon encountering its "Nano Head," which it described as "the world's smallest production tube amp." Its mission has apparently continued undaunted, for we now see that it has created "the world's smallest vacuum tube stereo power amplifier" (pausing to inhale). There must be so much competition in developing these products.