Our first product was a re-introduction of David Berning's MicroZOTL amplifier, which we named the MicroZOTL2.0.
Since then we've made many small and several larger changes to the case and components we use, but we have always used and continue to use Berning's original circuit. When we added an improved power supply, that product eventually took on the name "MicroZOTL2.0 Deluxe".
When we decided to use NOS 12SN7 tubes and manually alter the circuit to allow this, we created the "MZ2-S" around this, with a further upgraded power supply and some other improvements.
Eventually we replaced the manually altered circuit boards with jumpered boards, which negated the need for completely separate products, and we decided to discontinue certain aspects of the MicroZOTL2.0, like the locking headphone jack and the color scheme, while making other features that the MZ2-S had introduced available as options for any order. The "S" went from denoting these upgrades to essentially meaning the same thing that "Deluxe" had before it; an amp with an upgraded power supply.
The "MZ2" therefore took the place of the "MicroZOTL2.0", as our amps were now markedly changed from what the MicroZOTL2.0 had until then been.
To make all of this more confusing, many people still refer to any model as a MicroZOTL. The most important thing is that we'll make sure you get the features you want regardless of what it's called in the process.
The second generation of the product that started LTA. Built on the 6SN7 tube, the MZ2 remains the reference introduction to the unique ZOTL circuit.
Small and mighty. The highest expression of the patented microZOTL technology as a headphone amplifier, a preamplifier, and integrated amplifier in a desktop-sized package.