Yes, the output impedance of the MZ2 and MZ3 (and all of our ZOTL amplifiers) is 2 ohms, which means that it should generally work well with any headphone or IEM above 16 ohms impedance, which is the majority of them.
LTA amps will also work silently, with no hum, with these headphones.
With especially sensitive IEMs, a slight hiss is apparent with no source input and the volume turned up, though if music were playing at that volume the drivers would probably be damaged and your ears definitely would be.
The second generation of the product that started LTA, the microZOTL MZ2 contains years of product development in one compact chassis. 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.