At its heart, the voltage gain stage features the renowned ECC82 or the legendary military-grade 5814A double triode, harmonizing with hand-wound, wide-bandwidth output transformers to deliver extraordinary clarity, warmth, and musicality. Supporting a variety of compatible vacuum tubes—including ECC82, 5814A, 6189, 12AU7, 6AU6, 12AY7, 13D8, 6GU7, 6072, and 6CC40—the Mezzoforte MK II allows effortless tonal customization and tube rolling. No matched pairs are required, and high-precision operational amplifiers ensure consistent, stable performance.

Safety and reliability are paramount: the unit incorporates short-circuit and over-temperature protection. The Mezzoforte MK II can be positioned vertically, doubling as an elegant headphone stand, or horizontally as a conventional desktop amplifier.

Inputs include dual RCA and a balanced XLR, accommodating any line-level analog source from 0.5 Vrms to 5 Vrms. The Direct Mode function allows bypassing the internal volume control for maximum signal purity, enabling connection directly to a preamplifier or preferred DAC.

A double-filtered power supply with capacitance multiplier topology delivers exceptionally clean, stable power to all stages. The amplifier can simultaneously drive two electrostatic headphones and two dynamic or planar magnetic models via:

• Two STAX PRO electrostatic outputs
• One XLR-4 balanced output
• One 6.3 mm stereo jack

A three-step output voltage selector ensures optimal performance across all headphone sensitivities, from ultra-demanding models like the HIFIMAN Susvara to sensitive in-ear monitors.

The chassis, crafted from 3 mm non-magnetic aluminum, provides mechanical stability and shielding from interference. Every component is carefully chosen for longevity, reliability, and premium sonic performance, ensuring the Mezzoforte MK II delivers a consistently refined listening experience for years to come.