The MHA200 is a compact vacuum tube headphone amplifier built around a pair each of 12AT7 and 12BH7A dual triode tubes and McIntosh's Unity Coupled Circuit output transformers. Four selectable impedance ranges from 32 to 1,000 ohms suit nearly any headphone, with balanced stereo, dedicated left and right balanced, and quarter-inch outputs provided. Balanced and unbalanced inputs connect it to a full-size system.
