Aleph 1.2

About the Aleph 1.2

The Aleph 1.2 is the largest and most powerful amplifier in the Aleph series by Pass Laboratories, designed by Nelson Pass. It operates in pure single-ended Class A mode with a unique current source topology that optimizes performance across a wide range of speaker impedances. The amplifier delivers 200 watts into 8 ohms with a very simple signal path consisting of only two gain stages, minimizing distortion and preserving sonic purity. It idles at 500 watts, producing significant heat and requiring substantial power, reflecting its low-efficiency Class A design. The amplifier features balanced XLR and single-ended RCA inputs, gold-plated binding posts, and a robust build with large heatsinks. It is renowned for delivering detailed, spacious, and authoritative sound rarely found in semiconductor amplifiers, combining the clarity of solid-state with the musicality of tube amps. The Aleph 1.2 weighs approximately 130 lbs and measures 16.5" x 16.5" x 10.5". It was introduced around 1997 and remains a highly regarded vintage Class A monoblock amplifier.