The Mark Levinson ML-3 was a 200 watt per channel dual monaural Class AB2 power amplifier that used toroidal transformers. Produced between 1979 and 1987, the ML-3 consisted of two electrically separate amplifiers in one chassis, hence the name "Dual Monaural". It also featured discrete circuit construction; no integrated circuits were incorporated to keep the signal pure. The design was by Thomas P. Colangelo. The ML-3 constituted the archetype of an American highend, highpower amplifier. Specifications 200 W/channel at 8 ohms, 400 W/ch at 4 ohms, 800 W/ch at 2 ohms Maximum output: 45 volts 30 amperes Two 1.2 kVA Avel Lindbergh toroidal transformers, 4 Sprague 36,000 µF, 100 V capacitors and 40 output devices (20 per channel) Range: 20 Hz to 20 kHz with less than 0.2% total harmonic distortion Gold-plated CAMAC input connectors Adjustable AC voltage: No, factory set Adjustable output damping toggle switches (one per channel) (in later models only) Weight: 116 lb (56 kg) External links Mark Levinson Equipment History References Audio amplifiers