No. 33H

About the No. 33H

The Mark Levinson Nº33H is a monaural power amplifier rated at 150 watts continuous RMS power into an 8-ohm load and 300 watts into 4 ohms, designed to deliver extraordinary power to complex loudspeaker impedances. It features a massive 3.417 kVA toroidal transformer housed in a vertical chassis measuring 18.5 inches high, 11 inches wide, and 23 inches deep, with a weight of approximately 220 pounds per unit. The amplifier offers a frequency response within 0.2 dB from 20 Hz to 20 kHz, a signal-to-noise ratio better than -80 dB (ref. 1W), and a voltage gain of 26.8 dB. Input impedance is 100 kΩ balanced and 50 kΩ single-ended, with an input sensitivity of 1.59 V for full rated output. Output impedance is less than 0.05 Ω from 20 Hz to 20 kHz. Power consumption is typically 540 watts at idle and 210 watts in standby mode. Connectivity includes balanced XLR and single-ended RCA inputs, custom binding posts for speaker connections, trigger in/out jacks, and Mark Levinson Linking communication ports. The amplifier is noted for its exceptional dynamic and transient response, delivering iron-fisted, bottomless, and perfectly controlled bass with excellent pitch definition, maintaining clarity and control even at high playback levels. Its design emphasizes both form and function, with large heat sinks for effective thermal management. The Nº33H is highly regarded for its ability to provide rhythmic pacing and immersive musical experience, making it a perfect match for high-efficiency speakers.