The Nº531H runs a single 300W channel into 8 ohms for unsurpassed dynamics and transient responses with today’s demanding audio formats, and stability with even the most difficult to drive loudspeakers.


The Nº531H and Nº532H are both true mono-block designs with independent power supplies for each channel and are rated at 300W per channel into 8 ohms. The transformers and power supply designs deliver unsurpassed dynamics and transient responses for today’s demanding audio formats and provide stability with even the most difficult to drive loudspeakers. Fully differential circuitry ensures that balanced input signals stay that way throughout the signal path and traditional Mark Levinson “Hurricane” binding posts offer secure termination to the loudspeaker.

The four amplifiers in the No500H Series are the definition of truly outstanding performance in their respective categories. Drawing from the Mark Levinson heritage, while utilizing a new, straightforward, balanced, current-feedback design creates a new series of amplifiers that must be listened to in order to be fully appreciated. The final result is impressive even for the Mark Levinson high standard of excellence.

Frequency Response

within 0.5dB from 10Hz to 20kHz

Input Impedance

60 kΩ (balanced); 30 kΩ (unbalanced)

Input Sensitivity

2.83Vrms output at 130mVrms input


(with feet): 7.65" (19.4cm); (without feet): 6.97" (17.7cm)


17.75" (45.1cm)


19.83" (50.4cm)


Net Weight: 52.5lb (23.8kg); Shipping weight: 62.5lb (28.4kg)

Communication and Control

one Ethernet 10Base-T port; one 3.5mm mono (tip/sleeve) mini plug trigger input, 3-12Vdc; one 3.5mm mono (tip/sleeve) mini plug trigger output, 3-12Vdc; 3-pin IEC standard power connector


One balanced XLR input per channel; one unbalanced RCA input per channel

Rated Output Power into 8 ohms

300W/ch (20Hz to 20kHz at



Power Requirements

100V~, 120V~, 230V~, factory set for destination country;

Speaker Connections

one pair “Hurricane” loudspeaker outputs with banana-plug sockets per channel (banana-plug socket not available on the 230 VAC models&#41


  • Reliable, high-power in four different channel configurations provide ideal solutions for any system
  • Ethernet and 12V trigger control capability for system integration
  • Isolated chassis and signal grounds minimize noise, optimizing detail, even at low listening levels
  • Fully-differential circuitry with both balanced XLR and single-ended RCA inputs

Awards & Accolades

  • 2011

    "Best of" Award ("Best High End Power Amp" Category)

    Secrets of HT & HIFI

  • 2011

    Review by Jim Clements

    Secrets of HT & HIFI

  • 2011

    ADEX Award for No500H Series Amplifiers

    Design Journal