Mark Levinson No 531H Amplifiers mono-block

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The No 531H 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.

Main Features

  • Reliable, high-power in four different channel configurations provide ideal solutions for any system
  • 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
  • Ethernet and 12V trigger control capability for system integration
Inputsone balanced XLR input per channel; one unbalanced RCA input per channel
Speaker Connectionsone pair “Hurricane” loudspeaker outputs with banana-plug sockets per channel (banana-plug socket not available on the 230 VAC models)
Communication and Controlone 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
Rated Output Power into 8 ohms300W/ch (20Hz to 20kHz at <0.5% THD)
Frequency Responsewithin 0.5dB from 10Hz to 20kHz
Signal-to-Noise Ratio>85dB, reference level: 2.83 Vrms
Input Sensitivity2.83Vrms output at 130mVrms input
Gain26.8dB
Input Impedance60 kΩ (balanced); 30 kΩ (unbalanced)
Power Requirements100V~, 120V~, 230V~, factory set for destination country;
Power Consumption300W
Height(with feet): 7.65" (19.4cm); (without feet): 6.97" (17.7cm)
Width17.75" (45.1cm)
Depth19.83" (50.4cm)
WeightNet Weight: 52.5lb (23.8kg); Shipping weight: 62.5lb (28.4kg)

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