Mark Levinson

Nº52

Stereo Preamplifiers

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OVERVIEW

Raising the Standard for Ultrahigh-end Luxury Audio

The Nº52 is unquestionably the finest Mark Levinson preamplifier ever. This dual-monaural preamplifier isolates the critical analog audio circuitry from the control section by utilizing a two-chassis approach to provide the purest signal paths possible.

The Nº52 features seven analog inputs – three balanced XLR and four unbalanced RCA – as well as a dedicated phono input configurable for moving-magnet (MM) or moving-coil (MC) operation. Two sets of pre-outs are duplicated in both XLR and RCA jacks, while an additional auxiliary pair of XLR and RCA outputs is configurable, for fixed or variable output with independent source selection. This function allows the auxiliary output to function as a third pre-out, a pass-through full-range subwoofer output or a record output.

The Nº52 comes with a unity-gain SSP mode that integrates the connected sources into a home theater system while still maintaining optimal and independent stereo operation for music. System controls include Ethernet, Mark Levinson’s proprietary ML Net, and 12V trigger and IR control ports, as well as a USB connector that can facilitate software updates. Additionally, the included remote control also operates both the Nº52 and other connected Mark Levinson components.

The peerless craftsmanship of Mark Levinson is evident in every aspect of the Nº52. Within the control section, mirror-imaged DC power supplies and AC regeneration circuitry optimize power for the cleanest, most stable signals possible. Individual DC power cords supply power to the audio section in the second chassis to prevent extraneous noise from passing into the DC power signals, while communication and control signals are sent along a dedicated third cable to the audio section. The audio chassis is also configured in a mirror-image, left/right design with isolated, independent PCBs for volume control and for main and auxiliary signal paths. The communication signals are contained in a shielded central compartment, as is each channel of the phono input. Heavy aluminum extrusions and thick aluminum plates solidify the chassis and provide an optimized foundation for the audio circuitry.

Features and Benefits

• Two-piece chassis with separate control box and analog box

• Dual Monaural construction and signal paths/routing

• AC regeneration circuitry

• 7 Analog inputs: 3 XLR and 4 RCA stereo input pairs

• Phono input with support for both MM and MC cartridges

• Aux output path: 1 XLR and 1 RCA stereo pairs w/ fixed/variable volume and independent source selection

• Main outputs: 2 XLR and 2 RCA stereo pairs (identical w/ volume)

• Ethernet, RS-232, IR and 12V trigger system control ports

• Rear-panel USB (A) connector for software updates

• System remote control


SPECIFICATIONS

Description Reference Dual-Monaural Preamplifier
Phono Inputs Input Overload (phono): >100mV @1kHz (40dB gain); >10mV @1kHz (60dB gain)
Communication and Control Volume Control Range: 80.0dB
Frequency Response Frequency Response (line-level): 10Hz – 40kHz (±0.2dB); Frequency Response (phono): ±1dB (RIAA response)
Signal-to-Noise Ratio Residual Noise: <120dB (20Hz – 20kHz, input terminated,balanced)
Total Harmonic Distortion (THD) <0.001% (balanced line-level); <0.02% (phono)
Crosstalk <120dB (any input to any output, input unterminated); <140dB (any input to any output, input terminated)
Gain Gain (line-level stage): 0dB, +6dB, +12dB, or +18dB (user-selectable) -- Gain (phono stage): +40dB, +60dB @1kHz (user-selectable) -- Gain Resolution: 1.0dB increments up to 23.0dB on display (–57dB to –80dB); 0.1dB increments above 23.0dB on display (0dB to –57dB)
Maximum Output Level 16V – balanced (XLR) connectors; 8V – unbalanced (RCA) connectors
Input Impedance Input Impedance (line-level): 100k ohms -- Input Impedance (phono): Resistive: 3.3Ω, 5.0Ω, 7.7Ω, 10Ω, 33Ω, 50Ω, 77Ω, 100Ω, 330Ω, 47kΩ, (user-selectable) Capacitive: 50pF, 100pF, 150pF, 200pF, 250pF, 300pF, 350pF, 0.01μF (user-selectable)
Output Impedance 20 ohms – balanced (XLR) connectors; 10 ohms – unbalanced (RCA) connectors
Power Requirements Operating Voltage: 100V – 240VAC, 50Hz/60Hz
Power Consumption 65W (maximum)
Height 8.75" (22.2 cm) [Control = 3.25" (8.2 cm); Audio = 5.5" (14 cm)]
Width 17.25" (43.8 cm)
Depth 13" (33 cm)
Weight 60 lb (27 kg) [Control = 25 lb (11 kg); Audio = 35 lb (16 kg)]

REVIEWS

2014 "Outstanding Product" - HiFi News

2014 "The Audio Excellence Award" (Silver Award, Preamplifier Category), Omgen Publishing (Japan)

2013 "High-end Audio of the Year" Award, Stuff Vietnam

2013 "MJ Technology of the Year" Award" - Amplifier Category, MJ Audio Technology (Japan)

2013 "The Stereo Sound Grand Prix" Award, Omgen Publishing (Japan)

DOWNLOADS

No52 Owner's Manual (English)
No52 Quick Start Guide - English
No52 Quick Start Guide - French
No52 Quick Start Guide - Spanish
No52 Quick Start Guide - Korean
No52 Quick Start Guide - Japanese
No52 Quick Start Guide - Chinese
No52 Quick Start Guide - Danish
No52 Quick Start Guide - Dutch
No52 Quick Start Guide - Finnish
No52 Quick Start Guide - German
No52 Quick Start Guide - Italian
No52 Quick Start Guide - Portuguese
No52 Quick Start Guide - Russian
No52 Quick Start Guide - Swedish
No52 Software Update - v1.08
No52 Software Update v1.09. Released August 2013.
HiFi News Mark Levinson No52 Review


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