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The NAT Audio Magnetic Preamp is a high-end reference line stage designed by NAT Audio, featuring a transformer-coupled, class A zero feedback circuit configuration. It uses specially selected vacuum tubes representing advanced industrial tube manufacturing technology. The preamp employs a hand-crafted wide-bandwidth output transformer custom designed for NAT, with an open bandwidth from 1Hz to 700,000Hz, ensuring extremely high-quality amplification and near-perfect square wave response. It supports both pure single-ended (RCA) and pure balanced (XLR) operation with separate selectable taps. The zero feedback design eliminates capacitors on the direct or indirect signal path, preserving sound purity. Attenuation is managed by a computer-controlled relay network with 96 positions, using only one laboratory-grade resistor on the signal path at any step. The power supply section includes approximately 500,000 uF of capacitance, providing over 550 joules of energy for stable operation independent of line voltage fluctuations. The preamp is built with pure dual mono construction, high-quality electronic components including military-grade tubes, 0.1% Vishay resistors, nano-crystalline transformer cores, and gold-plated teflon connectors. It features a remote control made from a solid aluminum block and a built-in meter displaying total working hours of the tubes. The chassis is fully modulated with a 15mm thick aluminum front panel. The Magnetic preamp is designed to work worldwide on AC line voltages from 100 to 250 VAC at 50-60 Hz (factory set).
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Harmony's signal-to-noise is 102 dB against the Magnetic's 100 dB, its output impedance 1000Ω against 600Ω, and its input impedance 1000Ω against 20000Ω. Both share class (A).
Both turn up in the same documented systems.
The Symmetrical's signal-to-noise is 95 dB against the Magnetic's 100 dB, its thd 0.030% against 0.060%, its output impedance 70Ω against 600Ω, and its input impedance 47Ω against 20000Ω.
The VK-85's signal-to-noise is 96 dB against the Magnetic's 100 dB, its thd 0.010% against 0.060%, and its output impedance 200Ω against 600Ω. Both share class (A).
The REX's thd is 0.005% against the Magnetic's 0.060%, its output impedance 200Ω against 600Ω, and its input impedance 100Ω against 20000Ω. Both share signal-to-noise (100 dB).
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