Inovative Audio Manufacture

Vacuum Tube Line Stages

Magnetostat Se

Reference Absolute Zero Feedback Vacuum Tube Line Stage

Our flagship linestage!

Magnetostat Se set new reference point for the line stage device made by NAT as transformer coupled pure triode class A with absolute zero feedback circuit. Special military grade type 6S46G-V (tiny unique tube with lowest internal impendance) output tubes are used.


Magnetostat Se represent two independent preamplifier in the same chassis first - as balanced and second as single-ended type of operation!

Construction of tiny special tube 6S46G-V is very unique - as the lowest internal impedance triode as possible.

Hand coiled is used in Magnetostat Se with silver-ofc PTFE (teflon) type isolated wire on wide-bandwidth nano-crystalline core output transformer.

Open bandwidth from 0.5Hz – 800kHz is one of the best (if not) for high direct current single ended transformer coupled operation mode. Output transformer has separate configuration for single ended sa well as balanced operation!

Magnetostat Se as absolute zero feedback device represent the best solution for the purity of sound reproduction. There is no any capacitor on signal path.

Attenuation is based on 56pcs. of high reliability double microprocessor controlled relay (with pure silver, gold plated contacts) network with 96 different level of attenuation! Only a single laboratory grade resistor per phase is on the signal path at (any attenuator level).  

Magnetostat Se is equipped with hand assembled remote unit - made from laminate combination of different material.

High capacity - long live battery supply is used as the best solution for the power to supply Magnetostat Se. Even the entire tubes filament supply is realised with battery (as well as main HV)!

Sound quality of Magnetostat Se is totally independent from line voltage fluctation as well as influence of "rf pollution" that could be coupled across.

Separate transformer-conditioner unit act as power supply for digital and control circuit only.

Quality of electronic material that is used inside Magnetostat Se are at high level - tubes by military and N.O.S. grade, 0.1% Vishay resistors, nano-crystalline transformer core, silver-ofc teflon (PTFE) type of wire for the output transformer, audiophile grade high capacity electrolytic capacitors, gold plated teflon (PTFE) isolated connectors, silver-ofc input wiring…

Line stage works properly at world wide AC line voltage from 100 – 250 VAC, 50-60Hz (different transformer supply unit are used - set in factory only).


Technical Specification
Name Value
Type Absolute Zero Feedback Triode
Operation Single-ended (RCA) or balanced (XLR)
Frequency Response 1.5 Hz to 600 kHz, -3 dB; 20Hz to 20kHz, +/-0.02dB @ (RCA connection)
Noise <112 dB "A" weighted
Gain 14 dB (X 5) @ RCA or XLR output
THD & N <0.08 % @1V output
Input Impedance >20 kohms
Output Impedance <90 ohms @ (RCA connection)
Stereo Separation >100dB @ 10 kHz
Tube Complement 4 x 6S46G-V per unit (N.O.S. & military grade)
Power Requirements 115 VAC or 230 VAC @ 50 to 60 Hz, max. 50 VA
Dimensions 19" (483 mm) wide , 16.9" (430 mm) deep , 7.2" (185 mm) high (max. dimensions)
NET Weight approx. 73 lb. (33 kg)/unit + 6.6 lb. (3 kg)/power supply
TOTAL Weight approx. 106 lb. (48 kg) packed

Design Features

- transformer coupled circuit (without any capacitor on signal path)
- absolute zero feedback design (unique construction)
- fully battery supply - that includes high voltage as well as filament supply of all tubes
- automatic battery recharge function
- custom designed wide-bandwidth output transformers
- output transformers realized with hand coiled silver-ofc wire on nano-crystalline core
- 6S46G-V special selected tubes (N.O.S.) and military grade in amplification section
- aero-space grade hermetic foil input resistors
- separate transformers for digital control and recharge function
- attenuation network form silent reed relay (56pcs.) – encoder rotation knob type
- choke input for additional filtration for charge section
- built-in measurement for total hours of tube life accumulated
- gold plated teflon (PTFE) insulated RCA jacks with gold plated XLR balanced connectors
- hand assembled all modulated chassis
- front panel made from triple separate aluminum block of 20mm thick
- remote control made from laminate combination of different material
- extensively used computer numeric control machines (CNC)

Specifications are subject of change without notice


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