NAT Audio - Magnetostat SE Vorverstärker

Both packs of active devices are of high grade and have high reliability.

Hand crafted wide-bandwidth output transformer (custom designed for NAT ) is used in this unit.

Open bandwidth of output transformer is from 1Hz – 700.000Hz. That is extremely excellent for high direct current single ended transformer coupled operation mode. Even the square wave response is near perfect that indicate high quality amplification. Output has separate selectable tap for single ended and balanced operation!

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).

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)

• 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