Vacuum Tube Line Stages
Magnetic Evo
NAT Audio introduced Magnetic Evo - Reference Absolute Zero Feedback Line Stage. Magnetic Evo is the successor to the long produced Magnetic Line Stage.
Vacuum Tube Line Stages
Magnetic Evo
Reference Zero Feedback Balanced Line Stage
Hand coiled wide-bandwidth output transformer (custom designed of NAT ) is used in NAT Magnetic Evo unit.
Open bandwidth of single ended output transformer is from 3Hz – 300.000Hz. That is extremely excellent for high direct current single ended transformer coupled operation mode. Even the square wave response of NAT Magnetic Evo is near perfect that indicate high quality amplification. Output has separate selectable tap for single ended and balanced operation as well (reconfigurated) !
By specific technical approach mention output nano-crystalline core transformer and special selected super tiny military grade long life vacuum tubes may easy drive any type of interconnect even very long length cable.
Zero feedback concept is well known as the best solution for purity of sound reproduction without negative influence from feedback circuit. There is no any capacitor on direct signal path - resulted to absolute zero feedback operation.
Attenuation in NAT Magnetic Evo is based on high reliability relay (pure silver with gold plated contacts) network that is computer controlled. There is 96 position of attenuation. Single laboratory foil grade resistor is on the signal path at any attenuator step.
NAT Magnetic Evo is equipped with remote control unit made from solid block of aluminum.
Power supply section also speak for itself. High capacity (approx. 200.000 uF of capacitance) supply is used as the best solution for power supply section. There is more then 400 joules of energy storage!
It is true dual mono construction of NAT Magnetic Evo - totally separate one channel from another.
There is separate transformer as well as voltage regulators for all additional (for non signal path) stages.
Sound quality of NAT Magnetic Evo is totally independent from line voltage instability and from negative influence of wide variety noise that could be coupled across.
There is a built-in measurement for total hours of line stage accumulated work (may use of tube duration) that is presented by led diodes universal meter (led indicator on front panel).
Quality of electronic material that is used inside NAT Magnetic Evo is on high level - special selected super miniature military long life grade tubes, 0.1% with 5ppm foil resistors, power 20ppm military grade resistors, high quality nano-crystalline transformer core, electrolytic capacitors of very high capacitance with 105C working temperature, gold plated PTFE (Teflon) isolated connectors, silver-ofc PTFE (Teflon) input wiring…
NAT Magnetic Evo works properly at all world wide AC line voltage from 100 – 250 VAC, 50-60Hz (set in factory only).
- transformer coupled SINGLE STAGE circuit (without any capacitor on signal path)
- absolute zero feedback circuit
- approx. 200.000uF of capacitance in analog power supply section
- pure dual mono construction
- custom designed wide-bandwidth nano-crystalline core output transformers (with near perfect square wave response)
- vacuum special long life tiny tubes by military specification as well as N.O.S. grade
- separate power units for digital control and analog supply
- relay network attenuation (shunt type realized with 56 high quality silver-gold plated contacts relays)
- remote control made from solid block of aluminum
- all modulated chassis
- front panel made from 20mm thick aluminum material
- built-in measurement for total working hours of line stage
- PTFE (Teflon) insulated gold plated connectors
- PTFE (Teflon) based PCB as well as input wiring
Specifications are subject of change without notice
Technical Specification | |
Name | Value |
Type | Absolute Zero Feedback Pure Tube |
Operation | Pure Single-ended (RCA) or Pure balanced (XLR) |
Frequency Response | 1.6 Hz to 250 kHz, -3 dB; 20Hz to 20kHz, +/-0.05dB |
Noise | 100 dB IHF reference to 1V |
Gain | 17dB (X 7) XLR |
THD & N | <0.06 % |
Input Impedance | >20 kohms @ balanced (XLR) input |
Output Impedance | <100 ohms @ RCA, <200 ohms @ XLR |
Stereo Separation | >100 dB (dual mono) |
Polarity Status | Invert phase (180 degree) |
Power Requirements | 100VAC to 240VAC (50 to 60 Hz), max. 50 VA |
Dimensions | 19" (483 mm) wide ´ 16” (400 mm) deep ´ 8.7" (220 mm) high |
NET Weight | Approx. 66 lbs (30 kg) unpacked |
TOTAL Weight | Approx. 93 lbs (42 kg) packed in flight case |
