Beautiful world class monoblock amplifiers from NAT of Serbia. These are rugged designs that use high end parts throughout and are among the best amplifiers that money can buy. This is my last demo pair. The sound quality is amazing. The build quality is Russian military overkill. Tubes are long lasting and inexpensive to replace. These will be hard to beat at any price, let alone $6400 for the pair. They don't sound like your proverbial tube amp. They are dynamic, musical, neutral and crystal clear. They will drive any speaker--bring your electrostatics!
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Reference Mono Block Power Amplifier
The NAT Generator reference high power push-pull amplifier uses the 805 pure direct-heated triode output tube in a zero feedback design. With over 120W it is capable of driving any loudspeaker both dynamic or electrostatic.
Hand crafted symmetric wideband output transformers (custom designed for NAT) are used in this mono block. The output transformer contain no less then 63 separate layers per each output tube to total 126. Even the 700W power transformer contains 10 separate sections to supply each of amplifier stage.
Special care has been taken in designing all high voltage regulators including for the output tubes.
The Generator uses zero global negative feedback to equalize characteristics for all types of loudspeakers (to have similar characteristics on dynamic and electrostatic loudspeaker as well).
The driver stage employs special quality military grade 6N6P tubes all with a few thousand hours of operational life time.
This amplifier works properly at all world wide AC line voltage from 100-240 VAC, 50Hz to 60Hz.
The audio circuit is fully balanced although at the same level of sound quality the single ended input option is available too.
The Generator is such a type of power amplifier that could be easily driven directly from the source (CD, SACD...).
Specifications Name Value Type Push Pull Class "A" Power Output 120 Watts at 8 ohms, 1kHz Frequency Response 5 Hz to 100 kHz - 3dB at 8 ohms Input impedance 100 kohms Input Sensitivity 1.5 V RMS for full power output (unbalanced input) Gain 32 dB(x40) (unbalanced input) Rise Time 4.4 microseconds Noise 103 dB below rated output Tube Complement 3x 6N6P, 2xG811 Power Requirement 110 VAC or 220 VAC at 50 Hz to 60 Hz, 170VA at idle 500VA maximum Dimensions 11.8" (300 mm) wide x 20.4" (520 mm) deep x 12" (300 mm) high NET Weight approx. 66 lb. (30 kg) unpacked/ per piece TOTAL Weight approx. 90 lb. (40.5 kg) packed/ per piece
- mono block - low feedback configuration - all triode configuration - direct heated 805 output triodes - hand wound symmetric wide band output transformer (custom designed for NAT) - power transformer of 700W, full encapsulated- full regulated power supply for all stages (included the output stage) - both balanced and unbalanced input capability - soft start - hand assembled aluminum modulated chassis- double front aluminum panel of 0.8"(20mm) thick - extensively used computer numeric control machines (CNC)
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