Nat Audio Generator Push pull mono block tube amplifier (170 w)

NAT proudly introduced Generator reference high power push-pull amplifier on the base of 811 pure direct-heated triode output tube, yet zero feedback design.

With power of over 170W there is capability for driving any loudspeakers both dynamic or electrostatic type.

Hand crafted symmetric wideband output transformer (custom designed for NAT) is used in this mono block. Output transformer contain no less then 63 separate layers per each output tube sum to 126 in total. Even power transformer of 700W contain 10 separate sections to supply each of amplifiers stage.

Special care has been taken in designing all high voltage regulators including for the output tubes.

The Generator is using zero global negative feedback primary to equalize characteristics for all type of loudspeakers (to have similar characteristics on dynamic and electrostatic loudspeaker as well).

Driver stage employ special quality military grade 6N1P-EV, 6N2P-EV & 6N6P tubes all with 10 000 hours of operational life time.

Audio circuit is absolutely 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 simple driven directly from the source (CD, SACD...).



Technical Specification
Type
Push Pull Class "AB"

Power Output
170 Watts @ 8 ohms, 1kHz

Frequency Response
5 Hz to 90 kHz - 3dB @ 8 ohms

Input impedance
100 kohms

Input Sensitivity
1 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 6N1P-EV, 6N2P-EV, 6N6P, 2xG811
Power Requirement 110 VAC or 220 VAC @ 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

Design Features

- push pull type
- mono block concept
- low feedback configuration
- all triode configuration
- direct heated G811(811A) output triodes (military grade)
- 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 operate
- hand assembled aluminum modulated chassis
- double front aluminum panel of 0.8"(20mm) thick
- extensively used computer numeric control machines (CNC)

Feel free to call us if you have any question about this preamplifier or would like to discuss about price.

We are open for audition and set up few system for you to enjoy and have fun.