NAT Transmitter EVO – up to 80 W of tube power!
09.11.2022 18:00 | ~2 minutes read
The Serbian company NAT Audio has introduced the NAT Transmitter EVO tube monoblock amplifier – the best amplifier in the Transmitter series to date, according to the manufacturer. The output stage of the NAT Transmitter Evo amplifier can operate in two modes – high power up to 80 W or low power up to a moderate 40 W. Both modes use a directly heated triode in a single-ended connection. With a power of 80 W in a single-ended configuration, it is possible to choose almost any speaker system as a partner - NAT Transmitter EVO is capable of working with speaker systems with an impedance of 2 to 16 Ohms.
The output tube in the NAT Transmitter EVO monoblock is a Philips QB5/1750, capable of dissipating up to 565 W of energy. The Transmitter EVO amplifier uses only 35% of the maximum dissipation power, which significantly reduces the operating temperature for increased reliability. The design of the output tube is very robust mechanically, which resulted in sound reproduction without the microphonic effect. The specially designed amplifier housing, made of stainless steel, further improved vibration isolation from the environment, which contributes to an increase in sound detail.
The input and driver tube (6N6P) in the Transmitter EVO is NOS, manufactured according to military standards. The amplifier uses a wide-band output transformer specially designed for NAT. The power supply of the NAT Transmitter EVO amplifier is designed for twice the power consumed by the device when operating at maximum output power. Separate voltage stabilizers are provided for all stages of the amplifier, including the output one. Thanks to the automatic bias current circuit, no adjustment of the output tube current is required. The NAT Transmitter EVO monoblock uses the highest level components - military-grade graphite resistors, Ohmite resistors, Vishay 0.1% resistors, Cornell-Dublier capacitors with ultra-low equivalent series resistance, electrolytic capacitors rated for operation at temperatures up to 105°C, the latest generation of semiconductors, laboratory-grade connectors, input wiring made of pure silver.
The basic version of the NAT Transmitter EVO power amplifier, along with an unbalanced input on the RCA connector, is equipped with a pseudo-balanced input on the XLR connector. The manufacturer offers two options for upgrading the amplifier - the first stage is the implementation of a purely balanced input using a hand-wound nanocrystalline transformer. The second stage involves the use of a transformer wound with copper-free silver wire for this purpose.
Specifications
This product is in the Hi-Fi and High End Electronics and Acoustics database
Power amplifiers mono — NAT Transmitter EVO
Model name
Transmitter EVO
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
N/A
Output power (4Ω) (W)
80
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
8
Frequency response high +/- 3dB (Hz)
60000
Signal to Noise Ratio (dB)
110
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
N/A
Max power consumption (W)
N/A
Damping factor
N/A
Dimensions (mm)
360 x 640 x 310
Weight (kg)
40
Official link
Image from https://www.nataudio.com
More content
Bärbox B.01 – Speakers in Solid Wood Cabinets
The German company Bärbox has released new acoustic systems Bärbox B.01 – slender two-way floor-standing loudspeakers are designed in solid wood cases and operate in the frequency range from 38 to 20,000 Hz (at 87 dB sensitivity and 4 Ohm impedance). The downward-facing phase inverter port allows for maximum flexibility in the placement of the speakers in the listening room.
FiiO K15 – an Inexpensive DAC with a Headphone Amplifier
FiiO plans to release a new DAC with a headphone amplifier and a preamplifier FiiO K15. Detailed performance characteristics of the new product will be announced after the presentation at the CanJam exhibition in London - but it is already known that the model will go on sale in August 2025 for an affordable 599 euros. Of course, FiiO K15 supports Hi-Res up to PCM 32/768 and DSD512.
D&A Alpha PRO – Digital-to-Analog Converter with Zero-Jitter Clock Architecture
D&A (Digi & Aesth) has introduced a relatively inexpensive ($699) digital-to-analog converter with headphone amplifier D&A Alpha PRO. Alpha Pro was developed on the basis of the flagship ESS Technology ES9039MSPRO chip, it supports signals up to PCM 32/768, DSD512 and hardware decodes MQA.
Cyrus 40 PPA – the Latest Phonostage is Now Available
Cyrus Audio has officially unveiled the Cyrus 40 PPA phono preamplifier – the model has been previously demonstrated at exhibitions and is now available for sale at a suggested retail price of €2,499 or $2,899.
Cambridge Audio EVO 150 SE – Meet the Updated Amplifier
Cambridge Audio has released an improved version of its famous network integrated amplifier – this month the Cambridge Audio EVO 150 SE will go on sale. The device uses Class D amplification based on NCOREx “Tuned by Cambridge” modules and delivers 2 x 150 watts to 8 ohm speakers. The amplifier is equipped with a built-in digital-to-analog converter based on the advanced ESS Technology Sabre ES9018K2M chip.
