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A characteristic of the STEG D Class line of amplifiers is the very low distortion that they can maintain even at very low loads. Thanks to the LOW TOLERANCE OF THE PASSIVE COMPONENTS AND THE ACCURATE DESIGN OF THE LAYOUT, which minimize power losses and make excellent performance. The components used are of the selected type and of particular value, low tolerance resistors and capacitors are used, coupling capacity in high linearity polyester with low thermal drift and made specifically for audio applications. The choice of each individual device has been studied down to the smallest detail, each element finds its best location in the delicate electrical balances of the system in order to ensure exceptional performance, invariable over time.

NIKO 1.40000, designed for the most difficult SPL challenges where the power supply, load impedance conditions are truly extreme. Double power input connector. Clock frequency 50KHz stabilized PWM (10.5V). Use of 10 transformers with E-ferrite for maximum efficiency. 40 switching MOSFETs of 160 Ampere, 0.010 Ohm for a total of 6.400 Ampere. All managed by the microprocessor which, in addition to switching the mosfets, takes care of the management of the protections by constantly monitoring: 1) low input voltage, 2) high input voltage, 3) short circuit in the final stage 4) abnormal absorption in the final stage. We are the first in the world to use this switching power supply management system designed within our research and development laboratories, this means that the breakdown of the amplifier is reduced to zero even in conditions of extreme use. Series of high quality leveling capacitors for a total of 35200uF. Copper reinforcing bars, power connectors made from solid brass blocks and printed circuit board with 120um copper for very low power losses on high current paths.
This amplifier contains all the features to be the first in the class ...

The NIKO 1.40000 integrates various protection systems to control the following functions:

Output short circuit

Direct current across the speakers

Raising the temperature

Muting in the ignition transient

Supply voltage out of range

Intelligent "INTELLISPEED" fan control

Power input unbalance between the two connectors

The numerous "sensors" on the circuit send a continuous flow of data which is processed at very high speed, the protection system reacts instantly, intervening appropriately and signaling any malfunctions via the LEDs located on the control panel. The other protection system is managed by the modulator which monitors the switching circuit on the final stage.

GR.I.P.S. - Ground Improved Path System
In order to avoid the generation of ground loops in the connection between the radio and the power amplifier, numerous expedients and systems have been adopted in the past, including the separation of the amplifier mass from the car battery mass. This system has proven to be particularly effective and reliable, so much so that the major Hi-Fi car manufacturers have done so by adopting it in their own creations and using it up to today. In recent years, with the advent of electronic injections, this system begins to prove insufficient since it has greater efficacy on electrical disturbances but is less efficient than electromagnetic ones. Steg designed the GR.I.P.S. capable of reducing both types of noise, alternative to balanced lines, and with the advantage of not degrading the sound quality, while maintaining compatibility with existing connections. The GR.I.P.S. isolates each input mass from the others, avoiding the generation of rings even in multi-amplified, multichannel constructions and also reduces installation time, always ensuring maximum sound quality

INTELLISPEED - Intelligent cooling fans power regulator

The efficiency of the D ’’ Class cooling system is among the highest on the market. The extraordinary dissipation characteristics are the result of innovative design choices, including the Intellispeed dynamic forced ventilation system controlled by the microprocessor. The high dissipating power of the wing profile is combined with the effectiveness of the 6 fans integrated in the side tunnels, positioned so as to convey cold air to the most appropriate points. The integrated sensors continuously monitor the thermal / electrical conditions of the transistors and diodes, communicating with the microprocessor in real time. The control system, interpreting the measurements, reacts with the intelligent management of the fans, activating them when the heat sink temperature exceeds 40 ° C. With ventilation on, the software controls the flow, varying the speed of rotation of the fans according to the parameters acquired so as to always guarantee the best working conditions of the D ’’ Class.


Power 4 ohms monoWatt RMS - 11 to 14.4 Volt 15000 x 1
Power 2 ohms monoWatt RMS - 11 to 14.4 volts 25000 x 1
Power 1 ohm monoWatt RMS - 11 to 14.4 volts 40000 x 1

Volts RMS 0.2 V - 5 V

828 x 62 x 230 mm

10.47 Kg

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