The DUO GT “Grande Twin” is the third evolutionary stage of a horn system that has been in Avantgarde Acoustic’s portfolio since 1993. The proven innovative spherical horn architecture combined with the improved XM2 midrange driver, the new XT3 Supertweeter from the TRIO and the XB12 bass drivers with huge voice coil from the SpaceHorn.



Driven by its impressive 670 mm spherical wave horn with a frequency response up to 170 Hz, the DUO is the epitome of performance and dynamic elegance. In the fascinating world of spherical wave horns, size is the defining criterion. The larger the horn, the deeper its lower bandwidth and the more the listener is drawn into the maelstrom of superior performance.

The EvolutionAA XM2 midrange driver – a 170 mm chassis with a powerful Alnico magnet – is designed for a large linear diaphragm excursion. Its new ‘Soft Mesh Compound’ cone uses a robust mesh body as the basis of its construction. The microscopic openings in the mesh are sealed with a damping elastomer coating. The combination of the strong mesh structure and the flexible coating creates a broadband absorption effect that effectively dampens partial vibrations of the diaphragm and thus unwanted harmonics.
The DUO GT uses the XT3 tweeter from the TRIO G3. The XT3’s lighter, annular diaphragm extends the frequency range up to 28,000 Hz at a sensitivity of 107 dB, providing greater clarity, focus, and a fuller, more natural sound.

By using two powerful XB12 drivers in a bass-reflex configuration, the dynamic headroom of the bass has been virtually doubled compared to its predecessor. We have increased the voice coil from 100 mm of the previous model to 153 mm. This gigantic motor structure with a diameter of 6 inches achieves superior values of the power factor and power handling. At the same time, thermal compression is significantly reduced.

The G3-1000 bass amplifier delivers 1,000 watts and features an advanced digital sound processor. The new user interface makes it easy to adjust the sound to suit individual preferences and to integrate the system seamlessly into a wide variety of rooms.

Rotate view


Excellence reinvented.

In the G3 Series, we have taken the bionic horn principle to the extreme. Highly bred horn performance through unrestrained efficiency with a huge transmission range.

107dB Efficiency

A new generation of Evolution drivers for enhanced dynamics and an even purer sound.

200 mm - Supertweeter

Innovative XT3 tweeter unit with new Long Throw Horn and extended Supertweeter frequency range with record low distortion values.

670 mm spherical wave midrange horn

New improved XM2 DUO Evolution driver with 107dB efficiency and 18 Ohm Omega technology.



Two new 12″ XB12 drivers with 152mm voice coils and 1.15 Tesla flux density over 480mm voice coil length. Diaphragm composite of long fibre paper and carbon fibre.

Color worlds.

New elegant color and design options for an even more customized configuration of your dream speaker.

Coplanar driver alignment.

In the G3 Series, all drivers are on one axis. This means that the acoustic centers are all on the same plane. The distance of the acoustic centers of the drivers to the listener are therefore always identical. Accordingly, the signals from the respective sources (tweeter, midrange and woofer) arrive at the same time and thus correctly.

Modular technology.

All the electronics are housed in easily replaceable technology modules. So that you can easily expand or upgrade your system even after many years.

Current amplifier.

Patented iTRON current fully active engine for perfect control of membrane vibrations and the ultimate sound.

1000 Watt Bass Output stage

Integrated power amplifier with 1,000 watts of amplification power and processor-controlled active filters. New G3 user interface for programming.

You can choose from a range of finishes and colour options for the cabinet. If you prefer a minimalist look, our matt black or matt white lacquer finishes are ideal. For those who prefer a more natural look, we offer a selection of wood veneers.

One speaker. Two versions.


The semi-active version is designed to be used with external hi-fi amplifiers.
With an efficiency of 107dB/W/m and an impedance of 18 ohms, the speaker is extremely easy to operate and ideal for low-power amplifiers. The ideal speaker for the world’s finest high-end amplifiers.


In the iTRON version, the amplifiers are built into the speaker, eliminating the need for external power amplifiers. To achieve this, we have developed an electronic system that is based on a fundamentally different operating principle to any of the conventional amplifiers on the market. We are the first manufacturer in the world to achieve what was previously thought to be an impossible technological feat. For a sound that is simply heavenly.

Modular technology for versatility & timelessness.

Each model has a replaceable technology module that connects to the loudspeaker via a multi-pin power connector. This makes it easy to upgrade the semi-active speaker with iTRON technology at a later date.

It can be upgraded to the most advanced digital technology available at the time, even after many years.

This ensures the sustainability of your investment for generations to come.

Coplanar alignment of the drivers.

In the speaker, all the drivers are on the same axis. This means that the acoustic centres are all in the same plane. The distance between the acoustic centres of the drivers and the listener is therefore always identical.


200mm tweeter horn
  • Low cut-off frequency with substantially increased acoustic power
  • Redesigned smaller and lighter membrane
  • Linear phase response less than 50 degrees deviation (4,000 - 20,000 Hz)
  • 28,000 Hz cut-off frequency

The perfect crossover.

With our SphericLowCut filter, Airgate technology and PolarizationPlus circuit, we have developed the most innovative technological concepts in our passive crossover.

These are completed with the highest quality components available. Our new NatureCap is an extremely complex capacitor, handmade in Germany. The electrodes are made from precision-rolled aluminium foil, rather than ultra-thin plastic film vaporized with aluminium. The dielectric is a cellulose fibre compound impregnated with organic oils. The NatureCap is approximately 25 times larger than the previous XD series capacitors and is securely mounted to the circuit board using specially manufactured brackets.

XB12 bass driver


For the DUO GT we have developed a completely new drive. Compared to the previous model, we have increased the voice coil from 100mm to 153mm. With this gigantic 6 inch motor structure we achieve absolute top values for the power factor and the power handling, while reducing the power compression.

The motor structure consists of two High Grade magnets magnetised in Europe’s largest 200,000-volt facility. The huge voice coil transfers the power of the permanent magnet with 1.15 Tesla flux density to a voice coil circumference of 480mm. This is an increase of over 50% compared to the previous model!

We use low carbon steel for the pole plates, which are specially designed for the XB12. To ensure high linearity even at maximum diaphragm excursion, the spider has a patented dynamic profile with a progressive surround design. The surround is made of low-loss NBR (Acrylonitrile Butadiene Rubber) for fast and clean transient response.

The diaphragm is made from a composite of long-fibre paper and carbon fibre – extremely strong and torsion resistant for precise pistonic excursion of the diaphragm during transients and decay.

The XB12’s new SingleFrame chassis features robust die-cast aluminium cantilevers, which also enclose the magnet, providing a totally rigid material bond around the moving parts of the motor structure.

The XB12 is our reference in terms of bass. A statement that underlines the uncompromising and unique nature of the G3 Series.

Bass amplifier


The DUO GT’s active subwoofer is powered by the G3-1000 power module. This integrated power amplifier consists of a 1,000-watt amplifier that provides ample headroom for complex EQ settings.

The subwoofer can be switched on remotely via a 12-volt switching input. Direct connection to integrated amplifiers, power amplifiers or receivers is via speaker-level input terminals. Alternatively, line level inputs are available via XLR connectors. The signal tap is not only high impedance, but also balanced and transformer-coupled. This keeps the circuit ground floating, eliminating hum and making it easy to connect to balanced and bridged amplifier designs.

All electronics are fused via a state-of-the-art E-Fuse circuit. Not only is this much faster and safer than conventional fuses, but it is also ideal in terms of sound.

Digital crossover.


The bass power amplifier is equipped with an advanced digital sound processor.

The digital crossover eliminates all passive filter elements in the signal path with a precision and bit accuracy that cannot be achieved with analogue technology.

The volume of the subwoofer can be adjusted using the two buttons on the DSP display.

The Avantgarde Control Software allows a wide range of additional settings (e.g. high and low pass filters, equalisers, etc.) to be programmed. The DSP has 2 x LAN sockets, allowing multiple subwoofers to be daisy-chained for simultaneous programming. A USB connection is optionally available.

The user interface has been completely redesigned and is now very easy and intuitive to use. All parameters can be easily adjusted to suit the room acoustics or listening habits.

The BASS-BOOST control can be used to boost the low-frequency response below 45 Hz, allowing the bass response to be adjusted from ‘linear’ to ‘rich’.

The DSP has an 8-band equaliser for individual frequency adjustment. Each of the 8 bands can be raised or reduced by up to 4 dB. This can be used to adjust the bass response to suit a particular sound (linear, techno, pop, rock, classical, etc.) or to reduce certain broadband room resonances.

The LPF-RANGE slider adjusts the upper crossover frequency of the subwoofer and thus the “tonal balance” of the system.

At higher frequency settings, the subwoofer partially overlaps with the midrange horn’s frequency response. This makes vocals/instruments sound ‘warmer’ and ‘fuller’.

When the crossover frequency is set lower, there is a small gap between the subwoofer and midrange frequency response. The tonal balance of the system shifts towards a more ‘dynamic & punchy’ sound.

FILTER 1 & 2 are narrow band ‘notch’ filters with a level cut of -3dB or -6dB. These filters can be used to eliminate/reduce unwanted narrowband room resonance frequencies.


Frequency range satellite 170-28,000 Hz
Frequency range Subwoofer 18-350 Hz
Power handling 100 Watt
Sensitivity (1 Watt/1 m) > 107 dB
Crossover frequencies 170/3,500 Hz
Nominal impedance 18 Ohm
Recommended amplifier power > 10 Watt
Recommended room size > 20 sqm
Coplanar driver alignment yes
OmegaDrive yes
AirGate yes
NatureCap incl. PolarizationPlus circuitry yes


PDF Documents
DUO GT Brochure
DUO GT Manual
DUO GT (iTRON) - Roy Gregory (2023, English)
DUO GT (iTRON) - image Hifi (2023, German)
Test listening
Experience the incomparable Avantgarde sound.

To provide you with a suitable place for this encounter, we have created our showroom. All our loudspeakers are ready for demonstration and can be heard in direct comparison. Operated with classic voltage amplifiers or also gladly via our switching system in comparison with the unique iTRON electronics.

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