The Estelon Forza Ultra is where sculptural elegance, meticulous engineering and the emotional power of music become one. Building on the legacy of the original Forza, this second generation introduces new technologies to reveal music with extraordinary purity, scale and intimacy.
A Work of Art
Forza Ultra is a piece of sculptural art — distinctive in presence, yet designed to live naturally within its surroundings.
Advanced Engineering Within
Proprietary materials, next-generation technologies and unique engineering solutions come together in every detail.
Only the Performance
Extraordinary purity, precision and lifelike presence allow the loudspeaker to disappear, leaving only the performance.
The Luxury of Listening
Beyond technology and performance lies something increasingly precious — time to slow down, reconnect and simply enjoy music.
Design Philosophy
At Estelon, every millimetre of the design matters. From the precise position of each driver to every curve of the cabinet, the Forza Ultra is carefully shaped to interact naturally with the listening environment. The surrounding space becomes an integral part of the loudspeaker system.
At low frequencies, particularly below 100 Hz, sound behaves predominantly as pressure within a typical listening room rather than as easily localised waves. The Forza Ultra’s woofers are therefore positioned close to the floor, allowing them to couple acoustically with the surface. This improves efficiency and helps distribute room standing waves more evenly, supporting accurate and consistent bass reproduction across a wider listening area.
The two woofers are arranged according to Estelon’s Symmetric Driver Loading (SDL) principle. Their symmetrical positioning ensures that both drivers experience the same acoustic load and move in unison, contributing to bass reproduction with exceptional precision, authority and control.
Drawing of the Forza Ultra radiating sound waves outwards across the floor
Above 100 Hz, shorter wavelengths become increasingly sensitive to reflections, diffraction and driver placement. The upper drivers are therefore positioned higher in the cabinet and arranged in a carefully controlled vertical geometry to minimise unwanted reflections and maintain a stable stereo image.
The sculpted cabinet plays an equally important role. Its curved exterior surfaces avoid sharp edges around the drivers, reducing diffraction and helping sound disperse evenly into the room. Around the tweeter, the cabinet narrows with a carefully calculated curvature to further control high-frequency dispersion and maintain precise imaging across different listening positions.
Drawing of low-frequency wavefronts radiating from a driver and the resulting pressure pattern. The three upper drivers are mounted on an intentionally curved front panel so that, from the listening position, they are approximately the same distance from the listener. Combined with the precisely tuned crossover network, this allows their sound to reach the listener with a high degree of time coherency, supporting natural tonal balance, precise imaging, uncompressed dynamics and a lifelike soundstage.
Internally, the same philosophy continues. The marble-based composite cabinet, curved internal surfaces, lack of parallel walls and dedicated driver chambers are designed to suppress standing waves and structural resonances. The objective is simple: minimise the loudspeaker’s own contribution so that what remains is the recorded performance itself.
Driver Technology
At the heart of the Forza Ultra is an advanced four-way driver system created to reproduce the full musical spectrum with exceptional speed, purity and dynamic freedom. The custom aluminium dome woofers, Crystalid midwoofer and Crystalid midrange drivers were co-developed with Accuton, with each driver engineered specifically for its role within the Forza Ultra. The system is completed by Accuton’s newest-generation diamond tweeter, bringing exceptional resolution and extension to the highest frequencies.
Cabinet Technology
The Forza Ultra cabinet is created from Estelon’s proprietary marble-based composite — a highly rigid, dense material developed specifically for the complex forms that define our loudspeakers. Its sculptural form is not only an expression of design, but an integral part of the Forza Ultra’s acoustic performance. Together with its carefully engineered internal structure, it provides a stable and acoustically controlled foundation for the drivers to perform at their best.
TYPE
Four way passive loudspeaker, sealed enclosure
FREQUENCY RESPONSE
27 Hz to 60,000 Hz
LINEAR FREQUENCY RESPONSE
Up to 33,000 Hz
POWER RATING
400 W
NOMINAL IMPEDANCE
3 Ω
MINIMUM IMPEDANCE
2.3 Ω at 51 Hz
SENSITIVITY
89 dB at 2.83 V
MINIMUM AMPLIFIER POWER
20 W
INTERNAL CABLING
Kubala Sosna
CABINET MATERIAL
Proprietary marble based composite
WOOFER
2 × 250 mm, 11 inch, custom aluminium dome by Accuton
MIDWOOFER
190 mm, 8 inch, custom Crystalid dome by Accuton
MIDRANGE
90 mm, 5 inch, custom Crystalid dome by Accuton
TWEETER
25 mm, 1 inch, next generation diamond by Accuton
CROSSOVER FREQUENCIES
90 Hz, 800 Hz, 2.5 kHz
ISOLATION SYSTEM
Stillpoints Ultra SS V2
HEIGHT
1,675 mm, 66 inches
WIDTH
617 mm, 24 inches
DEPTH
682 mm, 27 inches
WEIGHT
150 kg, 330 lb per loudspeaker
RECOMMENDED ROOM SIZE
40 to 125 m², 430 to 1,345 ft²
Forza Ultra MSRP: from €159,000 / US$227,000 per pair.
