EXTREME

The Ultimate
Loudspeaker
Experience

Emotionally immersive sound, groundbreaking engineering, and sculptural design in a fully adjustable high-end loudspeaker.

Contact your local dealer

The Ultimate
Loudspeaker
Experience

Emotionally immersive sound, groundbreaking engineering, and sculptural design in a fully adjustable high-end loudspeaker.

Contact your local dealer

What Makes It Special

Through advanced engineering and meticulous craftsmanship, the Estelon Extreme Mk II blends art and science to deliver a life-like listening experience that adapts to any acoustic space.

  • Height-Adjustable Architecture: 
Upper module moves 300 mm for ideal soundstage alignment.
  • Diamond Tweeter & Accuton Drivers: 
World-class CELL technology drivers with extreme precision.
  • Symmetric Driver Loading (SDL): 
Controlled, phase-accurate, room-filling bass.
  • Room-Aware Design: 
Engineered for seamless integration 
with complex acoustic spaces.
  • Sculptural Cabinet: 
Non-box, curved shape eliminates 
resonance and internal reflections.
  • Remote-Controlled Adjustments: 
User-tuned sound optimization with effortless control.

Refined by Nature and Engineering

  • Crafted from a proprietary marble-based composite — 
dense, resonance-free, and acoustically ideal.
  • Curved, seamless cabinet with no parallel 
walls for pure sound reproduction.
  • Weighing 250 kg, each unit delivers stability 
for both subtle micro-details and dynamic bursts.
  • Available in gloss, matte, and fully customized finishes.
  • Hand-polished over several weeks using a 12-layer paint process.
Acoustic Performance –<br />
Core Technologies

Acoustic Performance –
Core Technologies

Room Integration &
Soundstage Optimization

  • Woofers positioned near the floor to enhance 
low-frequency response and reduce standing waves.
  • Midrange and tweeter drivers are elevated 
for improved imaging and spatial clarity.
  • Drivers mounted on a curved front panel 
to preserve time alignment and dispersion accuracy.

Cabinet Design &
Internal Chambers

  • Separate internal enclosures for each 
driver eliminate interference.
  • Advanced dampening materials and chamber 
shapes prevent resonances and unwanted coloration.

Tweeter Adjustment &
Precision

  • Motorized camshaft system allows 5-step 
depth tuning of the diamond tweeter.
  • Curved baffle and suede-covered foam 
ring reduce cabinet diffraction and enhance imaging.

Bass Reflex & SDL
Technology

  • Rear bass reflex tunnel with internal 
dampening minimizes turbulence.
  • Dual 11″ woofers operate symmetrically 
for clean, distortion-free bass output.

Upper Module
Height Adjustment

  • Remote-controlled upper module moves up to 300 mm for precise room adaptation.
  • Linear actuator ensures exact, repeatable positioning with built-in safety.

Each speaker features a
carefully matched driver
array by Accuton.

  • 2 × 250 mm (11″) CELL aluminium sandwich woofers (custom design by Accuton)
  • 1 × 250 mm (11″) CELL aluminium sandwich mid-woofer (custom design by Accuton)
  • 1 × 168 mm (7″) CELL ceramic membrane midrange (Accuton)
  • 1 × 25 mm (1″) CELL diamond tweeter (Accuton)

These drivers work together to deliver coherent sound staging, realistic dynamics, and effortless musical flow.

Crossovers & Signal Purity

Side view depicting the curved front panel of Estelon Extreme Mk II

At the heart of the Extreme Mk II’s seamless performance lies a crossover network crafted with the utmost precision. Each filter is meticulously designed to integrate the drivers in both time and frequency domains, preserving the speaker’s tonal integrity and dynamic agility.

To achieve this, we use only the highest-grade components: SESGO capacitors, precision thick-foil and Supreme resistors, Mundorf inductors, and Goertz flat foil coils, among others. Each part is carefully selected and paired through rigorous measurement and listening, ensuring minimal loss and maximum synergy.

Our crossover circuits are housed in isolated chambers within the cabinet, protecting them from vibrations and microphonic effects. We also employ a proprietary flat foil direct coupling technique. This innovative design routes the signal through a central conductor — a star-grounded layout optimised to preserve signal integrity from crossover to driver terminals.

Each component is hand-soldered using premium solder, with the shortest possible cable runs throughout. This obsessive attention to detail allows the Extreme Mk II to deliver unparalleled resolution, timing, and control — ensuring that what reaches your ears is as pure as the original performance.

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Side view depicting the curved front panel of Estelon Extreme Mk II

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Customization & Finishing

  • Choose from a wide range of High-Gloss finishes
  • Fully bespoke finishes available on request
  • Every unit is hand-finished over
    several weeks by expert artisans
Midnight Opera
Bronze Royale
Lunar Eclipse
Nordic Emerald

Technical
specifications

TYPE
4-way passive loudspeaker, bass reflex
DRIVERS
2 × 250 mm (11″) CELL aluminium sandwich woofers (custom design by Accuton)
1 × 250 mm (11″) CELL aluminium sandwich mid-woofer (custom design by Accuton)
1 × 168 mm (7″) CELL ceramic membrane midrange (Accuton)
1 × 25 mm (1″) CELL diamond tweeter (Accuton)
INTERNAL WIRING
Kubala-Sosna
FREQUENCY RESPONSE
23 Hz – 60,000 Hz (linear up to 33,000 Hz)
POWER RATING
500 W
NOMINAL IMPEDANCE
3 Ω (minimum 2.0 Ω at 95 Hz)
SENSITIVITY
91 dB / 2.83 V
MINIMAL AMPLIFIER POWER
20 W
CABINET MATERIAL
Marble-based composite
DIMENSIONS
Height: 1770 – 2070 mm (adjustable)
Width: 690 mm
Depth: 820 mm
Net weight: 250 kg per loudspeaker
RECOMMENDED ROOM SIZE
50 – 200 m²

2023
Editors’
Choice
Award

Nghenhin,
Vietnam

2023
Best of
AXPONA

Enjoythemusic.com,
USA

2022
Best
Sound

High Fidelity,
Poland

Best Sound
of Show
2018

Taipei International
Audio Show,
Taiwan

“The sound that I heard suggests that these speakers are among the best”

Jim Hannon,
The Absolute Sound

Read the review
Developed by Reaktiiv