ENIGMA mkII

AMERICAN WALNUT
High gloss
AMERICAN WALNUT
High gloss
AMERICAN WALNUT
High gloss
AMERICAN WALNUT
High gloss
WHITE CREAM (RAL 9010)
High gloss
WHITE CREAM (RAL 9010)
High gloss
WHITE CREAM (RAL 9010)
High gloss
WHITE CREAM (RAL 9010)
High gloss
ROSEWOOD
High gloss
PIANO BLACK
High gloss
PIANO BLACK
High gloss

ENIGMA mkII is Apertura new 2 ways flagship model.

This new version, called mkII, is based on the same configuration as the original ENIGMA, with two 22cm woofers and a very big ribbon tweeter. All the other elements and the crossover have been redesigned in order to achieve the best performance ever.

The load has been optimized with a special care on mechanical and electromagnetic damping of every drivers.

INTRODUCTION SPECIFICATIONS MANUALS & APERTURA GUIDES REVIEWS AWARDS

DRIVE UNITS

Two 22cm mid woofers, with « isotactic Matrix » cones – a new type of composite material (woven polypropylene). This cone material exhibits stiffness, lightness and good damping properties,
Long voice-coil on titanium former for a high linear excursion. A heavy copper ring on the pole piece together with a solid copper phase plug reduce distortions.
This custom design driver made by Seas in Norway for Apertura is widely modified in our facility (motor & mechanical damping).
New generation ribbon tweeter that uses an aluminum/ polymer sandwich diaphragm for improved linearity.
The high frequency drive unit is a professional grade ribbon tweeter, one of the biggest currently available. Its emissive surface is four times the Armonia one.
A so high effective piston area allows to reduce the movements of the ribbon, thus distortion at low and high levels.

CROSSOVER

Proprietary « DRIM » structure with a triple attenuation slopes and phase control over the entire bandwidth.
A brand new crossover for this mkII version with two independent circuit boards for low-pass and High-pass sections.
Choix de condensateurs très haut de gamme.
Selection of very high end audio capacitors from Jantzen, Denmark.
Each set of drive units (tweeter and mid/woofer) are individually measured and crossover values adjusted according to these sets measurements.
Hand wiring on a 140 µm copper printed circuit board. Optimized crossover structure to avoid magnetic interference between components
Binding post : pure copper with gold plating

ENCLOSURE

This new model uses the Apertura very specific cabinet shape: two curved sides of different length and no parallel front and back panels.
The complex load is a mix between a Bass-Reflex and an acoustic line. The vent tube of large section is located beneath the speaker.
A massive metal base acts as a mechanical referential and helps reproduce with precision the most subtle details.
Laminar structure based on multiple thin layers pressure molded.
Such process creates breaking modes and limit propagation of vibrations.
Final thicknesses vary from 28 to 44 mm.
Internal multi-cavity framework to stiffen the structure and create very specific areas where damping materials can be applied
No less than 10 horizontal and vertical thick bracing panels make up the skeleton on which all panels are mounted on
Importance is given to damping treatment to cancel any standing waves. We are using 4 different types of dumping materials.
Mechanical grounding: a central cone positioned on the axis of the center of gravity improved vibrations transfer to the floor. It optimized the dispersal of structure-borne noises.
One standard finish available :
- High Gloss : american walnut, rosewood, piano black, white cream (RAL 9010)

Frequency range : 30-30 000Hz / +-3dB
Sensitivity : 95 dB/2.83v/1m
Impedance : 4 Ω
Load : Bass-reflex
Drive units : 2 x 22 cm mid-woofer « Isotactic matrix », Ribbon tweeter 15 x 145 mm
Crossover frequency : 2,1 kHz
Terminals : single wire binding posts (bananas or spades)
Dimensions : 254 x 406 x 1270 mm (W x D x H), with metal stands : 404 x 443 x 1346 mm
Weight : 76 kg net – 95 kg (packed)

Manual (bilingual EN/FR)

Apertura Guide (English)

May 2024
IMAGE HIFI
IMAGE HIFI
Full original review in German
October 2021
The Absolute Sound (US)
The Absolute Sound (US) – October 2021

See article
June 2021
Fidelity
FIDELITY – 58
Full original review in German

Original review summary in English

Magazine Fidelity – February 2022

Magazine The Absolute Sound (US) – 2022

ENIGMA mkII

AMERICAN WALNUT

AMERICAN WALNUT

AMERICAN WALNUT

AMERICAN WALNUT

WHITE CREAM (RAL 9010)

WHITE CREAM (RAL 9010)

WHITE CREAM (RAL 9010)

WHITE CREAM (RAL 9010)

ROSEWOOD

PIANO BLACK

PIANO BLACK

American Walnut

Rosewood

White cream (RAL 9010)

PIANO BLACK

DRIVE UNITS

CROSSOVER

ENCLOSURE

May 2024

IMAGE HIFI

October 2021

The Absolute Sound (US)

June 2021

Fidelity

40 years of passion for music