Apertura – KALIBRATOR Evo

DRIVE UNITS

• Two-way, two-driver speaker
• A 22cm mid/woofer, the same as in Edena Evolution. This driver size remains very rare in this type of speaker, but it is one of the key elements of this model’s performance
• “Isotactic Matrix” cone technology and a powerful Excel magnetic circuit
• This custom design driver made by Seas in Norway for Apertura is modified in our facility with the addition of a copper ring and a machined brass phase plug
• AMT « Air Motion Transformer » tweeter. Although this technology is not new, it has made tremendous progress in recent years and now rivals our favorite ribbon driver technology.
• AMT tweeter from Mundorf – mounted on a massive machined front plate with a short horn loading
• The tweeter is offset, and diffraction is damped using a piece of wool felt

CROSSOVER

• Proprietary « DRIM » structure with a triple attenuation slopes and phase control over the entire bandwidth.
• High end components from Jantzen :
  • Heavy gauge baked inductors
  • Highend Polypropylene capacitors
• Hand wired on a 140 µm copper thickness printed circuit board.
• Optimized crossover structure to avoid magnetic interference between components
• Each set of drive units (tweeter and mid/woofers) are individually measured and crossover values adjusted according to these sets’ measurements.a
• Internal thick copper cable wiring
• Binding post: Pure copper, silver -plated – spades or bananas

ENCLOSURE

• Same high level of mechanical construction as for our other models
• The vent tube of the bass-reflex loading has an optimized location as close as possible to the bass driver
• Panel thickness : 25mm minimum
• Two thick bracing panel to stiffen and create very specific areas where damping material can be applied
• Complex internal damping treatment to cancel any standing waves.
• 3 different type of damping material is used
• 3 standard finishes available :High Gloss : American Walnut – Figured Maple – Black

STAND

• Machined aluminium stand with two very thick vertical elements
• Dedicated stand to Kalibrator Evo
• Weigh t: 17kg
• Mechanical grounding : a central cone positioned on the axis of the center of gravity improves vibrations transfer to the floor.
• The four peripheral spikes serve only for stability

Its 2-way / 2-driver configuration with decent sensitivity, and a nominal 8 ohms impedance allow the Kalibrator Evo to be paired with a wide range of high-quality electronics