DALI Opticon Vocal MK2

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DALI OPTICON VOKAL MK2

The landscape-format OPTICON VOKAL MK2 is the center speaker of this series and is primarily responsible for reproducing dialogue in multi-channel setups. Thanks to its precisely tuned 2 1/2-way system with the high-resolution hybrid tweeter and a 165 mm mid-woofer, excellent speech intelligibility is guaranteed.


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DESCRIPTION

The OPTICON VOKAL MK2 was consistently developed as a center speaker for home cinema. The chassis configuration with a 165 mm (6 1/2″) bass-midrange driver and the DALI hybrid tweeter guarantees not only a well intelligible voice reproduction, but also a harmonious integration of the center channel into the sound image of the entire system. The Gehäuseand proportions of the OPTICON VOKAL MK2 are designed for possible integration of the landscape-format Speakerin A/V furniture – thanks to the front-facing bass reflex ports, it is even possible to place the Speakerin shelves or lowboards closed at the rear.

The OPTICON VOKAL MK2 is available in the variations white matt, ash black and tobacco oak.

SMC MAGNET SYSTEM

DALI SMC (Soft Magnetic Compound) is a coated magnetic granulate that can be shaped into almost any desired form and offers numerous advantages when used in Speaker. SMC is characterized by a very unusual combination of very high magnetic permeability and very low electrical conductivity. These are exactly the desired features for the magnets of our Speaker. They reduce electroacoustic distortion to a considerable degree.

The use of SMC reduces eddy currents in the pole piece of the magnet system, which are caused by the movement of the voice coil around the pole piece. They generate a secondary magnetic field that modulates the input signal and results in increased harmonic distortion. In addition, SMC also improves flux linearity within the magnet system, reduces magnetic hysteresis and minimizes inductance variations of the voice coil depending on its position. All in all, the advantages of SMC mentioned above lead to a significant reduction of colorations and overlays, especially at low listening levels.

HYBRID TWEETER

FABRIC CALOTTE
The 29 mm fabric dome is a new development based on the tweeter of the CALLISTO series. The slightly larger diameter results in a significant increase in the sound-emitting diaphragm area, which is accompanied by lower distortion, higher power handling and a downwardly extended frequency range. The use of an identical tweeter dome in all six OPTICON MK2 models not only results in a consistent sound character – it also enables a crossover topology that is similar across all models, resulting in a uniform dispersion pattern.

The new OPTICON MK2 fabric dome allows the crossover frequency to be lowered to 2 kHz without fear of distortion or limitations in power handling. An extremely thin magnetic fluid provides high resonance damping and higher power handling without compromising the impulse response speed of the particularly lightweight, coated diaphragm.

HYBRID TWEETER
The redesigned hybrid tweeter of the OPTICON MK2 series combines a 29 mm fabric dome adapted from the CALLISTO speaker with a newly developed 17 × 45 mm ribbon. Both tweeters are mounted on a cast aluminum plate, which also ensures optimal horizontal dispersion.

The hybrid tweeter is tuned so that the ribbon radiates all frequencies above 14 kHz – below that the fabric dome intervenes in the musical action. The ribbon extends the frequency response of the overall system up to 30 kHz and at the same time improves the horizontal dispersion at the highest frequencies in a way that would otherwise not be possible. The new hybrid tweeter combines the best of both worlds: the clarity, speed and dynamics of a dome tweeter and the detail and finesse of a ribbon tweeter.

MID-WOOFER

The OPTICON VOKAL MK2 uses a 165 mm (6 1/2″) mid-bass driver that features DALI’s patented SMC magnet system and the reddish shimmering wood fiber cone. This consists of a mixture of paper and wood fibers, which ensures minimal breakage resonances and gives the membranes their unmistakable DALI trademark color. A particularly flexible rubber surround allows free diaphragm movement with minimal low-frequency damping.

The extremely rigid and low-resonance basket of the driver is made of die-cast aluminum. It is designed in such a way that, on the one hand, it does not obstruct the airflow inside the cabinet in any way and, at the same time, it ensures an extremely firm mechanical connection with the Speakerclosure.

The magnetic system of the OPTICON VOKAL MK2 consists of a large ferrite ring magnet surrounding a pole piece made entirely of the unique DALI SMC material. The pole piece and ferrite magnet are fixed between the soft iron front and back plates to create the appropriate magnetic field for the voice coil.

HOUSING

Each OPTICON MK2 cabinet has been optimized for maximum stiffness and minimum surface resonance. The 25 mm thick baffle of the OPTICON VOKAL MK2 provides optimal, unshakable working conditions for the drivers mounted inside.

The Speaker of the OPTICON MK2 series are manufactured at DALI in Denmark. Our in-house woodworking facility covers all aspects of manufacturing; from cutting and routing of MDF case parts to surface finishing and assembly. The installation of the drivers and crossovers, as well as the final quality testing and approval for each individual Speaker, are also carried out on our own production lines.

The center speaker’s reflex ports are not made with dual-flare tubes, but they are no less carefully thought out. The OPTICON VOKAL MK2 has two front-facing slot-shaped reflex ports so that the center speaker can also be easily placed on a shelf directly against the wall or in a closed shelf compartment.

Product Highlights
  • 3 way center Speaker
  • Frequency range (+/- 3 dB): 47 – 30,000 Hz
  • Sensitivity (2.83V/1m): 88 dB
  • Nominal impedance: 4 O
  • Maximum sound pressure level: 109 dB
  • Recommended amplifier power: 30 – 150 W
  • Product type : Center speaker
  • Type : 3 way center speaker
  • Rated power center (W) : 30
  • Center speaker width (cm) : 43.5
  • Center speaker height (cm) : 20.1
  • Center speaker depth (cm) : 31.2
  • Weight center speaker (kg) : 9.2
  • Speaker Center : Bookshelf Speaker Center
  • Efficiency/sound pressure 2.83V/1m (dB) : 88
  • Efficiency/sound pressure (dB) : 109
  • Rated power handling (W) : 30
  • Music power handling (W) : 150
  • Impedance (Ohm) : 4
  • Frequency response lower limit (Hz) : 47
  • Frequency response upper limit (Hz) : 30000
  • Crossover frequency high-super-high (Hz) : 14000
  • Crossover frequency mid-high (Hz) : 2400
  • Type center : Bass reflex type center
  • Speaker Center : 3-Way Speaker System Center
  • Number of super tweeters : 1
  • Number of tweeters : 1
  • Number midrange : 1
  • diameter tweeter (cm) : 2.9
  • diameter midrange (cm) : 16.5
  • Width (cm) : 43.5
  • Height (cm) : 20.1
  • Depth (cm) : 31.2
  • weight (kg) : 9.2
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