Clearaudio Reference Jubilee Drivverk

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REFERENCE JUBILEE
New Clearaudio Reference Jubilee Turntable: where the best of the past, present and future meet for a new era of analogue precision

The new Reference Jubilee turntable marries the best of ‘Clearaudio past, present and future’ to usher in a new era of analogue precision. It delivers lifelong synchronized rotational speed, astonishingly low levels of both resonance and friction, and a breathtaking moment of torque.

Its 6cm-thick main platter is constructed from highly damped polyoxymethylene (POM) and, as you might expect with any Clearaudio turntable, the platter rotates on a special variation of the brand’s own patented ceramic magnetic bearing (CMB). The motor housing is elaborately decoupled from the chassis by an elaborate network of rubber ‘tightropes’.

While Clearaudio has earned a considerable reputation for innovation in all things analogue, here the design team has expertly married digital and analogue technology to achieve a new level of precision and consistency of rotational speed. A 12-bit DAC generates the drive motor’s voltage; the DAC has exceptionally high resolution and zero fluctuations or ‘drift’ in response to either time or temperature. What’s more, it has been cleverly designed to work in tandem with Clearaudio’s optical speed control system. Every three seconds, an optical sensor takes a reading of the 8.5kg stainless steel sub-platter’s rotational speed, and delivers that reading to a control unit; the control unit then immediately regulates the slightest deviations by adjusting the motor’s voltage via an operational amplifier.

The Reference Jubilee’s brand new air-core (non-magnetic) 24-volt DC motor, which runs unbelievably quietly, ensures that the listener remains blissfully unaware of the whole process.

CONSTRUCION DETAILS:

* Resonance–optimised chassis shape, made of laminated wood and aluminium with precision CNC machined surface.
* Resonance-optimised chassis shape
* Made of laminated wood and aluminium with precision CNC machined surface
* All turntable feet are fine adjustable
* Optical Speed Control (OSC)
* Playback of one tonearm possible
* IMS – Innovative motor suspension
* (Suspension design of the motor using 18 O-rings)

Specifikation:

* SPEED OPTIONS: Comfortable speed change,
33 ⅓ rpm, 45 rpm, 78 rpm
* DRIVE UNIT:
High torque 24V DC motor with belt drive
Fully automatic self-calibration of the speed by a push of a button
Hybrid engine control:
A high resolution 12 bit digital-to-analog converter (DAC) generates a motor reference voltage, which is fed into the purely analog motor control.
Automatic compensation of friction and temperature changes on the platter bearings and belts.
The speed remains in the perfect range at all times.
* BEARING: Clearaudio CMB ceramic magnetic bearing in main platter / upper drive platter assembly.
Inverted bearing in lower drive platter.
* PLATTER: 50mm / 1.97 inch main platter, made out of synthetic material with high density and excellent dimension.
15mm / 0.59 inch stability, precision CNC machined surface, solid stainless steel sub-platter, dynamically balance.
* SPEED ACCURACY (MEASURED): < ± 0.05 %
* POWER CONSUMPTION: Max. consumption: 5.0 watts
Consumption in operation: 2.1 watts
Off mode: 1.8 Watt
* TOTAL WEIGHT: Approx. 22 kg (without tonearm and power supply)
* DIMENSIONS (W/D/H in mm): Approx. 495 x 343 x 160 (with tonearmbase, without tonearm)

Läs mer på: www.clearaudio.de