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Home Tech talk

Technology behind the Acoustical Systems A*Stellar turntable

Dietrich Brakemeier tells the story

Marco Lisi by Marco Lisi
February 7, 2024
Reading Time: 2 mins read
0

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The essence of 33 years turntable design and evolution in the Apolyt finds its cumulation in an all-new turntable concept. The task was to transfer the relevant and unique design features of the extremely large and heavy Apolyt into a considerably more compact and feasible format – without losing even the tiniest aspect of the all-alone sonic level provided. All the design features and inventions which defined the unique apogee level of the Apolyt’s sonic performance have now been incorporated in a much more compact and positively matured new design. The A*Stellar is literally the design result of “the road of excess leading to the palace of wisdom.” A turntable second to no other – in its concept and sonic performance on a par with the Apolyt and superior to all others.

technology-behind-the-acoustical-systems-astellar-turntable-4

Platter

  • A unique 36 (thirty-six !) layers design platter, incorporating 18 different materials with defined energy transfer speed – combined in the optimum sequence.
  • Incorporating Vinyl, Tungsten HD18, Titanium, AW6082 Alloy, 1.4401 Vanadium Steel – plus a defined mixture of organic material layers pressed together and bounded by natural resin.
  • Featuring the unique APOLYT-concept inner platter design – and going beyond
    that.
  • The A*Stellar’s platter is 100% non-resonant, with a truly unique design
    concept featuring an absolute non- reflecting inner surface.
  • Designed to provide the utmost possible pitch-black deep dark “sonic background” – to allow the most tiny details to appear in an unforced and natural way and thus to integrate swift into the all-harmonic sonic picture provided.
  • The platter spindle is fully decoupled and isolated from the bearing and featuring
    an inner thread to allow optimized coupling of vinyl record to material-identical platter surface by screw-on clamp as well as any record weight.

technology-behind-the-acoustical-systems-astellar-turntable-2

Bearing

  • A bi-radial, unique adjustable push-pull magnetic bearing, completely
    maintenance-free – proving a perfect isolated and totally vibration-free rotation.

Suspension & Plinth

  • Full air suspended plinth with 1.2 Hz resonance frequency.
  • True 3-point precision leveling with tilt-prevention.
  • Plinth featuring 3 levels made from 3 different Aluminium alloys – with inlays of Titanium and vibration-absorbing gel.
  • Tonearm mounting boards with “Zero-tolerance” – automatic perfect re-location design:each tonearm mounted and aligned on one position can be moved to any of the their 3 positions without any re-alignment/recalibration needed.
  • Arm boards with defined and maximized energy transfer.

technology-behind-the-acoustical-systems-astellar-turntable-3

Drive

  • Double-point brushless DC motor belt drive – with active dynamic control motor management – and free of any parasitic side force / drag applied to the platter.
  • Double flywheel drive – with maximized inertia incorporated in the active motor management.
  • Totally decoupled bearing level and tonearm mounting board level from motor level.
  • Speed 33, 45 and 78 – all full stabilized with below 0.01 derivation from set speed.

technology-behind-the-acoustical-systems-astellar-turntable-5

Visit the Acoustical Systems website.

Tags: Acoustical SystemsDietrich BrakemeierTurntablesVinyl
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Marco Lisi

Marco Lisi

I was playing vinyl when I was 3 years old. There was a song from the Rubettes that I liked a lot "Sugar Baby Love". My mother still cherishes the photo of me spinning that record! The audiophile was born. As an adult the video enthusiast in me woke up, making professional corporate movies. Here, at "Best of high end", I can indulge my audiovisual senses.

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