OVERVIEW
GREENWICH TURNTABLE.
tHE FOUNDATION OF THE WILSON BENESCH GMT® ANALOGUE ARCHITECTURE.
The Greenwich Turntable establishes the entry point into the GMT® platform, built around the ALPHA–OMEGA direct drive architecture shared with the Prime Meridian and GMT® One Turntables.
GREENWICH Turntable
A Unified Analogue Architecture
The Greenwich Turntable is designed as the foundation of the Wilson Benesch GMT® Collection analogue architecture. Built around the OMEGA Direct Drive motor platform and controlled by the ALPHA Drive electronics, Greenwich shares the same core drive foundation as the Prime Meridian and GMT® One turntables, while structural and isolation systems evolve through the range.
Greenwich integrates seamlessly with the GRAVITON® Ti tonearm and may be configured with the TESSELLATE Ti cartridge, R1 Carbon Rack, and VTA Control System to form a complete Greenwich System. In this way, owners can enter the platform at Greenwich and evolve progressively through the GMT® hierarchy while preserving the core ALPHA–OMEGA drive platform and associated system components.
ALPHA Drive
The ALPHA Drive provides the electronic control system for the OMEGA Direct Drive motor platform. Developed specifically for the GMT® turntable architecture, the ALPHA Drive generates quartz-referenced multi-phase sine wave signals that govern the synchronicity of the motor’s electromagnetic field.
By delivering precisely controlled current to each motor pole, ALPHA ensures exceptionally stable rotational behaviour and accurate speed control without the need for complex feedback correction.
All GMT turntables are supplied with the GMT Control App, operated via a dedicated tablet interface. The application allows users to select playback speeds (33, 45 and 78 RPM), start and stop the turntable and perform fine speed trim adjustments in 0.1 RPM increments.
When equipped with the VTA Control System, the ALPHA Drive also manages tonearm lift and lowering functions and enables ultra-precise vertical tracking angle adjustment through a piezo-controlled mechanism with nanometre-scale resolution. Users can store and recall multiple VTA positions directly within the control interface.
The VTA Control System is an optional upgrade for the Greenwich Turntable, while it is integrated as standard within the Prime Meridian and GMT® One turntables.
While the ALPHA Drive shares a common architecture across the GMT® platform, additional control modules are integrated in higher GMT models to support expanded system functions, including the pneumatic isolation control systems used in the GMT® One turntable.
OMEGA Drive
The OMEGA Direct Drive motor was developed specifically for the GMT® analogue platform through a collaborative research programme involving Wilson Benesch engineers and academic partners from Sheffield Hallam University. Supported by Innovate UK funding, the project brought together expertise in electro-magnetic engineering, dynamic electromagnetics, coil winding and precision manufacturing.
OMEGA employs a slot-less synchronous motor with a circumjacent radial force architecture, eliminating cogging and reducing torque ripple to extremely low levels. The design delivers smooth, stable platter rotation without the noise and vibration associated with conventional belt, idler or traditional direct-drive systems.
At 15 inches in diameter, OMEGA is the largest motor ever developed for a turntable. The large-scale architecture significantly improves motor efficiency and rotational stability compared with the small motors typically used in direct-drive designs.
The motor incorporates 21 precision-wound coils and 14 NdFeB magnets, arranged to create an exceptionally uniform magnetic field that governs rotor synchronicity without requiring complex speed compensation.
A magnetic counterforce system reduces the effective dynamic mass acting on the Angstrom bearing. This ensures Hertzian contact forces remain within safe limits while allowing efficient energy transfer from the motor to the platter and surrounding structure.
The result is a drive platform delivering exceptional rotational precision, extremely low torque ripple and silent operation. OMEGA forms the common foundation of the Greenwich, Prime Meridian and GMT® One turntables.
GMT Collection Platform Architecture
| Greenwich | Prime Meridian | GMT One | ||
| Architecture Element | ||||
| OMEGA Drive | ✅ | ✅ | ✅ | |
| ALPHA Drive | ✅ | ✅ | ✅ | |
| GMT Control APP + Control Device | ✅ | ✅ | ✅ | |
| Isolation Architecture | Tuned spring damping system | FrACTaL Damping technology in the turntable chassis with a Tuned spring damping system | LeVeL Pneumatic Isolation system with micro-processor controlled self levelling system | |
| Piezo VTA Control System | Upgrade Option | Included. Allows remote controlled VTA position setting, with pre-saved position recall with 1-nanometer resolution. Automatic tonearm lift on platter stop. | Included. Allows remote controlled VTA position setting, with pre-saved position recall with 1-nanometer resolution. Automatic tonearm lift on platter stop. | |
| STAGE One Signal Architecture | Integrated within Armhub. Connection type fixed at order. | Integrated within turntable chassis. Allows multiple connection boards to be changed on the fly to allow direct wired configuration, RCA output or XLR configuration | Integrated within turntable chassis. Allows multiple connection boards to be changed on the fly to allow direct wired configuration, RCA output or XLR configuration | |
| Arm Architecture | Configured for one Wilson Benesch armwand. STAGE One design enables quick interchange with one or multiple different WB armwands. | Configured for one Wilson Benesch armwand. STAGE One design enables quick interchange with one or multiple different WB armwands. | Configured for one Wilson Benesch armwand. STAGE One design enables quick interchange with one or multiple different WB armwands. | |
| R1 Carbon Rack | Optional | Compulsory | Compulsory | |
| Upgrade Path | Piezo VTA Control System, R1 Carbon Rack, upgrade to Prime Meridian chassis to add FrACTaL Damping. | Upgrade to GMT One by adding LeVeL chassis to include micro-processor controlled, self levelling pneumatic isolation system. | Full reference architecture | |
SPECIFICATIONS
| OMEGA Drive | Description | Synchronous 15” diameter, 21 coreless-slotless, 3 phase zero-cogging, zero torque ripple, patent applied for direct drive motor. The time-average torque is 0.718 N.m @ 1.2A RMS & rated speed of 33.3 rpm. The RMS value of the torque ripple is 0.001342 (N.m). The torque ripple includes all the components (like cogging torque and the current commutation and air-gap flux harmonics). | ||
| ALPHA Drive | Description | Computer controlled quartz referenced high precision sine waves. 3 super linear class A amplifiers. Computer controlled remote control systems. | ||
| Upgrade Option | The ALPHA Drive supplied with the Prime Meridian System can be upgraded to add a computer controlled pneumatic self-levelling control system for the LeVeL isolation system in the GMT® One System. Supplied as standard in the GMT® One System. | |||
| Speed Range | 33.3, 45, and 78pm | |||
| Control | fully adjustable via dedicated Smart Device WB Control APP in 0.01 increments. | |||
| Wow and Flutter | not measurable | |||
| GRAVITON® Ti Armwand | Description | Kinematic bearing provides 3-point location ensuring zero Brinelling and the optimal hertzian forces to ensure energy transfer through two different materials. Bearing is designed to allow easy change of Graviton® Armwand in less than a minute. Shortest possible lead out wire to avoid signal corruption. | ||
| Internal Wiring | Silver / Teflon wire | |||
| Effective Length | 304.8mm | |||
| Mounting distance | 291.6mm | |||
| Offset Angle | 18° | |||
| Overhang | 13.2mm | |||
| Effective Tonearm Mass | 14g | |||
| Cartridge Weight Range | All possible | |||
| STAGE One | Description | Stage One: Close proximity over arm tonearm wire input. Wired with a binder connector | ||
| R1 Rack | Description | Optional Upgrade: Provides optimal location of all Alpha Drive & Omega Drive systems. | ||
| WB GMT Control APP | Description | Provide GUI for complete remote control over all critical aspects of system including VTA (accurate to 1nM) start / stop, speed and lift lower. | ||
| Router & LAN | Router provided with the unit, preconfigured with wifi connection to the Smart Device preinstalled with the WB Control APP. Does not connect to the internet. | |||
| Finish Options | The Greenwich Turntable can be specified with Polished Silver or Polished Gold accents on the four caps on the glass top of the turntable and the platter weights around the periphery of the platter. Customers ordering an R1 can also choose to match the finish used on the metal components used to finish the R1 Rack. These accents can match the finish chosen on a the GRAVITON® Ti Armwand or TESSELLATE Ti Cartridge. |
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| Turntable Weight (OMEGA Drive, armhub, STAGE One, arm park and glass top only | 64Kg // 141lbs | |||
| ALPHA Drive Weight | 30Kg // 66lbs | |||
KEY SPECIFICATIONS
TACTIC 3.0 DRIVE UNIT
ISOBARIC DRIVE SYSTEM
FIBONNACI TWEETER
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