Mr Spock
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The Mk2 features an internal "mechanical crossover" system that addresses frequencies above 100Hz by providing a smooth mechanical pathway for higher frequency vibrations to travel away from critical areas and dissipate. The motor, platter bearing, and armboard are on separate, interlocking plates (think of leaves on a tree, or think of the bearing as the sun, with the motor and armboards as "planets"), precisely mounted within the turntable in carefully optimized locations away from the center to further isolate the stylus/record interface from unwanted, internally produced vibrations
The motor is an all-new, custom-designed, Swiss-manufactured, high-torque design, controlled by a custom, software-based, closed-loop servo control system located in the PowerBase, which monitors and calibrates speed more than 130,000 times per second. The original Helix One's motor occasionally developed reliability and noise issues. Mr. Döhmann ended up traveling to customers' homes to replace them
Not surprisingly, the Döhmann Helix One Mk2's sound was more similar to the Continuum Caliburn's than it was to the TechDAS Air Force One Premium's; the TechDAS sounded smoother and, you might say, more elegant, refined, and relaxed—probably something to do with the air-bearing platter, though of course that's just speculation.
That's not to say that the Air Force One was overly smooth, or that it softened transients—or that the Helix One Mk2 2 or the Continuum produce harsh transients or overly etched edge definition, or that the latter two were anything but top-to-bottom well-refined, suave, and unflappable sounding. I love how much some people hate far-flung metaphors, so here's one: The Air Force One Premium's sound is an immersion blender soup. The Caliburn's and Helix One Mk2's is more food-processor finely chopped. One is smoother and more velvety while the other is more chunky and textured. Both taste great
As with the Caliburn concept, Döhmann's newer design attempts to isolate the outside world while draining away internal vibrations that can interfere at the stylus/vinyl interface. Consequently, it gets those vibration measurements right.
The Mk2 iteration of the Döhmann Helix One turntable produced only one surprise: slightly worse speed measurements; otherwise, the new PowerBase is a useful ergonomic upgrade, while the carbon fiber top looks better. The armboard is improved. User-friendly pushbutton speed control is a big plus, as is the easier setup produced by whatever was done to eliminate the original 'table's need for brass balancing weights.
Döhmann Helix One Mk.2 turntable
Designing and building a turntable isn't all that difficult. All that matters is in plain sight: Start with a base of wood, MDF, or acrylic; add some isolation "feet" for it to rest upon, and a spindle bearing such as any competent machine shop can fabricate, topped by a platter of acrylic or...
Features
- State-of-the-art custom designed Swiss-manufactured motor
- PowerBase with new power supply
- Micro Signal Architecture© (MSA)
- Negative Stiffness Mechanism Vibration Isolation (NSM)
- Mechanical Crossover Technology (MCT)
- Tri-Modal Platter system (TMP)
- Edge Damping Ring (EDR)
- Tone arm Damping System (TDS)
- Resonance Tuned Suspension (RTS)
- Diamond Like Coating Amorphous Material Bearing Friction Modifier (DLC)
- High Torque Adjustable Drive (HTAD)
- High frequency and RF absorption features
- A suspension stabiliser for ease of operation during record changeover
- Lighting control system and power filtration functions
- Facilities for two tonearms
- 0.5 Hz (Fz) Vertical
- 1.5 Hz (Fz) Horizontal
- Push button Speed Adjust
Top Plate
All Helix One Mk2 turntables come with a carbon fibre top plate as standard.
Finish
Helix One Mk2 turntables are available with the following metallic finishes:
- Black
- Titanium
The Helix One Mk2 turntable is capable of mounting two tonearms up to 12” (305mm) simultaneously.
Armboards
All Helix One Mk2 turntables come with one Advanced Composite Armboard with a carbon fibre top for the main tonearm on the right hand side and one standard solid aluminium armboard for the second tonearm facility on the left hand side. The armboards are removable and allow simple interchange and calibration.
Simple Operation
The Helix One Mk2 is operated by two push buttons on the table surface for speed selection/on/off.
Speed Control
Speed is constantly calibrated over 130,000 times per second to deliver precise 33.33 or 45.15 rpm (factory default). Default factory set speeds are:
- 33 RPM
- 45 RPM
- 78 and other RPM’s are available by request
- Simple user-adjustable speed control is accessible via two intuitive push buttons on rear of chassis.
- Fully integrated Swiss-manufactured high torque motor
- Dual belt platter drive designed to reduce static electricity and vibrations.
- 110-120 VAC, 50/60Hz 2A
- 220/240 VAC, 50/60 Hz 1A
- The Helix One was launched at the Munich High End show in May 2015 and has been manufactured till January 2019.
- The Helix One Mk2 is the current version and has been manufactured from February 2019 onwards. It incorporates a new Swiss-manufactured motor made to Dohmann Audio’s specifications, new speed adjust functionality, some upgraded resonance mitigation technology, LED lighting and a new PowerBase incorporating a new power supply, new electronics and new HF/RFI absorption technology.
Helix One Mk2 Turntable
Width 600mm x Depth 480mm x Height 250mm (Without clamp or tonearm)
Width 23.6 inches x Depth 18.9 inches x Height 9.8 inches (Without clamp or tonearm)
Combined shipping weight is 105Kg (232 pounds) in a custom road case.
Recommended installation requires a surface capable of supporting up to 95Kg (210 pounds) and be a minimum of 620mm W x 500mm D (24.4 inches wide x 19.7 inches deep) for the isolation platform to be able to move freely.
Helix One | Dohmann Audio
dohmannaudio.com
