Döhmann Helix One Mk.2 turntable Specifications

Sidebar 1: Specifications

Description: Two-speed, belt-drive turntable. Speeds: 33.3 and 45rpm (78rpm available upon request). Platter: 12" alloy/thermoplastic sandwich, 30lb. Integrated Minus K isolation system.
Dimensions: 23.6" (600mm) W × 18.9" (480mm) D × 9.8" (250mm) H. Weight: approximately 200lb.
Serial number of unit reviewed: DA-1019-058.
Price: $49,000 in black anodized aluminum, $55,600 in plated nickel and titanium finish. Approximate number of dealers: 5. Warranty: 5 years.
Manufacturer: Döhmann Audio Pty Ltd, Unit 2, 11 Friars Road, Moorabbin, Victoria 3189 Melbourne, Australia. Tel: +61 409 514 914 (tech support); +61 410 344 938. Web: dohmannaudio.com. Distribution coordinated by Döhmann.

COMPANY INFO
Döhmann Audio Pty Ltd
Distribution coordinated by Döhmann
Unit 2, 11 Friars Road, Moorabbin
Victoria 3189 Melbourne, Australia
+61 409 514 914
ARTICLE CONTENTS

COMMENTS
CG's picture

Cool! No listening tests or conclusions. The ultimate objectivist review for a turntable.

Or a simple glitch in the web presentation... :8^)

Archimago's picture

You must have missed the subjective comments on page 3. I guess the Caliburn is still the superior sounding 'table.

The only objective part in the whole review was the graph of speed stability. To that, most "objectivists" would say: "That's some jittery hardware!" :-)

Bogolu Haranath's picture

May be that hardware needs one or two jitter repelling, 'JitterBugs' :-) ........

jeffhenning's picture

...this is the turntable for you!

So this is better than a $500 computer hooked up to a Benchmark DAC3 exactly how?

Sorry, that was a dick question, but I do hope that you realize that this turntable is absurd.

This is akin to our glorious leader pushing incandescent light bulbs.

The only thing I can say is, "Enjoy the obsolescence."

Stay Corona free, baby!

CG's picture

For some reason, most of the content on page 3 was missing at first - probably not entirely uploaded at that point. All that had been presented in the first two pages was some measurements and a factual description of the product. Almost no opinion, informed or otherwise. Hence, only objective material.

That was the joke, as I suggested in my second paragraph. The actual content for page 3 is now there.

As for objectivists, I will leave my opinion off these pages.

Bogolu Haranath's picture

Your admiring opinions about the objectivists is welcome in these pages :-) ........

Ortofan's picture

... of this $50K turntable meet - let alone surpass - that of a $500 Onkyo?

https://www.analogplanet.com/content/onkyos-cp-1050-direct-drive-turntable-offers-extraordinary-speed-stability-attractive-retro

JHL's picture

...would anyone ask?

Bogolu Haranath's picture

Enquiring minds want to know :-) ........

Awsmone0's picture

with a surprise upper-register, single- chord attack followed by a flourish of gentle note-tickling. (There's probably a musical term for that that I don't know.) It all rang timbrally, texturally, and dynamically true

Oh really ;)

davip's picture

This TT (and the Helix 2 before it in AnalogPlanet) continue to get rave, technologically-rapt reviews, yet I would contend that Dohmann & Co. are not using the MinusK platform in the manner in which it was designed for. Both in this review and Mikey's Munich 2015 video (https://www.youtube.com/watch?v=LRGLXOFQKb4) it is stated -- extraordinarily -- that despite the amazing Minus K tech incorporated in this TT Dohmann puts the motor ON the subchassis. Listen to the video at 4'.05'', where the Dohmann rep describes the motor being on the same plane and "...moving with the suspension". He describes the Helix as being effectively immune-to and isolated-from "...ground-based vibration", but this is irrelevant as, while the Minus K's usage in SEM and EFM microscopy attests to the utility of this anti-vibration tech, the principal source of vibration in a turntable is not 'ground-based' but WITHIN the turntable, i.e., the motor, and thus this groundbreaking tech is bypassed to a greater or lesser degree.

Watch the appropriately-named video 'Famous Minus K Wine Glass Demo Described' (https://www.youtube.com/watch?v=evAx-1rv4lQ), and marvel at how how this extraordinary device isolates a filled wine-glass placed upon it from the stated earthquake-level vibration beneath it. Then wonder how this amazing device would work if the vibration source were placed UPON the Minus K along with that wine glass, as in the Dohmann Helix.

Show me a Minus K video with both the undisturbed wine glass AND the vibration source on the Minus K and I'll buy it, but this Dohmann TT is not, per the Company rep's description and Mikey's description herein, implementing the Minus K in the way that it was designed to be. I know that Mikey has a bee in his bonnet in regard to his 'porch-glider effect' (i.e., the notional -- but yet to be demonstrated -- belt-communicated speed variations that result from a motor not mounted on the subchassis), but I would contend that this effect, whether audible or measurable, is as nothing compared to the piggybacking of spurious 50/60 Hz motor noise on the audio signal that results from mounting the motor on the same surface as the transducer. The $3.5K Rega Planar 10 betrays itself in this regard through the application of a stethoscope, and while the Helix 1 is undoubtedly much better than even Rega's best singing-along-to-itself TT this tech deserves to be better implemented.

As I said in a comment on the Rega TT review (and Herb chimed in in-support of), it's time to test TTs with an accelerometer applied to the arm base to see just how isolating or not these various mechanical devices are. A stethoscope is a great idea and a good-start, but it's time to get systematic about this -- particularly when sums of $50k are being asked for.

A motor plonked on the subchassis that bears both the platter and arm = the Rega model of isolation. Jog-on Mr D...

tonykaz's picture

Egads, with 200 lbs of mass these guys could significantly minimize the affects/effects of tiny stray environmental forces on the platter/stylus workings.

It's basic physics : add mass to lower resonance.

Anyone can do this.

Tony in Venice

jgossman's picture
Quote:

Egads, with 200 lbs of mass these guys could significantly minimize the affects/effects of tiny stray environmental forces on the platter/stylus workings.

This is not true, and has been proven demonstrably by Mr. Gandy. Mass is a piss poor excuse for good engineering, and only stores low frequency energy - the harmonics of which destroy HF clarity. If the mass is part of OTHER engineering goals - the point of which in this case seems to be creating a "massless" plinth system, then it is, in fact, trying to serve in a rather unique way, Mr. Gandy's theory about plinth design. If you house a low pressure air bladder support in a concrete container - if for looks alone OR if you are convinced that's the perfect version of constrained layer damping, you're STILL resting your plinth/bearing on AIR. You see what I'm saying and why your statement is silly? I'm not trying to start a pissing match at all - just trying to show a flaw in your logic. The fact that so many people are chasing Mr. Gandy's key ideas by way of so many different designs should tell you all you really need to know about the flaws of high mass designs.

tonykaz's picture

Are you a Physics Understudy of Mr.Gandy?

You seem to be presenting Mass's physical properties using Mr.Gandy's "key ideas", can any of these be correlated to any Laws of Physics ?

I'm rather puzzled by your presumption of large Mass storing energy expressed by damaging harmonics.

You seem to be addressing these relationships in the manner of a layman.

Demonstrating something is not proving! Others repeating the experiment may result in proof or may not.

These folks are simply trying to sell pricy record players, they allege that they have a technical edge to high performance. Maybe they can justify their price, I doubt it.

This products death is from shipping weight and handling, compounded by being made on the other side of the world from most potential buyers.

Something smells >>)))))'> about this one.

Tony in Venice

Ortofan's picture

... series of articles on turntable (and tonearm) design written by a certain Joseph F. Grado and published in Audio magazine during 1977.
Copies of the magazines can be downloaded here:
https://www.americanradiohistory.com/Archive-All-Audio/Audio-Magazine.htm

wade's picture

Hey Mikey:
The Dohmann website used to refer to a future vacuum hold-down for the Helix One Mk2 in its product description . That phrase has recently been deleted. Has Mr. D abandoned that prospect? Inquiring minds would like to know.

SNI's picture

I live in Denmark and as far as I know, we have no university called "The University of Denmark".
We are a very small country with only 5,6 mio citizens.
We have 8 universities though:
University of Copenhagen
University of Aarhus
University of Aalborg
RUC (Roskilde Universitets Center)
SDU (South Danish University)
DTU (Danish Technical University)
CBS (Copenhagen Business School)
IT University of Copenhagen

There really is no such thing as the university of Denmark.

jorgen's picture

I think he was study at DTU

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