Tonearm Reviews

If you're going to spend a year-plus in COVID lockdown, it doesn't hurt to have a million dollars' worth of turntables keeping you company, right? That's been my good fortune. Sounds like a roomful, but it's only three: the SAT XD1, the TechDAS Air Force Zero, and the OMA K3 ($360,000, footnote 1).

You'll find this issue's cover girl either strikingly beautiful or homely. Visitor reactions fall strongly into one of those two camps, with nothing in between. I love the looks. Whatever your opinion, the K3's visual distinctiveness cannot be denied. The innards are equally unique.

Despite one website's recent claim that "Vinyl's Revival Is Already Fading," Nielsen SoundScan recently announced that vinyl sales for the first half of 2018 were up 19.2% over 2017, led by Jack White's Boarding House Reach, with 37,000 copies sold so far (and we know that N/S misses a great deal of the action). While on the West Coast looking for business, a friend of mine who's about to open a major vinyl-pressing plant on the East Coast was told by everyone that they're experiencing "double-digit vinyl growth." No one was seeing a slowdown ahead.

Technics' sudden decision, in October 2010, to stop making its iconic SL-1200 direct-drive turntable, then in its MK6 iteration, took vinyl fans by surprise. At the time, although sales of vinyl and turntables for home use were surging, their use in clubs was falling as DJs moved to the digits. According to Technics (a division of Panasonic), production of the SL-1200 was stopped not because professional sales dropped, but because the factory tooling for manufacturing them had worn out, and retooling wasn't cost-effective.

How do you like your tangential-tracking tonearm: with a captured air bearing? If so, a stationary bearing and moving rail—or a moving bearing and stationary rail? A hovercraft-style air bearing? Trolley-wheel or servo-mechanical bearing? Or pivoted, with some kind of offset at the pivot or the headshell—or both? In today's crowded market of analog playback, you can buy whatever type of tangential tracker you prefer, from Bergmann, Clearaudio, Kuzma, Reed, Schröder, Thales, and others.

For a phono cartridge to generate current and voltage, something must move: a coil of wire (as in a moving-coil cartridge), or a magnet (as in a moving-magnet type), or a tiny piece of iron (a moving-iron type). In those rare cartridges that depart from the electricity-generating principle of the ones described above, it can be a displacement-measuring device in which a moving shutter modulates a light source to vary a supplied voltage (as in an optical cartridge), or one in which voltage is modulated when a tiny chip of silicon crystal is squeezed by a moving element, which varies the chip's electrical resistance (as in a strain-gauge cartridge). But regardless of what it is that moves in a cartridge, something has to.

In 2013, when I first wrote about it (footnote 1), the TechDAS Air Force One ($105,000) was that company's best and most expensive turntable; it joined the handful of products that have earned an A+ in our semiannual Recommended Components feature—a rating that remained in place for six years. But too much time has passed since the Air Force One was auditioned by a Stereophile writer, so it has now fallen from that list.

The catastrophic February 6 fire at the factory where Apollo Masters produced LP-mastering lacquers—flat aluminum discs covered with nitrocellulose lacquer—will be old news by the time this column gets to you, but the repercussions of the loss will be ongoing for at least the next year and probably beyond.