A bold approach to tonearm design

South of the capital Tokyo lies the beach-side city of Kamakura Japan, home to ViV Laboratory, manufacturers of the Rigid Float tonearm. The company is the brainchild of engineer and founder Koichiro Akimoto, who founded ViV lab in 2008. The primary goal of his tonearm design is to eliminate all unwanted resonance during playback for maximum sonic clarity. The ViV Lab Rigid Float tonearm achieves its goal by embracing radical design choices and unconventional materials. The result is an elegant tonearm that will allow your phonograph cartridge to perform at its very best.

TONEARMS


Three main design principles make the ViV Labs Rigid Float tonearm special…

First, the tonearm is free-standing. It does not physically attach to your turntable, which means it is not directly coupled to any source of vibration or noise. Its weighted, non-slip base is designed to provide perfect mechanical isolation. This characteristic also means the arm is compatible with a wide range of turntables as a primary or secondary tonearm, with no drilling necessary.

Second, the tonearm uses a proprietary magnetized oil in the bearing mechanism. Arguably the most critical goal of tonearm design is elimination of friction in the bearing. The material used in the Rigid Float, sometimes referred to as ferro-fluid, is nearly friction-free when placed in a magnetic field. The oil also acts as a damper against acoustic vibration, further enhancing clarity and transient response.

Finally, and perhaps most importantly, the tonearm uses zero-offset geometry, making resonance optimization the top priority. The trade-off is higher tracking error at the beginning of the disc, but the advantage is the elimination bias force, making anti-skate unnecessary. Groove modulation is never constant across the face of a record, yet conventional tonearms require the user to choose a fixed anti-skate force, placing the cartridge into a state of constant entropy during playback. The ViV Labs Rigid Float completely resolves this issue, allowing your cartridge to track with perfect lateral stability. Subtle details and textures that would otherwise be lost to resonance are reproduced clearly and beautifully.

Rigid Float “HA” and “CB” series tonearms

The ViV Lab Rigid Float tonearm is available in aluminum or carbon fiber versions, and in 7 inch, 9 inch, and 13 inch lengths. The weighted base of the tonearm comes in a metallic black or gold finish. All ViV Lab Rigid Float tonearms come with the specially designed “Nelson Hold” headshell, which uses a center stabilizing pin to provide further rigidity to the cartridge.

Analog Accessories


Headshells, Stabilizers, and more

In addition to tonearm manufacture, ViV Lab also offers a variety of innovative analog accessories, including the patented “Nelson Hold” headshell included with the Rigid Float tonearms, as well as turntable stabilizer sheets which optimize resonance and flatten warps, and their own line of single driver speakers. Not all ViV Lab products are yet available in the USA, but Sierra Sound is happy to assist with any special requests or product inquires

TECHNICAL SPECIFICATIONS

Pivot to Spindle distance* 227mm (7” version) 274mm (9” version) 370mm (13” version)

Effective length* 209mm (7” version) 259mm (9” version) 359mm (13” version)

Overhang -18mm (7” version) -15mm (9” version) -11mm (13” version)

Height of arm center 57 to 77mm (all models)

Offset angle 0 degrees (all models)

Weight Approximately 4-5 lbs (all models)

*placement specifications assume a 55mm distance from back of headshell to stylus. This value may vary by approximately +/- 6mm depending on cartridge type and cantilever length

MOUNTING SURFACE TO PLATTER DISTANCE

The Rigid Float tonearm is designed to operate best when placed on a surface that is approximately 45mm to 65mm lower than the top of your platter. This value may vary by +/- 3mm depending on cartridge height dimensions. For turntables without sufficient platter to surface distance, outboard placement of the tonearm is recommended.

Tonearm placement diagrams (all measurements in mm):


CLICK TO DOWNLOAD THE RIGID FLOAT MANUAL IN PDF FORMAT

What People Are Saying

 

“I threw every cartridge I had on hand at this arm, and each one of them sounded as good as or better than they ever have.”

— Ken Redmond, The Audio Beatnik

“...the Rigid Float ‘arms will represent an audio coup De foudre - once heard, impossible to ignore or forget”

— Roy Gregory, TheAudioBeat.com