JH Reproducers Formula 4
Fluid Damped Uni-Pivot Laboratory Standard Tonearm
The JH Formula 4 tonearm is a product of extensive research over a period of several years.
The need for such an item of audio equipment becoming increasingly evident with the significant advances in technology of the manufacturers of magnetic pick-ups and the appearance of ultra high compliance models.
Effective length: 240mm
Mounting distance: 225mm
Rear clearance: 65mm
Height adjustment: 45mm
Pivot: hardened steel needle resting in concave jewel rondel surrounded by silicone fluid
Pivot friction: below 0.005g at headshell
Effective mass: 4.05g (as seen by stylus)
The JH Forumla 4 arm is a tribute to it's designers and their awareness of the demands of their customers - Australian HiFi 1974
With all of the cartridges tested in the arm, we found tracking to be exemplary. The Forumla IV is extremely stable and all the cartridges tested gave satisfactory performance when played with a downforce close to the minimum recommended by the manufacturer - HiFi Review 1976
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JH Reproducers Tonearms
JH Reproducers Formula 4 / IV owners manual, service manuals and schematics are for reference only and the Vinyl Engine bears no responsibility for errors or other inaccuracies. The PDF files are provided under strict licence. Reproduction without prior permission or for financial gain is strictly prohibited. This website is not affiliated with or sponsored by JH Reproducers.