Luxman PD 441
Crystal Phase-Locked Direct-Drive Turntable (1978-1980)
with load free spindle phono motor
The Luxman PD441 is a direct drive quartz-locked turntable, but its most salient feature is its ability to remove all kinds of external load vibration thanks to our exclusive load free spindle system.
Actually, the quartz-lock system is effectively only in the suppression of external disturbing load variations ranging from DC to 1Hz, but cannot control those of relatively high frequencies (5-10Hz).
To reduce them, the flywheel effect of the platter must be utilized. The heavier the platter, the better.
But here arises a problem with respect to the life of the bearing.
With the new load free spindle system, the motor itself has the repelling power to float the turntable platter, which makes it possible to reduce the platters weight on the bearing to about 1/5 of its actual value.
Driving system: Direct drive
Motor: Crystal control, load-free spindle system, flat brushless DC servo motor
Platter: 30cm aluminium die-cast 2.5kg
Rotation: 33.33 and 45rpm
S/N ratio: no less than 75dB
Wow and flutter: no more than 0.025% WRMS
speed adjustment - jmela
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Luxman PD 441 / PD441 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 Luxman.