Direct Drive Rumble


I remember back in the 70s when direct drive was an upgrade from belt drive in every manufacturers lineup. This was before Linn, SOTA, etc. took over the world of turntables. Conventional wisdom has it that direct drives couldn't compete because they were noisier than belts. The theory advanced at the time and still held by many was that the belt mitigated the influence of motor vibration on the whole system. What I recall, however, is that there were consistently lower rumble figures for the DD tables over the numbers posted by the belt drive units. Is there another measurement besides rumble to indicate motor vibration and its deleterious effects?
macrojack

Showing 1 response by 213cobra

I've owned Linn, Transcriptors, Thorens, VPI, Pink Triangle, Mission, Systemdeck, Kenwood, Sony and maybe even some other belt drive turntables since the early 1970s. I was socialized in my early hifi days to prefer belt drive turntables. But some things don't stick. Continuously since 1980, I've had a Luxman PD441 (and later added a PD444) direct drive turntable. Various Linns, VPIs, Pink Triangles and Thori co-existed with the Luxman and it's the Luxman 441/444 that's always been left standing. They've won on sound, speed consistency, drive, tone, isolation, lack of noise, immunity from ambient factors. Rumble? I've never had so little on any turntable. It's essentially undetectable. If there's any coming from the turntable, it is dwarfed by rumble recorded into most discs. This Luxman series has a magnetic-repulsion arrangement for a "load-free" (I think it's really "reduced load") spindle/bearing.

A Verdier is interesting to me, but I stopped bothering with belt drive. I continue to get superb tone and energetic presentation from my Luxman PD 4XX turntables. Watch out for either a 441/444 and snag it.

Phil