biscuitdough wrote: Sun Jan 02, 2022 12:07 pm
The internal suspension is to isolate the tonearm from the motor. It’s not for decoupling from the floor.
it is on my turntable. The suspension isolates the platter/arm/subchassis from any external vibration, whether from the speakers or the environment. Its resonant frequency is somewhere around 6Hz. So the turntable suspension can handle things above 6Hz. Below 6Hz you have a problem. The ideal platform for MY TURNTABLE is a very rigid light structure that is so light its resonant frequency is above 6Hz. The turntable can deal with any vibration that this platform/structure passes.
Since a small light end table is often not tall enough or takes up too much floor space, wall mouniting on a solid wall is a good way to isolate the turntable from footfall, since the wall will not move as much as the floor. The shelf I showed is another small light rigid structure whose resonant freq. is somewhere north of 5Hz, which is the range that SoTA Turntables, AR turntables, VPI turntables, Ariston turntables, SME turntables, Linn turntables, Thorens turntables and other suspended designs are meant to handle. The low mass crowd, led by Rega, Project, Music Hall and the like uses rubber feet and light stiff materials in the platter and body but not sure how it all is supposed to work. I do know these platforms are very very sensitive to footfall, much moreso than the suspended players. Rega also sells a wall shelf with special little cups to catch the distinctive 3 rubber Rega feet.
High mass heavy as shit turntables I do not understand at all. I guess only that a 75 lb turntable itself will effectively refuse to get excited by any vibration over 2hz or something. But I don't understand why you wouldn't want a mechanical high pass filter as part of your turntable design.