There are many definitions of the term "active", and these include piezo and voice-coil computer-controlled cancellation devices, pendulum based systems, vibration modifiers such as elliptical cup and ball systems, oil and fluid damped spring systems, c-shaped elliptical spring systems and self-levelling pneumatic systems.
Suffice to say, one could fill several hundred pages describing various methods of tackling the problem of isolating an actively vibrating object ie. Damping is an additional consideration into this mix and is a critical part of developing a working solution. Damping is required. Imagine driving a car with a spring suspension and no shock absorbers. It is quickly apparent that a damping mechanism such as a shock absorber is critical to reducing the amount of cycles of the suspension system experiences when exposed to external stimuli.
So the properties of the damping mechanism are important as are parasitic effects of combinations of materials. These must be taken into account when designing a solution. Parasitic effects are caused by things such as bellows, fluid seals and other necessary engineering details to move from the purely theoretical to the real world.
In listening tests we confirmed correlations between the predicted isolation and the sonic results. This led us to question the prior art and forge new approaches to tackling the unique issues associated with turntable isolation.
For example if the motor and platter are connected by a belt and the motor is sitting on separate plane to the suspended chassis and platter then the suspension of the platter and chassis would be constantly excited by the reaction to bearing friction and Young's Modulus constraints of the suspension system. This stops bobbing, twisting, yawing, pitching and flexural modes visible under the Finite Element Method and audible to experienced audiophiles.
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Ps3 Fat. Yamaha's YSP-1 gives you a convincing illusion of surround sound from a single unobtrusive low-profile cabinet. Naim's "n Series" loudspeakers and electronics. See and hear it for youself! The Caliburn turntable takes its moniker from the original name of King Arthur's sword. Butler Audio's AVR home theater receiver will deliver watts of pure tube goodness into seven channels if it makes it into production. Oracle and VAC prove that beauty is more than just skin deep. Wes Bender of Innersound, no small man himself, stands next to the massive Kaya Reference.
Peter Clark of Redpoint Audio explains the mass-loaded, battery-operated design of his Model D turntable. What did you think?
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