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By the way...

There are three differences between the VRDS transport and conventional transport:

a) Normal transports have the spindle motor and the laser on the same side of the disc. This means that the "puck" that spins the disc must be small so that the laser has access to the data. In contrast, the VRDS puts the motor on the top side of the disc. The drive "puck" then is full size so that it damps the disc. (NB. With a conventional transport the top of the disc can be damped with a full-sized "puck" if a top-loading mechanism is used.)

Also please note that this is exactly the same situation as was used for the old Pioneer Stable Platter CD mechanism, except turned upside-down. In the Pioneer, the motor and full size "puck" were on the bottom and the laser was on the top. This required inserting the disc upside-down. So the VRDS is essentially an upside-down version of the old Pioneer Stable Platter drive.

b) Teac claims to have developed a method for the servos to move the laser while maintaining perpendicularity to the disc better than a conventional laser head. I have no idea of the validity of this claim, and if so, how much of an improvement there is.

c) The obviously massive overkill construction, leading to outstanding rigidity and damping.

Make no mistake, the VRDS is clearly the best optical drive made today. But it is massively expensive as well. It's not clear to me that the performance of the VRDS couldn't be equaled by using a good full size damping disc (necessitating a top-loader) on a massively built conventional transport.

This post is made possible by the generous support of people like you and our sponsors:
  Atma-Sphere Music Systems, Inc.  

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