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In Reply to: RE: You've heard the VPI and Grand Prix dd tt's? posted by Rick W on December 04, 2016 at 11:41:40
If you want to buy a direct drive made in the last century you should be enjoying a CD player or computer made in the last century, it's the same thing. The sophisticated drive system in the VPI cost more to make than the whole SP-10 did and required a Cal-Tech computer expert to come up with the programming. I have an SP-10-3, a JVC-TT101, a Kenwood LO-7, and a Micro Seiki DDX-1000, they pale in comparison to the new designs.
No one loves old stuff more than I do but drive systems designed in this century are so much better than the old stuff it is not even close.
HW
Follow Ups:
Apart from the SP-10MK2 morphing to MK3....you said those same 'old' decks were "wonderful"..
I find this to be a very interesting subject about which I know only basics. When comparing solid state devices, like turntable drive systems, I would think that there are two possible ways in which a modern one should be superior to one that is 30 years old in design (the term "last century" loads the dice too much; after all, we are not talking about 100 years). (1) The modern design could make corrections much faster, by virtue of using faster transistors and/or op amps, and (2) the modern design could use brand new ideas about how to do the job of maintaining absolutely constant speed regardless of load variation, but still, in the end, speed has to be monitored somehow, and speed corrections have to be made once in a while, somehow. Can you say how the VPI DD turntable excels in these respects?
The L07D is nearly an opposite to the Mk3 in that it uses a coreless motor (vs the 24 pole motor in the Mk3) and speed corrections are deliberately kept at a minimum, whereas the Mk3 servo is always "working". The L07D seems to depend more upon platter inertia to maintain exact speed. I grew to believe that coreless motors are superior for DD, all other things being equal. Like I said, this is based only on my superficial knowledge and my ears.
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