Lewm9 wrote
But “best speed stability, etc” and “accurate reproduction of the master” are two different criteria. One is scientifically measurable and the other is inescapably a subjective judgement. However to reach the latter goal wouldn’t you want to have reached the first goal (absolute speed stability) along the way?
The man (lewm9) is correct – how could it be otherwise. If K3 was say 75% less accurate (a wobbly jelly) could it approach “accurate reproduction of the master.” Don’t think so.
Another poster wrote: Â every DD I have heard sounds thin, lacking body, are grainy or have a grey wash through the sound, possibly due to error correction servos.
Seemingly these DDs were not good examples of the technology ie made to a price, as the majority of cutting lathes were/are DIRECT DRIVE.
If you are going to bash DD you have to throw out the DD cutting lathes and drive them with a rubber band.