Michael Fremer did a review comparing the VPI SDS with the Walker motor drive controller. I don't recall what year or issue. Try looking it up on-line at Stereophile's Website. I recall that there was some useful info to be gleened from there.
I bought an SDS for my 19 Mk. III and find it to offer alot including variable voltage which allows me to lower the input voltage to the motor after startup. Plus, I have to admit, it looks much cooler than the Walker unit.
I bought an SDS for my 19 Mk. III and find it to offer alot including variable voltage which allows me to lower the input voltage to the motor after startup. Plus, I have to admit, it looks much cooler than the Walker unit.