Your PS Audio dealer is selling for his own benefit, not yours, & is either misinformed or is fabricating "facts".
I have personal experience with the SDS. The truth is that the SDS is more than a high stability waveform regenenator with a variable frequency output. It is also a standalone motor controller, comparable to only the more expensive Walker unit. These are true motor controllers because after they start out at full output voltage, they then sense the diminishing of motor startup current & consequently reduce their output voltage to a minimum required for stable motor operation. The result of that voltage reduction is (sonically) quieter / more stable motor operation due to reduction of magnetic saturation.
PS Audio is not designed with this critical feature - your PS dealer is selling BS.
I have personal experience with the SDS. The truth is that the SDS is more than a high stability waveform regenenator with a variable frequency output. It is also a standalone motor controller, comparable to only the more expensive Walker unit. These are true motor controllers because after they start out at full output voltage, they then sense the diminishing of motor startup current & consequently reduce their output voltage to a minimum required for stable motor operation. The result of that voltage reduction is (sonically) quieter / more stable motor operation due to reduction of magnetic saturation.
PS Audio is not designed with this critical feature - your PS dealer is selling BS.