I'm not all that familiar w/ the PS Audio product, but I do have the VPI SDS. The SDS allows extremely fine adjustments to the frequency fed to the TT motor, so that with a strobe, you can set your turntable to EXACTLY 33 1/3 RPMs. On my VPI Scout, the SDS is actually set to 59.16 HZ, which gives me the exact speed I want.
Also, the SDS reduces the voltage that is fed to the motor once the motor is at speed. When the TT Motor is first turned on, the SDS feeds it 115V. Once its up to speed, it reduces it to 72V. The theory is the less voltage, the less chance for noise.
Finally, I understand that you do NOT want to use Multiwave on turntable motors. But that you do not need to use the Multiwave on the P500 and can simply have it produce a straight 60HZ without "multiwaves."
Hope this of some help.
Coffee_nudge
Also, the SDS reduces the voltage that is fed to the motor once the motor is at speed. When the TT Motor is first turned on, the SDS feeds it 115V. Once its up to speed, it reduces it to 72V. The theory is the less voltage, the less chance for noise.
Finally, I understand that you do NOT want to use Multiwave on turntable motors. But that you do not need to use the Multiwave on the P500 and can simply have it produce a straight 60HZ without "multiwaves."
Hope this of some help.
Coffee_nudge