Yes, Ted and Elk are correct. The simplest way to think of MultiWave is a means of extending the peak charging time - the time the sine wave remains at its peak - as Elk was showing. That should act as if the power supply has more capacitors because there will (or should) be less ripple since the capacitors are able to charge more.
Not every product sounds better with more power supply capacitors. And remember, there are very few “rules” for high-end audio performance. We’re trying to second guess your equipment’s designer as well as adjust the synergy within your system.