The P50 makes a huge difference to the performance of the Topping E50 DAC raising it to the next level. I wouldn't have thought that a power supply could make such an obvious difference but it does. The musical presentation is much more solid.
The power supply itself is very solidly built and seems to be cast from a solid block of aluminium.
As a bonus Melbourne Chi-Fi's service was brilliant with immediate delivery. Highly recommended seller and power supply.