Do you still need a separate power supply for the 5.2 version?

The Gold Note PH-5.2 phono stage can be upgraded with the PSX-5.2 power supply: https://www.futureshop.co.uk/gold-note-psx-5-2-dedicated-power-supply While the PH-5.2 performs well without the power supply upgrade, any phono stage benefits highly from improved power delivery to isolate the unit from the electronic noise that phono components are particularly susceptible to.