gold note ph-10 placement

Can the Gold Note PH-10 and the PSU 10 be placed side by side or stacked?


I have placed my PH-10 and PSU-10 side by side with 4" separation. PSU on left side per manual.

Per manual: To achieve the best performance DON'T place the PSU-10 on TOP of the PH-10 but on its LEFT SIDE.
Avoid placing the PSU-10 too close to the PH-10 if possible.

Like with any stand alone ps it's best to separate but they can be placed either side by side or stacked.