Is an "ultimate Outlet on a switch mode P/S amp OK

I have an amp with a high quality Switch mode power supply.It is a modified Rowland 8t.It was the 2 chassis model,but I had the battery chassis updated to accomodate the new switch mode P/S.It is actually better than the battery,but I wonder if it would benefit from a PS Audio Ultimate outlet,or is that not necessary,as the switch mode P/S converts to pure DC.

Any thoughts would be appreciated.Thanks!