I was using a power conditioner from furman (elite 15 pfi) but the switched on and delayed switched on outlets need to be triggered by a 12v trigger input, which I don't know how to supply easily and turn it on/off using a button or a remote.If your preamp has a "switched power outlet". you can simply use a DC12v Walmart with 3.5mm output plug to provide the 12v trigger to your Furman elite 15 pfi.
https://www.amazon.com/SoulBay-Universal-Switching-Selectable-Suitable/dp/B01ISM267G/ref=asc_df_B01I...