two locations, two power protection, everything plugged into the two power protectors
= two separate circuits, 1 at 9, 1 at 12.
IF your panel breakers are 20 amp, then 20 amp ckts; however many panels are 15 amp breakers, thus a 15 amp circuit works, unless you think you might upgrade the panel in the future.
So, you have 1 and add 1 power protector: I went for this one with 45 amps peak reserves. Note: it is a 15 amp device. (note: you want the PFR version)
https://furmanpower.com/product/15a-prestige-power-conditioner-w-power-factor-technology/
there is always someone having it on sale, this one currently
Next, for a lamp or two, record cleaning machine, any equipment not audio signal related, a 3rd separate circuit with duplex or quad outlets looped to 9 and 12. A beer/wine cooler!!!!