My HT is now 7 years old (pre-Atmos era), I want to gut all the electrical in it and start over.
Moving forward I want all of the wires running in metal conduit for the purposes of EMP shielding.
I have roughly ~1 mile of copper in my HT, and 0% of it is shielded (to even the most basic degree...)
If a pulse hit it, my entire system would be a goner. (As would most of the continent...)
That just simply isn't good-enough.
I want it shielded, which is gonna require gutting the rack room down to the insulation, and using metal conduit for all the electrical and speaker wires in the columns (at least to the wall terminals.)
That will reduce my attack surface from 1 mile, down to 10ft exposed runs.
I've already upgraded all of my HDMI wires to optical HDMI, and a wireless air-gapped network.
Ideally I want the rack room to be triple shielded, because I know for a FACT that I won't be able to achieve a perfect gapless seal to MIL standards.
In front of the insulation I'd apply a layer of aluminium foil, then re-apply the greenglued drywall.
Then the drywall will be painted with RF absorbing paint. Comparable to stealth paint.
The third optional layer would be stainless steel mesh around the rack itself, this allows the electronics to exhaust heat while adding an additional layer of shielding.
The Motu's, Ubiquity's and FP's already have pretty good RF shielding from their own chassis design, and my computers are made from 3mm thick solid-aluminium on all 6 sides already. It all helps.
I will also be placing my solar panels inside stainless steel mesh, so long as they don't lose too much efficiency from the shading...
I will also be adding ferrite chokes on every solar panel conductor both at the panel, just prior to the shielded room, and within the shielded room, snap-on's and/or 3" solid rings.
Additionally, all conductors will have grounded DC and AC "whole-house" style SPD's.
This is in addition to the A-1-1 SurgeX's and UPS's and ESD network surge protection that is already in place.
Further more, that inverter is also an isolation transformer, so it is galvanically isolated.
Once I pull all that off, I should have one of the best EMP-resistant & surge-resistant rack spaces owned by a residential civilian...