Just curious,
Do any car stereo companies actually make a 24v car stereo?
I would not think so, since the military never spec'ed them into their vehicles.
Unless you pull one out of a civy european car, because as far as I know, vehicles in europe run 24v anyway.
But if and when I want to do the same thing in my 1985 M1009, I will just do it the simple way,
find preexisting ground connection under the dash for grounding, and use a fused line to the front battery for power,
like someone else in this thread already suggested. No inverters, no taps to the 24v power blocks/strips,etc..
and just have one or two speakers in the dash, so I can avoid running wires everywhere & keep things simple.
Good night,
CJ