Powering up a Sony KV-5200

[Eric H]

I picked up one of these today for $5, it's a little rough but not horrible.
I didn't get any cords or adapter.

It has an AC input with a cutout switch and a DC input labeled 12/24V.

Is the AC input straight line voltage? I realize it needs to push the bypass switch also but can I wire it directly to line voltage otherwise for testing?

What about the 12/24V DC input, can I just hook it to a car battery and see if it'll run?

This little "Portable" weighs a ton, presumably because I can see it has a Lead/Acid Gel Cell in the bottom.

For $5 I figured it'd be good for parts at least.