
My dad had a set-up like this because my mom and him used to be DJs. I was forbidden to touch it but, in the 90s, when we had cassette players and CD players as part of a separate cabinet, those were hard to mess up.
So, as a compromise, my dad showed me how to power up all of the amps and receivers to get the cassette or CD player working. At the time we had a massive subwoofer next to our CRT TV and, when the subwoofer magnet messed with the TV coloring, my dad blamed it on our Sega Genesis instead of the sub.
Good times.
Or the POS rich kid from John Wick 4.