The wire room :

It's a room filled with electric cables, the cables are moving and have different tips (alligator clips, electrodes, probes, metal spikes, metal dildos…)
The cables are attracted to the bodies of the maso, at the beginning they bite and connect randomly and send random power shots. Sometimes shocks powerful enough to kill, which fry the victim who remains inanimate until she regenerates, sometimes shocks so weak that the maso doesn't even notice them.
The room and the probes capture sounds, heartbeat, breathing, brain activity… and little by little the room calibrates itself to find the perfect recipe for each maso.
The cables find the most painful areas, inside or outside the body, the maximum intensities, the perfect rhythm of the shocks… the experience becomes more and more unbearable for the maso.
The calibration usually lasts 10 or 15 days.
Once no more improvement is detected, the timer starts on the time it took to calibrate.
During the next 10/15 days, the maso will undergo the worst possible recipe for her, continuously.
She will be on the verge of a heart attack at all times, with specific sequences to wake her up when she starts to faint, to keep her continuously conscious and in unimaginable distress and pain.
At the end of the timer, the electricity stops and the maso has 5 minutes to free herself, otherwise the timer starts again for the same duration. The loop is infinite.
The experience is so intense and so long that most masochists don't even remember who they are at the end of the first loop, they are almost never able to move and go on for hundreds of loops, until they turn white.
The white born from these rooms are brainwashed and don't even remember what it is to be human.
The room starts from scratch with a new maso, but keeps in memory each maso that has been calibrated, if one of them comes back here, she will receive directly her perfect recipe.
It's a horrific trap for beginners, but a treat for experienced maso, who often return voluntarily to undergo an experience that matches their abilities.