I'd appreciate a proper working auto-off function as well. I won't pretend to know how they are designed, but I do know that I've owned many powered subwoofers over the years and the function worked perfect on every single one of them regardless of volume level I listened at.
Yes, my previous SVS 12 NSD had a perfectly-working auto standby, just came on and went off exactly as it should have. I left it enabled permanently.
I very much prefer my monitors without an auto off function. I'm one of the quiet mixers. I really reference things at every volume but often I get a better picture when things are quiet. A previously owned pair of focal's had a poorly set threshold, I would have to crank the volume on my interface then turn it down quickly. Having them turn off on you when you're listening or working at low volumes is more than annoying.
Despite the latest EVO models having an improved auto standby over the previous Alphas, mine, set to 0dB sensitivity, turn off as high as -35dBu on a Topping E50, especially with spoken word rather than bassy music. Yet, Focal states 6mV (-42dBu?), which in any case is still too loud for my tastes at night. I also have to crank them up briefly to get them to turn on again, which is obtrusive at night. It's a disappointing implementation of an otherwise subjectively excellent monitor and I have disabled it. Maybe Focal and Kali should liaise with SVS for help?
That said, with class D amps and smps, they consume so little, it is barely needed. Measuring one Focal Alpha Evo 65 with watt meter = idle at 4W, increasing to 5W when playing quite loud. I have no issue with leaving them on all day and just turning off before bed. I suppose the Kali LP-6 are similar and the IN models will be about 6 watts idle?
IMO, an auto standby is more helpful with more powerful amps and speakers, especially those with class AB amplification that idle at 20-30 watts or higher, such as my JBL 6328P's (24w each). Yet it's those very monitors, often older designs, that are less like to have an auto-standby option.