You are right, they use RMS but if you see the signal in the scope it's a "pulse" signal, variing from 6 volts to 0 volts. The electronic change the time interval from 0 to 6 to give you the voltage you want. Infact, if you set 6v, the signal is completely linear
My fear is that this "modulation" can affect the vape. Yes, we talk about milliseconds, but I have the feeling that if the output is pulsing 0v-6v "shots", in some small millisecond the atomizer is "off" and this can in some-how affect the vape. But of course I'm not sure about this, for this I was looking for some one that maybe has the three PVs
p.s.
anyway the lava itself is a really not-good device specially if you are used to a provari...