Measurements of a set of LCD-4 by Andrew:
And as quoted:
One caveat here is that this is not a unit from 2021, but rather an older unit with the 2021 pads applied. It might be worth noting that, as Audeze has changed other things on the LCD-X for the 2021 revision beyond just the pads, and I have no idea if anything else would be different on the LCD-4.