Each speaker has two woofers with each having roughly an Sd of 300 cm^2, which means two 9.5" woofers.
OK, I should have posted something precise. So, for once and for all, here are the precise Genelec woofer sizes. I've calculated this
from this photo in the 8351B disassembly thread because it seemed the most direct overhead perspective. Note that these may be off if the woofers are not exactly the same proportions, so the other Ones could be a bit different.
Also, as far as I know, woofer size is typically(though there is no real standard?) measured by the outer frame, not by the end of the surround or the cone size itself. Since the Genelec woofers are not attached to an outer baffle with this type of frame, these sizes are probably underestimates. Correct me if I'm wrong, one of you real speaker designers out there
In all honesty,
I do think it is best to go by measured capability, NOT by vague size metric that doesn't include excursion or power. And
the 8361A matches up well with
the KH420 according to S&R's testing, so that's the real result.
All these caveats done, here you go.
All measurements except the last column in metric, not dirty imperialist measures
P.S.
Here is the spreadsheet, feel free to correct if I've messed anything up.
P.P.S Also this shows pretty well why the 8331A is absolutely not worthwhile unless you MUST fit a One into a tiny space.