I don’t really see the problem with using ground-plane measurement if all the subwoofers are being measured the same way. Coincidentally my subwoofer is sitting on my floor and not on a 90 foot tower in my living room (now that would be one heck of a vaulted ceiling).

Though I do agree with the general sentiment that these types of “shootouts” where products are ranked tend to be problimatic.

3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1