I'd be willing to bet that is exactly how he ran it. Looks like it was just pulled form the box and photo'dHe needs to remove the cover over the backplate though.... I assume he didn't run it that way, with the pole vent covered.
XXX's can sound very musical (SQ), depends on the enclosure/situation.
The motor size makes that 12 look like a 10 doesn't it? heh