Winners will be responsible for shipping!
NOTE: Unfortunately this giveaway will only be available to North American members due to the astronomical shipping costs otherwise. If someone outside North America were to win, it would not be reasonable for you to pay the shipping and therefore you would not be able to post a DIY project and review.
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sounds like an interesting giveaway.

but pity, NA for none US residents....

so you guys have fun!
check its spec, gosh, just driver alone is about same weight of my SB12+ from SVS!
Measurements
Mounting Depth: 26 cm
Total Depth: 26.5 cm
Outside Diameter: 46.7 cm
Weight: 41 lbs
Mounting Cutout: 43.2 cm