I was going to add to that actually. There are better options in the price range. The Dayton Sub-100 (10") is often priced at $100, and the 12" very close to that too when on sale. Break the piggy bank for that extra $40-50 and you can get a 15"... These subs at least offer 25Hz performance and significantly cleaner output than the Polk. Still not going to vibrate your couch (the 15" probably will

), but they're a better value.
http://www.parts-express.com/dayton-audio-sub-1000-10-100-watt-powered-subwoofer--300-628
Nothing wrong with your review, just realize that people tend to expect data to go along with a sub review because it is a different category than most speakers. I think that's the reason for the flak.