Quotes from the test section
But does this make the f113 a bad subwoofer? No way! It's one of the best subwoofers I've heard, and by far the highest performing _small_ subwoofer I've ever heard.
Okay, so what do I think of the f113. I think it's an amazing subwoofer. It has the best performance/liter ratio I have ever seen when it comes to commercial subwoofers.
These are subjective opinions from someone IMO is capable of delivering an opinion. Far more information available in Illka's test and posts than some of the subjective garbage being posted here.
The OP doesn't need to understand technical data to make an informed decision, he needs to look at his budget, available space, and desired output and aesthetics.