hey, i was looking through brands of speakers on the web and came across this "Fi" brand that I've never heard of and want to know more about. What makes this type of speaker so special and if it really is so amazing, why is the price so low? I'm interested in building a new system with 2 18's and can go in my daily driver and want to get the most bang for my buck, literally. If anyone has any insight, please let me know.