Conclusion: Highly Recommended!!! Extremely deep playing bass with an unbelivable dynamic respons. Good build quality. Good looking. Worth every cent. Best subwoofer i have ever owned and heard. I am using 2 5KW monoblock amplifiers strapped together giving me 10KW rms at 2 ohm. Nice :) I own the only 2 in Norway and i am never going to sell them.