Conclusion: I bought this 6 months ago to replace a broken alpine. I am really happy with the purchase. It sounds great. Hits deeper than my previous sub and sounds cleaner. I would definetly purchase another one if I needed.
Conclusion: I purchased one of these subs and installed in a vented enclosure per specs. The sub was powered by a pioneer premier amp that pushes out roughly 400 watts rms at a 2 OHM load. I turned the amp half way up, and the subwoofer didn't handle it very well. The bass was choppy and slightly distorted at times. all-in-all, I'd recommend spending the extra cash and going with the "pro" series.