Conclusion: Installed one of these with a RF 500.1D amp in a vented box tuned at 40hz. This thing bangs, it hurts my ears and brain when its turned up. Response is a bit sloppy but that is expected with the vented box. If your looking to keep your bass tight and clean go with a sealed box otherwise go with the vented box to get the most sound out of your sub. I didn't think that one 10" sub could produce this much bass.
Summary: The 10" hits very hard and has a quick recovery. No matter what type of music you're listening to, it will meet or exceed your expectations. It takes a lot of power because of the Dual Voice Coils, but it will never let you down. I have two with a 2400 watt Rockford amp pushing them, and I couldn't be happier. You can't go wrong with Rockford Fosgate, it's a great brand. There's really nothing wrong with these speakers.