I wanted to quickly thank you for your very thorough report & review. Very good to hear you are suitably blown away with the results in your room. I also want to commend your effort in getting your system dialed in. Audyssey Pro is clunky, sometimes frustrating, but also very capable.
I often get questions of "Does the SubMersive need EQ?" The only correct answer is "no more than any other capable subwoofer". You can get lucky, and as you noted, it can sound impressive, but improving the system from that point really isn't just a matter of changing subs but getting the best use of them. Sometimes that's adding more in the right locations, other times that's some time and/or money spent on optimization.
Thank you for adding to the list of customers here who have shown others just how far you can take such a system when it's a priority.
Hey Mark - thanks, but it should be me who is thanking you!
It is an understatement to say I am throughly delighted with the overall improvement (not just the bass) that my dual F2s have made here. I am at a totally new level of enjoyment from my small HT. The optimisation process I went through is very rewarding as you suggest - and I may even continue in that regard, although I am not sure I can audibly improve on the graph you have already seen.
I also wanted to reassure anyone with a small room that one, or even two, Submersives are not out of order. Mike Duke has already done a sterling job in that regard and it was he who inspired me to take the plunge in my similarly sized room. I think there is a (mistaken) school of thought that believes that very powerful subs may be 'overkill' in small rooms, but Mike's experience and my own shows that this is not the case.
Add me to the Totally Satisfied And Delighted customer list! Oh yes!