If you don't mind sharing, besides the SubM's what is the rest of your equipment?
Good points Bill. I suspect you are right on the money with your diagnosis of Graphitis Nervosa ;) Also, I hadn't considered your point about the barely-audibly 20Hz level - excellent point. That also explains why it sounds so much better than it looks.
MK S150s left, right, centre, M&K SS150 tripoles surround, M&K LCR55 heights, Onkyo 5509 prepro, Emotiva XPA-3 driving LCR, Emotiva UPA-2 driving surrounds, Emotiva UPA-2 driving heights, Oppo 93 BD player, Crown XLS1000 Drivecore driving Buttkicker, Panasonic BDDM35 BD player (Region 1 modded).
No, you do not need the AntiMode as well. But you might want one - the AM has user-customisable filters that you do not have in XT32 and some might consider running both together. I would absolutely want to measure the system to be able to see precisely what I was doing if I went that route, so REW or OmniMic would be on the same order when I bought the AM. Using twin forms of EQ can be tricky - unless you understand the issues fully, I would stick with XT32 - it does an exceptional job.
The AS-EQ1 gives you the equivalent of XT32 for the bass frequencies only. If you use an AS-EQ1 with XT, you will effectively have XT32 for the bass and XT for the rest of the frequency spectrum. The bass is where EQ is needed the most. But bear in mind that Audyssey made changes to the way XT32 EQs the upper frequencies. In fact, they EQ them a little less - XT was apparently 'trying too hard' with the upper frequencies and could sometimes do more harm than good. So an AS-EQ1 is a very good addition to an XT system, but it is still not as good as XT32.