I am using the Anti-Mode 8033B with my LFM-1EX..I find it very easy to use and very effective. I have read reviews comparing it with the SMS-1 and the reviewers found it to be just as effective but a better value, and since it's self-calibrating much easier to setup.

Of course, right now with the latest promos, the SMS-1 is a good value.

The whole purpose of the 8033 is to match the sub to the room. It works with multiple subs also.

Maybe a more difficult room would benefit more from more manual manipulation. Not having used the SMS-1 I can not make that comparison at this point.

But it's good to have options!