I just hooked up the LFM tonight and it fits perfectly with the Gramma. Bass is killer. I just wish I could really turn it up but ,alas....darn townhouse neighbors! Oh well , it will grow with me when I move that's for sure. But I digress...
The Velodyne CHT8 had the speaker in the front and this one is downfiring but the Gramma seems to work well with both. I have tile flooring so I do not know how it would work with carpet but it made a big difference in my house. It seems to keep the really low stuff from getting sloppy and tightens it up nicely(forgive my highly technical jargon) .
Like I said before, I highly recommend it.