I posted this over on avs,

I have been listening to the Rythmik for about an 1hr or so after level matching it.
I will use Tim's spreadsheet & measurement technique later this week after I enjoy it as is for a bit.
First off, the sub came packaged well, wrapped in a nice cheese cloth type sheet to protect the very impecable piano black finish. After calibrating I played some Multi CH SACD & DVD-A's on it. First up, Brothers in arms on SACD in 5.1. The first 3 songs sounded simply breathtaking. Very clean, chest pounding bass. Soon after my wall clock flew off the wall(was above the TV) The money for nothing track had amazingly tight bass that didn't float around after each note compared to my previous SVS.
Next was the track Brandon & PAtrick remember off the rob Thomas DVD-A (all that I am). That low bass drop at the beginning was intense! It went very low and shook the room. It was a note that can be felt more than heard, if that makes sense. In my opinion I had already determined the Rythmik reaches lower than the SVS. Next was output tests. I cranked some Eagles tunes and my DVD-A quad mix of DSOTM, the time & money tracks were awesome too!

For movies I demoed some Blu-ray discks such as Black Hawk down and later on tonight Underworld Evolution. During BHD, the Rythmik had more than enough output at its current 14hz high damping setting(for cleanest output). After my brief session so far, it has plenty of output(maybe even more than the SVS) and reaches lower at the same time while sounding cleaner(less decay---if thats the term). I cant get much more scientific considering I can't directly compare the SVS and Rythmik since the SVS sold a couple weeks back.

Some teaser shot for all..........




I will continue to evaluate and calibrate as I have more time.

So far very happy though

Great work Dave & Brian!

Brandon