Tekton Double Impacts


Anybody out there heard these??

I have dedicated audio room 14.5x20.5x9 ft.  Currently have Marantz Reference CD/Intergrated paired to Magnepan 1.7's with REL T-7 subs.  For the vast majority of music I love this system.  The only nit pick is that it is lacking/limited in covering say below 35 hz or so.  For the first time actually buzzed the panel with an organ sacd. Bummer.  Thought of upgrading subs to rythmicks but then I will need to high pass the 1.7's.  Really don't want to deal with that approach.

Enter the Double Impacts.  Many interesting things here.  Would certainly have a different set of strengths here.  Dynamics, claimed bottom octave coverage in one package, suspect a good match to current electronics.

I've read all the threads here so we do not need to rehash that.  Just wondering if others out there have FIRST HAND experience with these or other Tekton speakers

Thanks.
corelli
I had two Vandersteen subs that I used for years with a variety of speakers but not with the DI's.......and they aren't missed at all. The DI's have some of the best bass I've heard. The bass goes low, it's tight, fast and blends seemlessly with the other drivers. Would adding subs make them sound even better? Probably, but I'll not be in a rush to do so........even as enticing as the Tekton Brisance subs look.
Thanks mac48025, that is just the kind of information I was looking for. Much appreciated!
mykeryte, wondering if you had any comparisons in the 5-8k range new that would be good competitors for the double impact? I just ordered them so obviously I am hoping they are very good. What do you think the Sahas do better or other speakers of a higher price point. I am really just curious so not trying to act like I bought world beaters since I haven't heard them yet nor have I heard the Wilsons. Did a demo with some big ole Focal speakers that I could never afford a few years back in a treated room powered by really pricey front end and it was jaw dropping. 
@strateahed , using an active sub on a full-range speaker with extended bass will provide the amp with an easier load to drive. The amp needs to use a higher amount of current to drive the low frequencies (more air to push), so if the sub can help with the low-end, then the midrange and low-mids will benefit by getting quality power from the amp with with no clipping.
If it's a large room, a subwoofer is a benefit to the sonics of the tower speaker.
I have owned the the 3.6 . .if you want real low Bass get a good powered sub Like 
JL Audio, or Rel.  Your panel is good only to about a honest 40hz at best. 
Your amp should be good wuslity and at least 250 wpc to not distort  as easy.
A good powered sub has several advantages.   For one  to take any bass  below 50hz.  It takes a big load off your amplifier,  and set to around 50hz your panel slso will be much more at ease to you. Without bottoming out.