Wow... Ok... Hmmmm... So I got the sub and it's freaking gorgeous! the piano black exterior is just fantastic. I work out, but man... I was quite exhausted caring that thing to my car- it weights 85lb. Very solid! The guy who sold it to me had a laptop on the top of it and there were no vibrations coming from the sub!
So, I got it in. Connected through LFE... quite disappointing. For some reason the sub goes super-low in frequency. I can see it moving, but can't hear anything - I'm not that old yet

So I connected it through line in in the sub - much better, but Still couldn't really say that it completely destroyed my Velodyne. I started to doubt my investment.
I decided to try the final - the recommended - connection through speaker wires. I connected output from both speakers to the sub speaker in. WOW... What a difference. Now... I have not used many subs before. I really liked by Velodyne before I got Vienna, but since the purchase I clearly saw a gap in performance. Getting back to the sub... I can't hear it as well as Velo, but I can feel it. Even my wife commented that now dishes upstairs vibrate much more violently

To test it out I turned on Tomoyasu Hotei's record called Battle without Honor. Previously Velo would just make crazy noise and I couldn't hear anything in the beginning. I had to close my ears to get through the first 20-30 seconds of performance. With Genesis, it turned out that It's a drum on the set that they are banging and I could hear every hit of the drum not only hear but feel it down to my bones.
So I'm completely satisfied with the sub. I have to roll it down to 60Hz for it to integrate well with Vienna's. Now I use my Velo to assist my center speaker with low end and use output from both L&R speakers to power Genesis. Love the outcome. Everything sounds so much fuller, not louder, but fuller. Took me some time to get used to not hearing the sub, but feeling it, but it's absolutely fantastic.
Jim, it feels that my 4 cylinder was replaced by v10, very low, very smooth, very fast...