I bought a set of these a few years ago from parts express. I never had the chance to hook them up. I saw this thread and decided to give it a shot.
I just got a new 5.1 H/K receiver to replace my dead ProLogic one. I don't have a sub yet. I hooked the sub-out to one channel of AUX-in on an old fisher rack system amplifier, then hooked up 2 25W Aura shakers in series to one speaker output. This receiver has a 5 band EQ, so I pushed the lowest (50hz) setting to the top and the rest to the bottom.
It does work. I'm not really sure if I like it however. I think the problem is that since I don't have a sub woofer, and since my speakers are pretty small, there is too much 'dead space' between the lowest frequency that speakers can go and the highest frequency that the bass shakers can go, so the whole setup just feels fake.
In addition, my couch is a futon and the bass shaker is lodged in the back, behind the cushion, exposed to back wall which is right behind the couch. Some of the bass of the shaker reflects off the back wall and sounds really hollow and boomy.
I liked it best with the shaker volume turned way down, so the vibration & boom was small.
I'm not sure if I'll keep it or not. I do have to return the reciver to the basement where it belongs however. The fact that it works at all is very cool.