Hi All, After completing (Except for the Linkwitz Transform) my DPL12 based sub running off my DIY sub amp I found a rather attractive price on the Aura Interactor Vests here in New Zealand. They were going for NZ$15 each - that's around US$8 a pop. This includes the vest (Has a single 25W shaker in it), a small amplifier and it's power supply, plus a bunch of connecting cables including an RCA set, RCA to 3.5mm mini plug, RCA to just about anything else, and 2 y-splitter RCA sockets. A pretty good deal IMO. These can be found really cheap in close-out houses. I got mine from Jaycar First thing I did ofcourse was try it out. Needless to say, I wasn't too impressed - the main problems were that there is basically no low-pass filter in place, so you can hear dialog etc. from the "shaker", and the plastic vest rattled like nothing else! Last night, I ripped open the vest, and extracted the shaker, then bolted it to a piece of 18mm MDF and screwed it up under the seat of a Lazyboy. I then powered it off it's small amp, set it's level to around 3 on it's scale (Goes to 10) and ran it off the sub-out of my DIY sub-amp (Effectively crossing it at 80Hz with a 4th order low pass). WOW!! With just the single shaker, and such little power (I estimate only a few watts) the effect was really good. It only shook during really loud, deep passages, and really added to the experience - especially at low volumes. My wife, who came home at a rather inappropriate time (seeing the lazyboy which was only purchased at Christmas upside down, and me drilling away inside the thing), also thought it was great - once she'd had a go! I now plan to put 2 shakers in each Lazy Boy that we have - probably positioned towards the back of the seat, as there is plenty of room there and it doesn't interfere with the mechanism. I found that the place where I first tried the shaker, you could just feel it through the cushioning when you sat down - not acceptable. Hopefully I'll have time tonight to do up a nicer, more permenant mounting system with the 2 shakers. I'll be sure to post pictures and a description of the process and effect once I get it working nicely!