Just thought I'd add my $.02 to this...

From my experience, the empeg has done *extremely* well. I have never once had the unit falter because of rough driving.

And when I say "Rough Driving", I mean it. I abuse the hell out of my car, taking it offroad at high speeds on a regular basis. My first aftermarket purchase was a large front skid plate, which has several large dents in it now, if that's any indication. Hell, a week after I bought the car, I un-beaded a tire off the rim, hitting some ruts sideways at about 45mph. Yeah, I'm a nut.

So anyway, I am completely and utterly impressed with the empeg. Somehow, it has lived through over a year of my driving the car, and it has never failed me. Hats off to the empeg guys for making the unit burly.

As far as your unit goes, that sucks. It could be a freak occurrence I suppose, but it could also mean that something is loose inside the unit. If that happened to me, I would most likely take it apart, and make sure that every connection was nice and tight. I might even rig some kind of clips on the IDE connections, if they didn't seem to be tight enough. But that's just me. I tend to go overboard when it comes to attaching things. Lots of nylock nuts, locktight, that sort of thing...