I noticed something wierd in regards to the powerfail, although i'm willing to bet it was the adapter I was using.. I'm using a supposed 12V/2Amp radioshack adapter, which has worked fine in the past.. The adapter actually registers 15V when tested... Lately, I've noticed that the empeg likes to shut off and display the battery sign when using this adapter... It's probably just a bum adapter; i'll have to try it with the empeg adapter and see if the same thing happens..
-mark

...proud to have one of the first Mark I units