(thanks to those who already replied to this question on an earlier thread) I recently got a new Darkglass Microtubes 900 + DG410C - and have "tried" to use it twice at recent outdoor gigs. Both times the amp sounded perfect during setup but as soon as we started the first song, the amp shut itself off - then came back - then off again. Ridiculous. Had to go to a back up rig. I don't have a power conditioner but have been told it might be because of poor power supply - however, guitar amp, PA and lights all worked fine. Just mine failed. As a weekend gigging band, we are usually supplied a typical extension cord from a house or in a club, and that's it - but even when we play indoor shows, we won't get much better power than that. Of course at home it works perfectly at any volume I want. I've asked for a replacement 900 but really nervous to trust it again. Any thoughts?