I have had my Ultra for quite a while and there has not been any problems with it, until today. After a short break in the rehearsel, I powered up the unit again and the unit did not power up again. It has been sitting on the top of a power amp all the time, but I thought maybye this time it overheated some way. If so how long does it take to "cool" the unit down again. I quess there is some kind of protection built into it. I have taken the unit out of the rack, opened the box to see if the fuse was blown. I have waited for half an hour, but still no life. Is there anybody out there who has any ideas or is it straight to the postoffice and shipping to G66.........I was supposed to use it on thursday buhu