MY Eden WT-400 is having problems. It's brand new, I got it from the US and brought it back to Australia. It works fine on 240V (after we converted it) and I played it at church on Sunday. I was really careful to make sure that I didn't drive it hard etc, but after playing it for like 3 hours, it started to produce a distortion with every note. It almost sounds like I am running through a distortion stomp box or something. I took the amp home and tried it out again, and it was fine for like 1 minute, then the distortion started again. We called the place we bought it from and they told us that it was the tube (which is what I expected). We replaced that with a good quality one, and it was fine agian for like 20 mins, but the distortion came back AGAIN! Have any of you had this problem before? I don't know what to do. I would really appreciate and help you can offer. I need to use it again this weekend!! PS. I don't have an active bass, it is passive.