My Eden WT400 isn't working right. I have changed the tube, tried different cabs as well as headphones, checked cables, and the thing is still giving me problems. This is what is happening: It appears that the bass control doesn't work. The treble and master seem to both control the master volume. If the treble is down and the master volume is up there is no sound. If I crank up the treble, volume seems to come back. After about 3-5 minutes some strange sounds come out of the amp. It sounds like wind blowing or a plan taking off, and there's a few other odd sounds like frequency modulation. The noises start out quietly and then get louder and louder until the signal from my bass cuts out, and all I hear is the noise. After a few more minutes the amp shuts down. During this time the EQ clipping lights goes on and stays on until the amp cools down. It sounds like the amp is haunted. Right now the bass amp is not usable to me. It won't work for more than 5 minutes regardless of what bass or cabinets/headphones I use. So if anyone can help, I'd appreciate it. Thanks in advance.