I use a Eden WT300 amp and there is always some hiss, like a white noise, even when there is no bass plugged. The hiss become really louder is the cab's tweeter is on. I lived with the hiss for a while, but I tried different rig recently and this noise is starting to really annoying me. I changed the tube, and bring the head to a tech, but everything was fine. Does anybody had this problem before (mine is a 1996 model) ? Is there a way to fix it ? If not, I guess I'll probably try something new, do you know of a amp that would be similar sounding, but much quieter ? I thought about the Walkabout, Hartke LH500 and Shuttle 6.0, but never tried them, how the sounds of these heads compare to the WT300 ? Thanks !