So, i just recieved my henry the 8x8 hadn't used my amp head for about a week, plugged it in, and guess what, I had a mild distortion!!! Which got progressively worse with increase in tube gain. What could this be? I really don't think it's my cabinet since it's brand-spanking new, though i haven't had a chance to try it out with another head...... So, is this a preamp tube? or something else? I have never owned a tube amp so, i dont' know when the tubes are bad. I brought the amp to the local dealer in town to be checked out, so i'll know tomorrow what it is for sure. One more thing, the local dealer said that, the head isn't warranted thru him.......is this true? Do you have to take it back to the place you bought it from to be serviced under warrantee?