I have a bestech that has no burn that I was going to pull the tube from. I have a 4600 with good electronics and tons of burn. In the bestech, one side is 1.9 and the other was about 18 ohms. When I measured the 4600, I got 2.0 on one set and 0.0 on the other. I had been having problems with the 4600 blowing hots earlier.