Thank you, Dennis. Good learning.I see this in post #3:
"Now to increase the bias to the recommended amount, 400mV (I had it just on the edge and the meter read .39 when I took the photo….) 400mV bias = .85A = 18W/device"
The 18W here refers to the each mosfet's dissipation. 6L6 measured distortion for ~1W into 4 ohms at different levels of bias current.