I owned SLI-80. It sounds lovely, and worked well when used conservatively. After full checkup from Cary, it made 70W from one channel, 55W stereo at onset of clipping, into 8ohm resistor. Mine was from a batch built with incorrect resistors that severely limits full power, first reported in a european magazine review. Cary fixed mine for free when I asked for it, but it still never made 80W even with brand new tubes. fwiw....