FAQ What is the power output of the CAD 120S MKII amplifier? The amplifier is rated at 60 watts per channel in triode mode and 120 watts per channel in ultra-linear mode into an 8-ohm speaker load.What are the vacuum tubes used in each channel? The vacuum tubes in each channel consist of one 6SN7 for the input gain, one 6SN7 for the driver stage, and four KT 88 output power tubes.What input options does the amplifier have? The amplifier features a balanced design with separate RCA and XLR inputs.