26 Volt 1 year ago "Still looking to see if anyone with the math skills will help bump the power rating up. Or, discuss how this and an Exec run 2 6V6's and be rated 13w and 20w respectively. And how this affects clean head room. " 1) A class A inverter like the Excelsior has will have less output than a Long-Tailed inverter will, like the Executive has. 2) Cathode-bias is another limiting factor. 3) The output transformer looks fairly small as well. If I want LOUD I'll use a 40+ watt amp, for the den or for recording 5-15 watts is plenty for me.