No offence Ar t, but you obviously have no experience with Proton gear. And yes those specs I posted are correct, as taken directly from the Proton manual. In their day the Protons were among the most powerful amplifiers money could buy, and even today they still make one of the best tube televisions on the planet. And no it is not a marketing play, ploy or other. They use twin transformers and are of a dual mono design, with over 60,000mfd of capacitence.
However, FYI, I have at my disposal several amplifiers, ranging from Rotel, AB International, Crown, Carver, Sumo, and Adcom. One single Proton is more powerful then all of them, some which are rated to 500 wpc, real world power.
Perhaps it is your belief that I am some how stupid, uninformed, or ignorant as to the workings of electronics, and specs as they go? I surely hope you do not think this to be the case, for if you do, you would be very mistaken.
BTW, since when is 7.3dB of headroom indicitive of a "smallish" PSU? These amps weigh 36.5 lbs each, as per my digital scale, not light, but certainly not Krell's either.
If you get the chance, audition one, you'll be impressed, when one considers their design, age, asthtics and cost. Even today - on ebay they bring $300.00- to $500.00, those who know what they are snatch them up as fast as they are posted for sale.
BTW, ever heard of Onix? Legacy Audio of Ohio? NAD?