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Tubes to Watts Ratio

I own a pair of great sounding Quicksilver M60s that produce 60W per side using 4 EL34s per side (PP configuration). These amps also have what appear to be pretty serious power supplies, as both transformers are no joke. I've noticed that most PP amps with this many tubes per channel and this kind of iron produce anywhere from 20-40 more watts. Does anyone know why such a design would not pump out a bit more juice?
bojack

Showing 2 responses by bojack

bojack OP
630 posts
 
Mike,

Not sure because the manual doesn't specify and I cannot seem to find much info on line. My guess is UL, as these were made circa mid 90s when triode wasn't fashionable. On the other hand, they are very midrangey and sound like what I think a triode amp might sound like.
bojack OP
630 posts
 
Auxetophone, thanks for explaining the auto bias fact. I knew it was auto bias but not how this affected power.
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