First time I visited Koren's website and read about his "perfect amp" was about 10 years ago (around 2006 - when I was designing and building my "perfect amp"). So this article definitely brings me back to simpler times.
I always found this design waaaay too complex. Some sections seem unnecessary while others don't make sense (but that's just me - and it doesn't help that the schematic is drawn a little convoluted). But I suppose it totally depends on his amp's application (e.g. playing records, studio monitors, live guitar, bass amp, etc), so it really may be the perfect amp ...for his specific application.
My thoughts... the power supply is a little too "verbose" for a tube amp -- just unnecessarily complex, and may actually remove some of the imperfections associated with that crispy "classic tube amp" sound. But I am a strong advocate of a well-designed power supply, so I can't say anything bad about it. But there's too much going on between phase-inverter and power amp stages (output drivers I presume). I would never do that, but to each their own. However, I do like that he used 6550s. Great tubes!
I always found this design waaaay too complex. Some sections seem unnecessary while others don't make sense (but that's just me - and it doesn't help that the schematic is drawn a little convoluted). But I suppose it totally depends on his amp's application (e.g. playing records, studio monitors, live guitar, bass amp, etc), so it really may be the perfect amp ...for his specific application.
My thoughts... the power supply is a little too "verbose" for a tube amp -- just unnecessarily complex, and may actually remove some of the imperfections associated with that crispy "classic tube amp" sound. But I am a strong advocate of a well-designed power supply, so I can't say anything bad about it. But there's too much going on between phase-inverter and power amp stages (output drivers I presume). I would never do that, but to each their own. However, I do like that he used 6550s. Great tubes!