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Is this a good thing for an amp, to have trioidal transformers in both the supply and output transformers. One amp (Polish Ampliphon) makes this and claim it's an advantage to do so.
Follow Ups:
With toroidal output transformers you need perfectly matched pairs of power tubes tubes. Otherwise they saturate very quickly and distort the sound.
BTW, the Polish vendor AMPLIFON is said here to make quite reliable and nice sounding gear.
Toroidal transformers have a naturally wide bandwidth. A typical power supply transformer will pass frequencies greater than 20Khz. Some folks think this is bad for powersupplies because they leave in too much crap. But there are other benifits too.
I think you man toroidal. The advantages for a power xfmr are clearer than for an output xfmr. Toroidal cores leak very little magnetic field, so they have less crosstalk with other circuits, a good thing. That's great for a single-frequency xfmr like a power unit. Design of an output xfmr is trickier and involves more tradeoffs. Lots of amps use toroidal power units, few use toroidal output xfmrs.
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For looks, these amps are eyestoppers. They are big, beautiful and superbly finished. The sound is average-better than average. The price is below average (I think--everything is expensive in DK; in Poland, these are probably $1500-$1800 or so as a guess). I only heard them once, but i must say it was the eye candy aspect that appealed to me.
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