My ears hear true "alive" performance in the GM70 monos. I believe it only gives the appearance of running hot,because it is in the huge GM70 tube,not the transformer. In fact here is quote from Kara the designer of this amp from deHavilland GM70:
The single output tube is part of the story. All the musical information is happening in the same time and phase. Your ears then have an easier time reconstructing the image. Also the power supply in the Aries is very overbuilt. A good amplifier is like a pyramid. Nine tenths of the amp is really power supply, and one tenth is the audio circuit proper. You want the power supply wagging the audio, rather than the audio wagging the power supply. Our power transformer , for example, could easily run two amplifiers. By overbuilding here, the supply voltage sags very little when large demands are put on the amplifier.
I have heard nothing to date that pours more liquid gold into my soul than this fine amp. It does all right as far as I am concerned.
Tom
The single output tube is part of the story. All the musical information is happening in the same time and phase. Your ears then have an easier time reconstructing the image. Also the power supply in the Aries is very overbuilt. A good amplifier is like a pyramid. Nine tenths of the amp is really power supply, and one tenth is the audio circuit proper. You want the power supply wagging the audio, rather than the audio wagging the power supply. Our power transformer , for example, could easily run two amplifiers. By overbuilding here, the supply voltage sags very little when large demands are put on the amplifier.
I have heard nothing to date that pours more liquid gold into my soul than this fine amp. It does all right as far as I am concerned.
Tom