The transfomers referred to in that article are output transformers, not power transformers. They will affect the sound because they are coupling the output tubes to the speaker.
Linear power supplies are noisy too. They can sometimes cause hum or buzz in the output of the amp due to the power transformer. For the switch mode power supply, the frequencies are out of the audio band so you won’t be able to hear them.
Linear power supplies are noisy too. They can sometimes cause hum or buzz in the output of the amp due to the power transformer. For the switch mode power supply, the frequencies are out of the audio band so you won’t be able to hear them.
