The ac transformer is simply the origin of the audio quality A low quality transformer can reduce the audio quality. You can’t reach the “silence” and fill your room with the smaller details, if everything is covered by a hum noise generating transformer.
A balanced connector really stands for true balanced circuit? A balanced circuit is used to reduce the noises and interferences on very long cables. It has two identical conductors, but with different polarities. At the end they are mixed together to recreate a perfect noiseless signal. A balanced circuit A balanced connector
What the difference bewteen a monophonic amplifier and a dual mono one? To improve audio quality, a Brand can choose to make an amplifier with a mono or dual mono design. The same is true for the players, preamplifiers, power amplifiers etc… The better is the channel separation, the better will be the soundstage. So …