The external power supply allows you to get rid of the leads and the AC background. In addition, the removal of the power supply unit, as a source of strong interference, outside the rack rack improves the overall signal-to-noise ratio in the sound path.
Chepman 1073 is the best microphone preamp for recording voice, guitars, bass, wind instruments, synthesizers, etc. It gives the necessary density and filling, which allows the recorded material to fit well into any mix with minimal editing or without it at all. Class A makes the sound structure more musical and allows better and more accurate use of computer and hardware processing. The passive high-pass filter on the inductor delicately cuts off the excess bottom and does not distort the signal. The three-band equalizer covers the entire sound range, and the frequencies of the low and medium frequency regulators are selected taking into account decades of global studio practice. It sounds very musical, analog in the best sense of the word.