Relationship of amplifier sound to transformer quality?

Good info guys. There are many parts in audio designs that can impact the sound. Ps caps trannies resistors etc. polite on makes good tram
nsformers as I repair counterpoint products. Significant change in sound not always but yes.  If the power supply is poor then I would not waste my time. The dad I build has a better powers supply that most amps I see.  Happy listening.