Speaking of speakers 😏, I think there is one aspect of speakers that is quite often overlooked and that is decoupling them from the floor. If they are isolated they won't transmit vibrations through the floor and color the sound. It worked for me.
What makes the biggest difference in sound quality?
When making changes or adding things to your system, what makes the bigger difference in sound quality on preamp‘s and power amps? Interconnects, speaker cables, power cords, or fuses?