I simplify unvoluntarily my system ( i lost my house/dedicated speakers/room ) because now the amplifier for my headphone is plugged in the wall near the main electrical frame, nothing else...it is a very low noise amplifier...
My headphone experience now will destruct most speakers in non dedicated room and even some in dedicated room...I know because i build one dedicated room few years ago......
The soundfield has never been better...And anyway my AKG K340 goes under 30 hertz and give electrostatic highs with 3-D sounfield...
But i felt a great improvement by reducing all the system connections to one plug near the main electrical panel... my dac is battery powered... The high floor noise level decrease a lot with no power cord and no more purifier etc...