i have a room built on concrete, inside another room, inside a barn, 75 feet from my home, in the middle of 5 acres, in the mountains, away from any urban activity.
so zero outside ambient noise comes in. no mechanical systems in the structure to source noise.
my HVAC has it’s air box isolated by rubber and it’s in the attic not above my listening room. there are -3- 90 degree turns in the air vents to the air output. twin outputs and twin returns for high volume, low flow zero noise. the heat exchanger is outside on the opposite side of the barn with three inside walls between it and my room.
when the HVAC cycles on i can hear a soft relay when the music is not playing. that is rare.
it’s quiet. spooky quiet. my signal path gear has very low self noise.
and the inverse is also good; i can go completely crazy at high SPL's and no one can hear it outside the barn.
so zero outside ambient noise comes in. no mechanical systems in the structure to source noise.
my HVAC has it’s air box isolated by rubber and it’s in the attic not above my listening room. there are -3- 90 degree turns in the air vents to the air output. twin outputs and twin returns for high volume, low flow zero noise. the heat exchanger is outside on the opposite side of the barn with three inside walls between it and my room.
when the HVAC cycles on i can hear a soft relay when the music is not playing. that is rare.
it’s quiet. spooky quiet. my signal path gear has very low self noise.
and the inverse is also good; i can go completely crazy at high SPL's and no one can hear it outside the barn.