I have a tube system and it's next to window so I took a furnace duct, vent fan to pull the heat out of the room when it's really hot outside over the summer. I had to add a speed controller to get it quiet enough, not ideal but I only do it over the summer. I'm usually pushing 90 db at my listening location so it takes allot of ambient noise to over come it.
Get some B&W 802D3
Get some B&W 802D3