I currently have my rack in a ventilated closet just outside the listening room. After battling mechanical and airborne vibration for years, I have finally won.
The closet is just behind the wall with the speakers, so I have a 15 foot speaker cable run - longer than average, both nothing too extreme. I am very happy with this arrangement, though of course it may not be possible for most folks.
If I had to choose again between placing the equipment between the speakers or placing it on the sidewall, I would choose the sidewall, for the reasons mentioned in Jim Smith's book.
The closet is just behind the wall with the speakers, so I have a 15 foot speaker cable run - longer than average, both nothing too extreme. I am very happy with this arrangement, though of course it may not be possible for most folks.
If I had to choose again between placing the equipment between the speakers or placing it on the sidewall, I would choose the sidewall, for the reasons mentioned in Jim Smith's book.