My Classic Audio Loudspeakers are 6 inches from the rear wall and no worries. The down-firing woofers seem to be effective at dealing with proximity issues- the speakers don't boom even though they go down to 20Hz.
Duke of Audiokinesis had a set of speakers at the RMAF show ($4400/pair!) that can back up close to the wall too. They have a set of drivers that fire to the side walls, which is helpful for breaking up standing wave issues and at the same time allowing for a great sound stage.
Duke of Audiokinesis had a set of speakers at the RMAF show ($4400/pair!) that can back up close to the wall too. They have a set of drivers that fire to the side walls, which is helpful for breaking up standing wave issues and at the same time allowing for a great sound stage.