I have them about 32" from rear wall. I have used both a small tube amp 3.5 watts per, and a t amp of 15 watts. The drivers are 97db so power is never an issue. I would think putting them too far from the wall would make them less effective. the front baffle is 24" wide
Open Baffle Convert
I recently took my 12" audio nirvana full range drivers out of their cabinets and into open baffles with wings. I can't believe the diference in sound. So much more 3 dimensional and lifelike. I was concerned the bass would roll off but I dont find it a aproblem at all. Munting them 14 inches to center of driver off of the floor seems to be enough. I am curious how many of you have heard this design. All of the downsides I had read about never materialized. Any thoughts?