Wayne Parham Messages: 18991 Registered: January 2001
Illuminati (33rd Degree)
That's right. The only one that has been modeled and measured during the design phase is what you show in picture one, the version that conforms to the plans.
I would expect that the second one might be OK but I haven't measured a speaker built that way so I can't say for sure. I would expect the third and fourth pictures to be configurations that wouldn't work as well. I would expect some ripple in the midbass from those because the standing waves along the vertical will line-up differently.