Posted by Wayne Parham on September 08, 2001 at 16:03:17

In Reply to: Port placement in room posted by AudioLapDance on September 08, 2001 at 08:23:04:

There's no difference. The port's being off to one side was initially done because there is more room to put the port there. Aesthetically, I liked having them mirror images but that's the only reason. Having the port inside or outside does nothing to the sound - wavelengths are long so this distance is acoustically small.

One exception is the Pro four Pi with the port beside the tweeter. This makes the tweeter slightly offset left or right of the woofer. In turn, the verital nulls are slightly diagonal rather than directly above and below. That means you'll have slightly better vertical pattern control in the direction of the line between woofer centerline and tweeter centerline. So if you have a sloped or gabled ceiling, I'd probably position the speakers where the line drawn between woofer centerline and tweeter centerline was directed at the lowest point.