Originally Posted by cinemascope
2-3x the port diameter is the minimum distance to allow the airflow in and out of the port to keep from affecting the port tuning. That really means nothing to boundary effect.
There will almost undoubtedly be someone to say that it doesn't matter where the ports are, the boundary effects are the same no matter what. I think that this thinking is book smart, but overlooking reality.
The port is producing low frequency output to augment what is coiming from the cone, and close proximity to a boundary WILL enhance the output of the port. If you have a flexible EQ, you can tailor out the uneven response caused by the boundary effect.
boundaries affect all speakers not just ported...so it doesnt matter if you stick a ported speaker near a wall/corner or a sealed speaker....the boundaries excite a certain set of low frequencies in either case....unless of course the sealed speaker is not a full range speaker...
also, just because a speaker is ported, doesnt mean the listener is not going to be using a sub with it...all my speakers are ported...and i also use a sub.
if you are limiting yourself to sealed speakers soley on that argument you are missing out on a lot of fine speakers....and i think you are generalizing by making such a blanket statement...there are a lot of other things that need to be considered.