Originally Posted by frankie2075
You mean the ports being to close to eachother or being to close to back wall? And ik to close to back wall will lower the tuning. But thats the same case if they are to close to each other?
LTD touched on what I am referring to - port A bleeds into port B at the exits.
If they were spaced 12" apart, there would be no interaction but as they're moved closer together, their interaction starts to effect the overall tuning point (lower as they get closer). The wave cannot propogate out freely, but instead there's clashing with one another more and more as the ports get closer and closer.
But how much of an effect will it have? As LTD points out, there's no conclusive data. However, if a person did a little trial and error with port tube lengths, they could build the box they way they want, put in their ports and test. If the tuning point is too low, cut the ports down till you get the tuning point you want. Flare the ports and you should still be within <1hz of your tested tuning point.