Re: Sub placement
It is ALL about freq and wavelength. You will gain nothing by having the ports close together (at the freq they are operating).
But you may have some issues with the woofers (depending on how high they are operated-the actual spacing etc) being further apart.
Since the ports "operate" at a lower freq-they can be further apart and still couple. As you go up in freq-things have to get closer and closer together to couple properly.
As you go lower-they can be further apart and couple just fine. Think in terms of 1/4 wavelength at the lowest freq of interest-in order to get good coupling.
Think of it like this-1000hz (1KHz) has a wavelength of 1.13' so 1/4 of that is .28' or less than 3.5". When drivers are spaced more than that-at that freq-"things" start to happen.
So lets go up an octave-to only 2Khz. Now devices have to be about 1.5" apart (or less_) to couple.
So you can easily see where the loss of quality/detail comes from multiple devices.
