Woofer loading and differing distance to port, probably a quick and easy question :)

[GammaRadiation 10+ year member]

Also to answer the question pertaining to the picture, my intuition would say greater distance but unequal. Why? Well the first assumption in building most smaller volume ported enclosures is that the wavelength of the resonance is much greater than the distances in the enclosure. That is, pressure is nearly equal throughout the volume of the enclosure. When you think about it, a 40Hz sound wave has an 8.5m wavelength. You need a box over 2m wide/long/high to generate any significant resonance. On top of that, Even a 15" woofer is comparatively small. So a 15" difference in distance can be assumed to have nearly the same phase. You mostly just dont want a port opening being right by either of the cones, especially on axis.