hi CECAA850....i really didnt get wut u meant in ur reply! sorry, its kinda woolly up there..
wut i feel is this (.... n its just my imagination! ) -
for ported bass-reflex subs, the actual effect comes from the port (i say so, coz i hav seen subs with speaker drivers inside the enclosure, with only the port opening outside!)
n from wut i hav learnt in these forums -
1. the port uses the air driven by the 'backward' movement of the driver
2. a in-out phase switch inverts the driver movement.
so where the driver would normally move out, itll move in; when the phase is changed by 180° for the same signal....thus changing the direction of bass comin from a bass-reflex sub (in my case, opposite directions, since the ports r at the rear....)
now, in my speaker setup, the sub drivers face a hollow wooden cabinet n the ports face a solid concrete wall....did this setup aid in improvin bass on changin phase from 'in' to 'out'??? lemme know....