Quote:

would a bottom firing sub have the same room harmonics as a front firing sub ?
would a sub with a 8" woofer have the same room harmonics as a sub with a 12" woofer ?
maybe the 'ease of placement' is dependent on these and/or other variables ?


That's a broad question.
Sound is about air movement. The biggest variables therefore are the driver size, cabinet size and location to walls in distance units.
Think of the pebble in the pond when dealing with low frequency sounds. They are non-directional to the ear because of their longer wavelength.

Uh, what was the question again?
I'm off track.
Must be the glass of luscious Mondavi.

"Those who preach the myths of audio are ignorant of truth."