Yes, Troy; what you quote in the first post is for the most part "true and accurate". The size of a speaker enclosure affects the bass tuning. It has no effect on the mid-range or treble, and if those drivers are the same in both, the performance above the bass will be the same, assuming that the crossover is the same. If a good sub is handling the low bass, the advantage of a larger enclosure in that area is a moot point.
The part that isn't entirely accurate is the comment in paragraph 3. about bass frequencies being "power hungry". There's no such thing, since power requirements are a function of loudness, not frequency. For example, 40Hz, 400Hz and 4000Hz at 80dB require the same power, and 4000Hz at 90dB requires 10 times the power needed by 40Hz at 80dB. It's true, of course that whatever power does happen to be needed for the bass handled by the sub doesn't have to be supplied by the amplification for the speakers.
