Here's another thing to chew on:
"The main problem with quantifying 'fast' versus 'slow' bass is that the cues that our ear/brain use to make that determination don't come from the frequencies below 80 Hz, they come from the frequencies from roughly 80 to 500Hz. So yes, transient response is very important, but not the transient response of the subs, but rather the transient response of the midbasses. Earl Geddes would have a field day over this one."
A lot of what is 'commonly known' about subs is incorrect.