Originally Posted by BIGmouthinDC
Can you elaborate this statement? I thought mid bass is 50-250 but I'm just learning the jargon and concepts you guys use in this room, so straighten me out.
first, let's look at the term mid-bass. it does not mean middle of the bass. it means the intersection of the midrange, which is roughly 120hz to 1200hz, and the bass, which is is roughly 35hz to 120hz. (i'd call below 35hz sub-bass, but now we are splitting hairs) a "mid-bass driver" covers some overlap of this range. a good one, covers it at high spl.
as a result of lack of mid bass spl, many add "mid bass modules" to their systems. generally, such are meant to provide more impact in the range from about 50-150hz. the range that we often associate with "impact" of kick drums, bass guitars, synths, etc.
the four pi's, with sufficient power, should be fine from 50hz up. you should be pushing 125db max, per speaker, in room, 130db total per pair. that will make even my ears bleed.
many have found that their home-subwoofers can't hit such high levels even though they dig deep down low. as a result, some add mid-bass modules, aka mbm's, in order to make up for deficient mains.
there are lots of solutions. we all have different requirements. optimizing is different for each person, but this does not mean that there is no optimal for each of us. someday we will have the set of performance variables that dictate system specifications...we are not quite there yet. we are pretty close...but not quite there.