if i'm looking for an 8" midbass, should i stick to the ones that have a frequency range that r low like 50-500 (just made up numbers) or will an 8" that plays up into the thousands (more of a midrange) do just as well? any other specs to look for for a midbass speaker? i think qts should be high, correct?to work in the doors. or should it be low like for small sealed boxes?assuming the door is completely sealed for the low qts.