So just so's you know, there is no connection whatsoever between the
diameter 12" and the
frequency range of guitar, other than kind of a coincidence in that some of the bigger guitar combos use 12's. There are lots of things that affect the frequency response of a speaker cab, such as size, shape, and porting
of the box, and the specific model of speaker used; and all of those qualities are WAY more important than diameter.
In fact what's funny is bassists usually get stuck on the idea that bigger diameter = deeper lows and less highs, and you've got the reverse idea.
What you really want to do is find speaker cabs that are actually claimed to be relevant to your specific goals.
