There is a line level circuit board that you can insert between the LCD-2 and your amp that brings up the mids (or any area you want changed) on pre-Fazor cans. There is one guy in Europe and one guy in USA that makes them custom to your frequency response and it is different to parametric EQ which is supposed to have more pronounced knock-on effects. Therefore you can keep your sub/bass intact and focus on the areas you want to change in mids/treble etc.
You can fix an underpowered car by modding the engine... it doesn't mean the car is better, only that the upgrades worked. Just my view, YMMV. 'd love to hear about these boards, if you have more info.