Some more help needed please. In a three way speaker design, is it normal practice to use drivers that all have the same sensitivity? I am looking to extend the bass response of my speakers. I am considering adding a bass driver with a higher sensitivity, as the bass seems a little quiet in my speakers at the moment. Treble and mid are 91, I have found a bass of 93. Would this overwhelm the upper frequencies? Is this feasible? On a related note, are sealed box design speakers always compromised in the bass response or are there any good examples of speakers that give a an extended low bass?