I think I blew a driver (maybe two or three) last night. I am positive that bridging the CA9 is what lead to this......from now on I will run it non-bridged. Now, I have a distorted sound coming from what I thought was the mid-driver or possibly the tweeter. To my surprise, I pulled the grill off the cab and three out of the four drivers are slightly creased, some are worse than the others. I disconnected the bulb tweeter circuit and totally removed the mid-driver. At this point, I am 90% certain I have some speaker damage. This has happened once before with a DB728. I spent about $300 to replace all of the drivers. I really do not feel like spending that kind of cash again, although at this point I have to. I, at a minimum, need to get the cab operational. The problem I am having is that I really dig the sound of this cab. Nothing compares to the massive-tight bottom end of this cab, nothing!!!! But, I pay the price for the tone in efficiency However, money doesn't go on trees and I can not afford to replace drivers all of the time, so......This leads me to my question........ Should I ditch the B4 and move on to something with a more efficient design, like maybe a Dr. Bass or Accugroove cab -or- get another B2 or B4 for more volume. Maybe adding another cab will help keep my fingers off the gain knob What do you guys think???