How many of those non-isolated incidents were "proper" installs. Not disagreeing that the build quality isn't there, but there is a saying... As for what to do? 3 way passive systems blow goats IMO, unless you are diligent about mounting all the drivers really closely together. Putting one in the door is just not a good idea. 2 way systems there are a ton of options dependent on budget and processing and what you'd like. Keeping up is so subjective its hard to tell, it shouldn't be but most people don't care if their midbass rolls off. When I read keeping up its rather simple. If your sub/s are crossed at 50Hz (3dB down) then your midbass from your fronts should be able to output in such a way that at 50Hz they sum to 0dB like the rest of the system. Another way of saying this is that you'd have the same output at 40Hz as you do at 80Hz. Of course, with the amount of sub/s you are running that is pretty much impossible in particular if you are limited to a single driver. Since you have 8 subs you get to compromise. Your compromise will be in midbass. Considering such perhaps a horn and a near pro audio mid is your best choice. Interesting, I woudln't mind compromising. I know aboslutly nothing about horns, I know of Imaige Dynamics and that's about it. Could you perhaps suggest something, or a combo? I don't mind researching but I'd like a good starting point. Processing would be handled via a Sundown Audio 100.4's onboard x-overs. I like the idea of a horn and pa setup, that was my first thought.