I was wondering if anyone had tried building a single speaker cabinet that covered the full sound spectrum, say 20hz-20khz at least reasonably well. The idea popped into my head to, for example, build a box that had a low end component somewhat like the JTR growler bass horn, then possibly some sort of horn loaded midrange driver and a high frequency driver, or even a 4-way box, with a low, low mid, high mid, and high driver. I suspect that there is some principle of physics that would make this impossible, and since I know nothing about speaker design I don't really know how this would work out (I do know you'd probably have to time align the components, especially with a horn loaded sub in the bottom), but it might be rather convenient if something like this could be built. I know I have seen boxes with a vented 18 in the bottom, a 12" or 10" midrange, and a 2 or 3" horn, but I don't know that the single 18" really does much in those boxes (I KNOW not in their particular amp configuration, but even then I don't know that they would run all that strong). Anyway, just wondering if anyone had tried doing this, or has reasons why it's not possible.
-Dan