There are even speakers with 11 drivers and EP600 and 800 with no ports. There's also an EP800NME. Soon there will be speakers with digital cross-overs. Oh...and there's the "secret" project they're working on where 1 Watt of power will produce 135dB at 3 feet. I'm afraid your system is so out-of-date, there's no hope of you ever catching up so you may as well just give up now.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated