Alright, pictures make everything so much easier to understand.
Would something like this work? I should be able to control the level of each type of speaker individually. I still wont have anything for time alignment, but that will come later.

Thousands of dollars worth of AutoDesk software on this laptop and I still used MS Paint.
Amps are:
Viper Audio d600.1 - 425w RMSX1 @ 2ohms.
Kenwood Excelon KAC-X541 - 88w RMS X4 @ 4ohms.
Deck
Blaupunkt Pasadena with it's speaker level outputs plug removed. The sign that says you have arrived.

It also has a built-in parametric EQ too, so I can djust the sound a bit.