Dumb idea: if the cockpit speakers are mounted with their ass end pointing into the aft cabin(s), you're now feeding both areas, yes? You might want additional tweeters to help put enough treble into the aft cabins.
Originally Posted by Patrick_DeepPlaya
I also want to be able to turn on\off the cockpit speakers or the aft cabin speakers so that I can have all four rear speakers or just one set of them on.
I've done this before.
If an amp can handle 4-ohm speakers, it will also handle an 8-ohm load (two 4 ohm speakers in series)
with no problems, other than the fact that each speaker will only get about half the level. The front-back balance will help balance out the sound from every speaker.
So - each of the L and R rear channel loads will consist of one aft-cabin speaker in series with one cockpit speaker. Like this, the amp sees an 8 ohm load and both the aft cabin and cockpit speakers will work.
Now if you want to kill the cockpit speakers, short them out, leaving just the aft cabin speakers receiving drive. Similarly, if you want just cockpit speakers, short out the aft cabin speakers.
All of the above can be achieved with a double-pole double-throw center-off toggle switch. At the center-off position, both speaker sets are on; throw the switch one way and you short out the cockpit speakers, throw the other way and you short out the aft cabin speakers.
I'm away from where i can easily do a schematic, but i hope the above description will get the idea across.