What we discussed was putting front and rear speakers together to two channels...i.e., you still have left and right, but no fade.

Now, if I'm reading this right, you have 4 ohm front speakers, and 2 ohm rears. This means the front right speaker is 4 ohm the front left speaker is 4 ohm, the rear right speaker is 2 ohm, and the rear left speaker is 2 ohm...this seems over simplistic, but I want to make sure we are all on the same page.

Now, you want to hook front right and rear right to the right channel on your two channel amp. If you wire in parallel, this may not work, as it would give you 1 1/3 ohms, which your amp is probably not stable to. You can go series, but that would be 6 ohms.

I really don't understand how your speakers will 'let you go 2 ohms'...speakers don't let you go with an impedance, they represent an impedance to your amp. You also don't run 4 ohms or 2 ohms to your speakers, you wire them to show 4 ohms or 2 ohms to your amps. I think your terminology is off.

If you actually can chose between 4 ohms and 2 ohms (?), chose 4, run them in parallel with the other 4 ohm speakers, and get two ohms per channel.

I still think something is missing here...

Toby