Hey there guys..

I have installed a pioneer cd headunit which has two rca's into my EF fairmont along

a mono amp/sub and the ford factory alpine? 4 ch amp.

Now one rca is going to the monoblock and the other rca is going to the 4 ch amp
and using two splitters to allow for the four speakers..

Only problem is that channel 1 and 2 work but not 3 or 4. I can't find any switch to change from 2-4channel on the unit and I have tried swapping the rca's around and the speaker cables between channels but no joy..Can I simply connect two speakers to one channel for the time being?

Thanks in advance..