I'm NOT a stereo expert, I know there are people on this board that can advise you better and go with their advice it sound better than mine.
You wire multiple speaker to one output by using a cross-over, i.e. it splits up the signal so the power goes to alternating speaker according to the frequency.
So, if the front has a speaker and tweeter, you'd wire them in parrallel and have a crossover on each speaker, that splits up the signal to go to each speaker appropraitely. Crossovers can be expensive.
BUT, a cheap way to do this and get away with it, is to just put a capacitor in series with the tweeter, the rating of the capacitor would determine the frequency range it will pass power to the tweeter. The capacitor will act like a cheap crossover for the tweeter. The regular speaker wouldn't have a crossover, but if it doesn't have a tweeter, its NOT going to use much of the high freq energy from the signal anyway and you can get away with NOT using a crossover on it.
Wiring more than one speaker in parrallel will drop the total impedance of the circuit. That can cause the impedance mismatch that everyone was talking about in the other thread.
BUT, if you wire tweeters in parrallel with regular speakers, and use a capacitor to block the low signal to the tweeter, then everything below that frequency will be the impendance of just the one speaker.
I think the Higher freqencies don't have as low an impedance as the total rating anyway, and NOT much energy gets drawn buy having having a tweeter in parrallel and blocked just for higher frequencies. I.E. no worries about clipping, blowing speakers or underdriving speakers at the high frequencies, its the low freqs to worry about. I could be wrong on that, but that is the way I wired up aftermarket on another vehicle I own and never had a problem.
Last edited by Mongo; 12-21-2010 at 10:23 AM.