Audio Systems: Please explain ohms, dual voice coils, dual voice coil

Question
on my amp however, 2 channels are designed for subwoofers the others midrange. if i was to bridge the channels to get more watts to the speakers how then would i connect the speakers? if i was to bridge the channels, then supply each coil with the bridged power would that be effiecient or is there a better way?
-------------------------------------------
The text above is a follow-up to ...

-----Question-----
I have a 1200w x 4 channel amp. I have two dual voice coil subwoofers (4 ohms each sub). I would like to get the best sound of of the system what would be the best wiring for them and a diagram if possible. please explain the theory on ohm the more ohms the better or vice versa?
-----Answer-----
Impedance (in ohms) is not a quality factor; it is a specification used for best matching to the power amplifier.

If you have a dual voice coil speaker you are best to drive it using a stereo amplifier with each output of the amp connected to one voice coil.  If you have two speakers, each with dual voice coils you should have two stereo amplifiers such that each of the 4 amp outputs can connect to one of the 4 voice coils.

In your case, since you have a 4 channel amp you are in heaven!  Just connect each amp output to one of 4 voice coils on the two speakers.  Just like you would think.  No diagram necessary for this! Don't worry about the impedance; everthing will be okey. (and we can't send diagrams over allexperts; only text).

C


Answer
No. You will get more power as originally outlined to you.  If you drive the dual voice coils with only one input you are dragging the dead voice coil and it will reduce its efficiency.  

Therefore, I recommend you go as before explained.  Just because the other two channels are marked as mid-range amps does not mean anything in terms of power delivery.  If it is a good amplifier the sections marked midrange will drive the woofer coils just as good as the other amps.

Best wishes,
C