I'm replacing all the speakers in the car. The single active subwoofer in the center enclosure has four wires going in. Is this for left and right channel? I'm replacing the active and passive subs with two Focal 5.25". Should I just use one pair on each Focal? I forgot what the wire colors are. The pairs are most likely easy to spot, right?
I would suspect that this is how the are effectively mono bridging the amplifier. (So you are correct that they are left and right). As long as you are sharing a common ground from both side of a stereo amplifier you can connect both channels to a single speaker to bridge it. Most high end amplifiers have bridging capabilities built in- are you replacing the amplifier? If so it would be better IMO to operate the amp in a bridged mode and wire the new subs in parallel, but you need to make sure that the impedance of the speakers in parallel falls within the mono bridging capabilities if the new amp. If you are not replacing the amp I would first check the impedance of the old subwoofer. I have not replaced mine (yet) so I'm not sure what they put in there although it is seriously lacking. You may be able to separate the wires as left and right as you suggest in your post, but the result will come down to the impedance of the new subs vs. how the original amp was designed
Dual voice coil on the stock sub. If installing two Focal 5.25 (as I did), one pair of wires will go to each speaker as the Focal only has a single voice coil.
