How can I wire two 2ohm dual voice coils and a 4ohm dual voice coil sub together?

I have two 2Ohm dual voice coil subs rated at 500W with another 4Ohm dual voice coil sub rated the same, that I am buying from someone. All in one enclosed box and going to be ran by a 1200W amp. How would I be able to wire them to work efficiently? Also, would it be able to fit perfectly in the trunk of an ’08 Dodge Charger? The box is about 38” in length. I do not have anything to measure. Thank you for whom reads this.

If you try to hook them all in parallel you may have a problem. Your impedance will be less than one ohm. I would hook the two 2s in series. use a single wire from the – of one speaker or black, and hook it to the + of the other 2 ohm speaker, Now treat those like one speaker, and hook the empty – or black on one to the – on the amp or black, Take the empty + or red on the other and hook it to the – or black on the amp (or cross over) Then hook the 4 ohm up to the same terminals as the two 2 ohm speakers on the amp or cross over. The series hook up of the two 2 ohms will make them a 4 ohm load. When you put the 4 ohm in parallel with it you will have a 2 ohm load. To figure out series resistance you just add the ohms. To figure parallel you take the reciprocal of the impedance, or 1 divided by the ohms. then add those together and take the reciprocal of that as your total ohms. Since we made the 2 ohm subs into one 4 ohm assembly we would have 1/4 ohms plus the 1/4 ohms from the 4 ohm sub. Add those two and you get 1/2. the reciprocal of 1/2 is 2, or 2 divided by 1 or 2/1 and is 2 ohms. If we did everything in parallel 1/2 +1/2+1/4= 1 and 1/4 or 5/4. That is point 8 or 0.8 ohms, and not very good for the stereo. Follow those instructions and you shall have a 2 ohm load. I wish I could draw it out, but hopefully I was clear enough. The 2 2 ohms are wired like one larger pair to the amp with a wire from the red on the amp or crossover to the red on one 2 ohm speaker. This is the +. From the black or – on that same speaker go to the + or red on the other 2 ohm speaker. Come off that speaker’s black or – terminal and wire to the – or black on the amp or cross over. Wire the 4 ohm to the same terminals as the two 2 ohm speakers red to red black to black + to + what ever etc.

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