Subwoofer Wiring Diagrams


How do I wire up my subwoofer(s) to my amplifier(s)?” Well, that’s actually a really great question! In fact that is one of the most asked questions in the car audio field. This is not surprising however, because Ohms Law is just not something the average person could derive. Sonic Electronix has spent many months creating and perfecting a subwoofer amplifier wiring diagram to take all of the guess work out of configuring your audio system. So, how does it work and why would it help you?

Subwoofers have different impedances (Dual 4 ohm, Single 2 ohm, etc) that change your wiring options when you add or subtract woofers. The final impedance of your subwoofer must match the acceptable impedances of your amplifier, with 4 ohm and 2 ohm being the most common final impedances. Not only do you have to match impedance, you must match wattage as well. It’s best to get the combined total RMS wattage of your subwoofers to match the RMS of your amplifier. If you are still scratching your head, don’t worry about it, that’s why we made this subwoofer wiring guide.

Here is how it works:

  • First: Start off by imputing the number of subwoofers you plan to run to your amplifier. The size of your subwoofer is not important here, however please match the wattage of them combined with your amplifier.
  • Second: Input the voice coil type. Both subwoofers need to have the same voice coil configuration. For example, if it says it is a “Dual Voice Coil (DVC)” subwoofer, and you want to run two subwoofers, they both need to be DVC woofers.
  • Third: Select the impedance that your subwoofer(s) are rated for. For example, if the woofer says “Single 4 Ohm Voice Coil” you would select “4 Ohm” in the wiring tool. If it says “Dual 2 Ohm Voice Coil” you would select “2 Ohm” from the list, even if you are using multiple woofers. Remember, each of your woofers impedance need to be the same.
  • Fourth: Finally, choose the type of amplifier you are hooking up your subwoofer(s) to; monoblock single channel amplifier, 2-channel amplifier, or even a 4-channel amplifier.

Click “View Wiring Options” and sit back and relax! Our car audio wiring diagram tool will do the work for you. If your configuration is compatible, our diagram will show you a graphical representation of how to wire your woofers and amplifier together. Some configurations even allow multiple wiring options, so we will show you all of the different options and allow you to choose which is best for your setup. The ohm rating by the amplifier is what that subwoofer configuration will produce, so make sure that the subwoofer accepts that rating. If it says “8 ohms” next to the amplifier, but the amplifier you plan to use does not have a power rating listed at “8 ohms” then you need a new configuration. Keep trying different configurations until you find the ohm level and RMS power rating that you need to match everything together. At the bottom, all of the most common configurations are listed, so you can feel free to take a look at them simply by clicking on their respective link!

Here is an example that may clear up any loose ends:

-Let’s say you picked up two Kicker 10CVR122 subwoofers and a Kicker 10ZX750.1 amplifier. The subwoofers combined RMS power is 800 watts, that is 400 watts RMS each subwoofer. The amplifier produces 750 watts RMS at 2 ohms final impedance, so need to find subwoofers that when wired properly, produce a 2 ohm load. The RMS ratings match up very closely, so this setup, if we can get the wiring right, will work great! So, go to the wiring tool and type in 2 subwoofers. Now if you look at the description for the kicker subs, it says they are “Dual 2 Ohm” subwoofers. Go back to the tool and type in “Dual VC” for number of voice coils and “2 Ohm” impedance respectively. Almost done! Will this work? Final step input the amplifier type that will be used with these subwoofers. The ZX750.1 is a monoblock, single channel amplifier, so choose “Mono” under the Amp Type in the subwoofer wiring diagram tool. Now click “View Wiring Options”. The picture says “Mono Amplifier @ 2-ohms” which is just what we needed! The amplifier produces 750 watts RMS power at 2 ohms, so this is a perfect setup! The picture will show you how to run your positive and negative wires to your subwoofers and amplifier. Is it that easy? Yes, as a matter of fact it is, and you didn’t even have to do mathematical calculations with Ohms Law. No offense to German physicist Georg Ohm, we just like things to be as simple as possible.

Staff writers at Sonic Electronix are experts in their field. In addition to a complete in-house training program, these experts typically have many years of hands-on experience in their specialty. Some come from car audio installer backgrounds, while others come with extensive retail experience.

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