In parallel wiring, the terminals of each subwoofer are connected to the same terminals: positive to positive and negative to negative.Īs opposed to series wiring, parallel wiring actually divides the impedance load, but working it out is a bit more complicated than series wiring.īasically, when the impedances of all the subs are the same, their total impedance is that value divided by the number of voice coils.įor example, 2 x 4-ohm SVC subwoofers wired in parallel have a total impedance of 2 ohm. The other way to wire your subwoofers is to run a parallel wiring circuit, and this is the best way for wiring 2 subs to a mono amp. To work out the total impedance of this Series wiring set up, you need to add the total impedance of your subs, so if you’re wiring 2 x 4-ohm subs to a mono amp, you will have an 8-ohm load. The series wiring set up will run from Amplifier positive (+) to Subwoofer A +, and the Subwoofer A negative (-) to Subwoofer B +, and the Subwoofer B – to Amplifier –, so it all makes a big loop, or as I say like completing the relay. Series wiring is akin to running a relay. You can wire them in a series or parallel circuit, or even a combination of both if you have to, and either way makes sense for certain set ups. Subwoofer Wiring CircuitsĪs already mentioned above, depending on the way you wire your subs, determines the overall impedance of your set up. Neither is better than the other, but a DVC will give you more wiring options, and you’ll be able to configure your impedance load in more ways than you will with a pair of SVC subs. Whereas, if it has 2 sets of terminals it means it’s a DVC. If you’re not sure which type of subwoofers you have, look at the back and if there’s one set of connector terminals (+ -) it is an SVC. They can either have one (Single Voice Coil – SVC), or 2 voice coils, which is known as a Dual Voice Coil ( DVC). Choosing The Right Wiring Set UpĬhoosing the right wiring set up also depends on how many voice coils your subwoofers have. The impedance load of your subwoofers must match what the amplifier can handle, and whether you wire them in a series or parallel wiring circuit, you can either multiply or cut the impedance load. Mismatching the impedance between amplifiers and speakers can damage your equipment, so make sure you get this right before you start.Įvery subwoofer has an impedance rating, but of course you intend to wire 2 subs to the same mono amp, so that extra device has to be taken into account when working out. This is typically measured in ohms, and the amp will supply the amount of power that it detects the subwoofer can handle.Ī lower impedance means that there will be more power flowing from the amplifier, whereas a higher impedance speaker will have less power flowing from the amplifier. Impedance of the subwoofer load helps the amplifier determine how much of a power load the subs can handle. Also, remember if you’re changing the impedance of your subs, the RMS of your amp will change, too. So, if you’re wanting to wire 2 300W subs to a mono amp, your amplifier should be at the very least 600W RMS. For any subwoofers to sound their best, you need an amp that can power them, and this means your amp’s RMS should match or even better exceed the total RMS of your subwoofers. When running any subs and amplifier, it’s important to match the RMS. But before we get going let me explain exactly what you need to know. Whichever way you choose to wire them, remember your amplifier must be able to handle the same impedance load your wiring circuit will produce. Things to Know before Wiring 2 Subs to a Mono Ampīefore thinking about wiring 2 subs to a mono amp you have to know how many voice coils both your subwoofers have, because there are many ways to skin this cat. Then make sure you wire the 2 subs to your mono amp correctly, so you can enjoy that extra umph in your lower frequencies for many moons to come. So, before you start you have to do a bit of math to make sure the amp and subs can work together. There are many configurations, and before you start you have to know the amplifier can handle the total RMS and impedance of both of your subwoofers. However, it’s important to note that a dual subwoofer setup is only functional as long as you wire it correctly, because if it’s not done right, it could end up very costly for you. Running 2 subwoofers isn’t for everyone, of course, but if you really want that extra bass, it will shake the car seat you spend so much time in and turn heads as you drive by.
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