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1-Ohm vs 2-Ohm Subwoofers [EXPLAINED]

1-Ohm vs 2-Ohm [Main Differences]

When a subwoofer has low electrical resistance, it makes our final output louder. So, simply put, your 1-ohm subs can be louder than the 2-ohm models. But, the quality of the final output is going to be lower because it will take it a lot more power.

Which One Sounds Better?

Although it’ll be hard to tell the difference for most listeners, 2-ohm car subwoofers sound better than 1-ohm as there’s more resistance and therefore, a cleaner output.

Ohm is basically the measurement of the amount of resistance to the flow of electricity. The speaker typically offers this resistance and it impacts the quality of output sound.

If you look at the sub specifications, you will notice that as the wattage increases, the ohms decrease. So, with an increase in the power source, the resistance comes down which means you must balance the resistance and the impedance to keep the circuits safe.

1 ohm means there is hardly any resistance. This also means the subwoofer will be louder. But it means more power consumption and lower quality of sound.

You must also keep in mind that good output depends on the amount of power the sub gets. The RMS rating of the amplifier must match that of the peak rating of the subs.

Otherwise, the amp gives out distorted sound and also damages the circuitry of the sub. Overpowering the sub just a little, on the other hand, is not a bad idea because subs are capable of handling a little extra beyond the peak rating.

What Hits Harder?

1-ohm subwoofers offer less resistance as compared to a 2-ohm subwoofer and therefore hit harder.

If you reduce the impedance, you can increase the power. Otherwise, the output is sloppy and that is called the damping factor. With an increase in power, you will notice that the cone of the subwoofer moves back and forth quite quickly. And if the impedance drops, this momentum is difficult to control.

If you want moderate-level output in a small car, you can get a sub with an RMS rating under 250 watts. You can match it with an appropriate amp which can give as much power to the sub as it can handle.

How Do You Wire a 2-Ohm Sub to 1-Ohm?

About wiring the subs. You can do so through series wiring or parallel wiring. Parallel wiring is when you match the positive terminals with positive and negative with negative.

Series wiring is when you connect the positives to negatives to make the circuit. Now, these are two ways of routing your speaker wires to the subwoofers. The idea is to manage overall impedance which in this case should be 1 ohm. Here’s one way to do it.

  • First, get a monoblock amplifier to stabilize at 1 ohm.
  • Connect the positive terminals of the amplifier to the positive terminal of the subwoofer. If you are doing this with two subs, connect the positive of the first sub to the positive of the second sub using another wire.
  • Then, wire the negative terminal of the amplifier to the negative of the subwoofer. If you have a second subwoofer, connect the negative of the first sub to the negative of the second sub using a second wire.
  • Check the readings with a meter to see if the final impedance is 1 ohm.

How to Wire Dual 2-Ohm Subs to 1-Ohm?

When you are done with the wiring, you will have a final impedance of 1 ohm. It is important to get this right so that the sub-system can be properly installed in the vehicle. Here is a step-by-step guide.

  • Get two jumper leads for one for positive and negative each. Let’s say you get blue for positive and grey for negative.
  • If you’re connecting them in parallel, connect the grey wire to the negative voice coil one and branch it towards voice coil number 2.
  • Take the blue jumper and connect it to the positive of voice coil one and branch it to the positive of voice coil number 2.
  • Take another set of jumper cables and connect the positive to the positive of the jumper attached to the sub. Do the same with the negatives too.

See the video for a visual explanation.

Check the readings with a meter and the final impedance should be 1 ohm.

Vincent Talbot