2-Ohm Vs 4-Ohm Subwoofer: Which Is Better? - Vita Audio

2-Ohm Vs 4-Ohm Subwoofer: Which Is Better?

When it comes to home audio systems, subwoofers are an absolute must. They are capable of producing tremendous bass, which is something that regular speakers are unable to achieve.

Subwoofers are so named because they are specially designed to make low frequencies in a sound stream.

2-Ohm Vs 4-Ohm Subwoofer

Bass is a word that refers to the low-frequency sound waves that are created when music is played. For bass fans, a subwoofer is a necessary piece of audio equipment. However, when it comes to sound equipment, many people can get confused by terms such as watts, impedance, and resistance.

If you are big into music and are looking at speakers, you have almost certainly come across the term “ohms” or seen this “” sign on the back of a subwoofer. It will be useful for you to have a better understanding of what resistance is to comprehend it more effectively. 

To put it simply, resistance is the measure of a circuit’s opposition to a passage of electrical current in its most fundamental sense. Ohms are units of measurement for resistance.

Usually, an audio signal is given to a subwoofer in the form of an electric current from a head unit or an amplifier. Audio signal resistance is something they are capable of withstanding to a certain extent. 

The resistance ratings for the majority of subwoofers available today are either 2 or 4 ohms. It would be good to know which subwoofer would give the best bass sound for your home system, even if your stereo or amplifier is compatible with either a 2 or 4-ohm sub. 

So, let’s take a look at what each resistance rating in a subwoofer means, and also where you can buy these subwoofers.

2-ohm Subwoofer

Rockford Fosgate R2D2-10 Prime 10” R2 2-Ohm DVC Subwoofer - 250 Watts RMS / 500 Watts Peak

A subwoofer that is labeled as 2 ohm means that its resistance is the same as 2 ohms. When it comes to resistance ratings, a 2-ohm rating is on the low end of the range, meaning that it does not have a large amount of resistance in its circuit. 

Because of this, a power amplifier is capable of supplying it with increased power while encountering less resistance. In part because of the low resistance, the subwoofer will be substantially louder. In exchange for its low resistance, it requires more power, resulting in diminished bass quality.

Rockford Fosgate R2D2-10 Prime 10” R2 2-Ohm DVC Subwoofer - 250 Watts RMS / 500 Watts Peak
  • Car Audio Fanatics wanting big bass can rely on the Rockford Fosgate Prime R2D2-10 Dual Voice Coil Subwoofer
  • This 10" Prime Subwoofer rocks 250 Watts RMS / 500 Watts Max power handling and the 2-ohm dual voice coils provide awesome installation flexibility
  • The mica injected polypropylene cone, and their stamp-cast baskets with spider venting - typically reserved for more expensive models - keeps the motor running cool while pumping out the bass
  • These R2 subwoofers are optimized for sealed and vented enclosures with a required mounting depth of 4.319 inches and a cutout diameter of 9.125 inches
  • Famous Rockford Fosgate build quality with a full 1-year warranty when purchased from an authorized Rockford Fosgate reseller

4-ohm Subwoofer

Rockford Fosgate P3D4-12 Punch P3 DVC 4-Ohm 12-Inch 600-Watt RMS 1200-Watt Peak Subwoofer

I

It is more difficult to use a subwoofer that has a resistance rating of 4 ohms than a subwoofer with a lower resistance rating. As a result of its high resistance, it generates less noise than other types of materials. This does not generate a significant amount of low-end power. 

When coupled to an amplifier, it becomes high resistance though, meaning that it consumes less power. The sound is also more compact, which means that even if the bass is less powerful, the whole experience is of greater quality.

Rockford Fosgate P3D4-12 Punch P3 DVC 4-Ohm 12-Inch 600-Watt RMS 1200-Watt Peak Subwoofer
  • The P3 Series is Rockford Fosgate’s best performing Punch subwoofer delivering reference quality bass in our most popular models
  • The Punch P3D4-12 is a 12” 4-Ohm DVC (dual voice coil) subwoofer with 600 Watts RMS / 1200 Watts Max power handling and custom 10-AWG nickel plated push terminals
  • Featuring anodized aluminum cones and dustcaps, with a unique spider venting design to keep the motor cooler and a new hybrid stamp-cast basket providing super strength while minimizing weight and resonance
  • Best used in standard sealed or vented enclosures {Sealed (Vb): 1.02 cu. ft. (28.8 Liters) / Vented (Vb): 1.79 cu. ft. (50.6 Liters) / Mounting Depth: 6.66 in. (169.3 mm) / Cutout Diameter: 11.25 in. (285 mm)
  • Famous Rockford Fosgate build quality with a full 1-year warranty when purchased from an authorized Rockford Fosgate reseller

Multiple Subwoofers

Choosing the type of wiring for your subwoofers can affect the resistance of your subwoofers if you want to use several speakers in your home. Subwoofers can be wired in either a series or a parallel arrangement, depending on their size. 

It is the process of connecting subwoofers one after another, with the negative terminal of one sub connected to the positive wire of the subsequent sub, which is referred to as “series wiring.” 

Connect the negative and positive terminals on one subwoofer to the terminals of the other sub, which is known as parallel wiring. 

When you connect the subwoofers in series, the resistance of the system will be higher than it would be otherwise. 

Think of it this way, if you connect two subwoofers in series, each with a resistance of two ohms, the entire resistance will be equal to the sum of their resistances, which is to say 2+2, providing a total resistance of four ohms in total. 

On the other hand, subwoofers linked in parallel have a total resistance equal to the resistance of one subwoofer multiplied by the number of subwoofers connected in parallel. 

For example, if you connect two subwoofers in series, each with a resistance of 2 ohms, the entire resistance will be 2/2, resulting in a total resistance of one ohm. So, connecting additional subwoofers in series results in a reduction in total resistance.

Dual Voice Coils

Even though the vast majority of subwoofers are supplied with a single voice coil, some are fitted with two voice coils for enhanced bass performance. To achieve a dual voice coil, each voice coil must have a resistance of either 2 or 4 Ohms, depending on the type of subwoofer that is being employed.

Because the type of wire you use to connect the dual voice coil subwoofer to the amplifier will affect the overall resistance of the dual voice coil subwoofer, it is important to pick carefully when selecting wire.

For example, in the case of a twin voice coil subwoofer with a resistance of 4 ohms on each coil, you have the option of wiring it in series to get a greater overall resistance of 4+4 (8 ohms) or wiring it in parallel to achieve a lower overall resistance of 4/2. (1 ohm).

What’s Better – 2 Ohm Or 4 Ohm?

Generally speaking, both options are pretty good. The sort of bass you’re looking for will determine which of the two possibilities you’ll choose. At a moderate volume, a four-ohm subwoofer provides the best sound quality as well as the most bass for the most bass.

In addition, you’ll need to connect many subwoofers in series to get higher resistance and better bass quality.

If you want the most powerful bass possible, a 2-ohm amplifier may be better for you. If you have multiple subwoofers, connect them in series to minimize resistance and enhance loudness.

Summary

Getting the sort of bass you want in your home is not as straightforward as simply attaching any subwoofer. There are plenty of other factors to consider. The resistance of the subwoofer affects the volume and quality of the bass it generates.

Additionally, it determines how much power the subwoofer requires from the home’s amplifier or head unit. 

A 2-ohm subwoofer uses less power from the amplifier and delivers greater bass. A 4-ohm subwoofer, uses more power from the amplifier and delivers less loudness but better-quality bass. As a result, choose your bass based on the type you prefer.

If you enjoyed this article, you might enjoy our post on ‘Why Does My Subwoofer Make A Popping Noise?‘.

Jacob Stable
Latest posts by Jacob Stable (see all)