Skip to content


Close this search box.

4 Ohm vs 8 Ohm Speakers – What’s the difference?

In order to achieve the same loudness, a 4-ohm speaker requires more strength from an additional amplifier power than an 8-ohm speaker. The relationship between voltage and resistance in the electronic loop that travels through is what causes this.

You must be aware that speaker impedance, which is essentially the same as resistance, is what is being discussed when deciding whether to choose 4 ohms or 8 ohms. Different impedance levels (4, 6, 8, and 16) are offered by audio technology components, and they combine with the amplifier’s speaker impedance to ensure that your sound system operates as intended.

What is speaker impedance?

Impedance is the resistance an electrical current encounters when it is connected across the terminals of a speaker or other component. Less power will be lost during transmission with a lower impedance rating, but more amplifier power may be required to achieve the desired volume levels.

The impedance rating of a speaker ranges from a few ohms to thousands of kilohms. For a given volume level, a lower impedance requires more power, and vice versa. The impedance of a typical home speaker will be between 4 and 8 ohms (or multiples thereof).

Why is speaker impedance important for speakers?

Due to transmission losses, speakers with mismatched impedances will not produce their best audio. It won’t operate well, just like if you were using a hose with less pressure than its maximum and more draught.

Impedance rating of a speaker has an impact on output, or volume, as well as input signal level. An amplifier may produce distortion if the speakers’ impedance levels are too low for it, and this distortion may get worse as the volume is increased due to the amp drawing too much current. On the other hand, sustained notes may be clipped by insufficient voltage (signal) levels coming out of the amp if they are too high for the amp.

Impedance matching, such as using a low-impedance speaker and a high-wattage amplifier, is always recommended when connecting two components in this fashion to avoid distortion. Speaker models and specs vary between speaker brands.

4 ohm vs 8 ohm speakers – What’s the difference?

An amplifier must supply greater power to a 4-ohm speaker. But is it better? Yes, as it is thought to be a power-starved component.

Yes, it is better because running 4 ohms accurately frequently depends on the speaker’s impedance. Modern speakers typically choose 4 ohms, and the brands sell those speakers for premium costs. At high pitches and loudness, a 4-ohm offers a superb sound boost that is far more natural and free of sound distortion.

Additionally, 4-ohm isn’t necessarily better because the home audio system frequently experiences impedance problems. However, you should also consider sensitivity because impedance alone does not define a speaker’s power.

An 8-ohm impedance on the opposing side receives less power from the amplifier. High resistance yields an 8-ohm, and the more resistant the impedance, the less power is produced. Professionals favor high impedance because it is more precise.

Therefore, a 4 ohm impedance is typically considered to be the winner.

4 ohm vs 8 ohm speakers – Which one is better?

Better sound should be produced by speakers whose impedance is larger than or equal to that of the amplifier. Less power is wasted during transmission when a speaker has a higher impedance rating, which allows for more power to be utilised for loudness and low-frequency response (bass).

A speaker with a lower impedance rating will need an amplifier with a lower voltage output capability. As long as their wattage ratings are matched, speakers with greater impedances may require more nominal power. Without a compatible amplifier, a 4-ohm speaker will cause distortion, sound bad, and maybe even harm the speaker, though most of them have some kind of safeguard against this. A more affordable amp can be avoided if you use an 8-ohm speaker if you’re on a tight budget because they won’t need as much power.