When you are referencing 4 ohm speakers, the ohm measurement refers to the speaker’s impedance. The speaker’s impedance is a further reference to the restricted electric current that flows through the speaker. When referencing ohms, there are speakers with 4, 8, and 16 ohms. Speakers have amplifiers that deliver a current of electricity that is under pressure. There is some resistance against the pressured current that is called a load – this is measured in ohms. Essentially, all of the latter information boils down to the fact that amps deliver a pressurized current to speakers and the resistance the amps are met with is impedance described in ohms.
What causes the resistance against an amp that provides power to speakers? The quick answer is a voice coil that produces sound. The lower the ohms measurement of impedance produced by a voice coil, the easier it is in the end for amps to power a set of speakers – in fact, the majority of the amplifiers on the market today will have no trouble whatsoever lending power to a decent set of 4 ohm speakers. In the event the ohms are too low or the impedance is not up to par, then the amp is overworked and pressed for more power. It can lead to the quick burn out and potential damage of an amplifier unit.
If you are in the market for 4 ohm speakers for your car, you can try a brand like Visaton with their 2.5 inch full range speaker. These speakers have water resistant properties and an impedance of 4 ohms. The set is great for PA systems with continuous voltage and that play heavy music in the background. As an alternative, you can opt for the 4 ohm audio 8 inch speakers by Power Acoustik Pro. The design of the speaker sports a skull and red roses in the center of the speaker. In terms of color, design, and style, you get a lot of diversity – start shopping for 4 ohm speakers now to see your options.