What is the Difference between 2 Ohm, 4 Ohm, and 1 Ohm?
Before making a distinction between 2 ohm, 4 ohm, and 1 ohm, it is crucial to first understand what exactly is an ohm and how it applies to car stereo receivers. In the simplest of terms, an ohm is the amount of resistance that an object or an instrument offers to the flow of electricity. So, a resistor will feature a certain amount of resistance, which can be measured in Ohms. A speaker is essentially a resistor. Therefore, when a speaker is given a specific ohm rating, then it refers to the resistance offered by the device to the flow of electricity through it. The ‘ohm’ specification on the speaker is important to understand because it can affect the quality of sound produced.
Let’s take an example. All the speakers come with certain ohm specifications, which look something like 350W at 8 Ohms. The rule to remember is that the watts add up and the Ohms go down. Confused? It will become clearer in a minute.
Let’s say there are four 350W 8 ohm speakers. When one of these speakers is connected to an amplifier, it will be called as running 350W at 8 ohm load. Plug in the next speaker now, then it will become a 700W 4 ohm load. Adding the third speaker makes it 1050 W at ~3 Ohm and the fourth speaker will make the system specification 1400W at 2 ohm. The power source is pushing the 1400W metric, but the resistance is being pushed back by 2 ohms. At this stage, it really depends on the specifications of the speaker, whether or not it will be able to take the load, s it is important to do the right matching of resistance or impedance in order to keep the equipment safe.
How Do They Differ?
As the impedance increases, the more the resistance increases from 1 ohm to 2 ohms to 4 ohms. Another important point to note here is that as the resistance increases, it inhibits the flow of the electricity more strongly. It literally safeguards the circuitry in the speakers. In other words, when exposed to the same amount of power, a 1 ohm speaker may blow out easily, while a 4 ohm speaker can take the load effortlessly. Another obvious difference is that as the ohm ’age’ increases, the speakers can be used for more heavy duty use. Consequently, 1 ohm speakers can be used for only light use. The speakers with higher ohms can also be run for longer than those at the lower end of the spectrum.
If you are connecting the speakers in series, then their impedance gets added and if they are connected in parallel, it is halved. The most important thing while hooking up a speaker to an amplifier is to know the upper limits of the resistance, below which the amplifier remains stable. If the speaker of the right impedance is not connected to the amplifier, it may burn it out. Hooking up the right amplifier to the right speaker is very important. The speakers ohm specs help you do this.