Can the original 4-ohm speaker be replaced with a 2-ohm one?
2 Answers
The original 4-ohm speaker can be replaced with a 2-ohm one. Here is an introduction to car speakers: 1. Working principle: The car electric horn produces sound through the vibration of a metal diaphragm. The car electric horn consists of an iron core, a magnetic coil, contacts, an armature, a diaphragm, etc. When the driver presses the horn switch, current flows through the contacts to the coil, which generates magnetic force to pull down the armature, forcing the diaphragm to move. The movement of the armature causes the contacts to open, interrupting the current. The magnetic force of the coil disappears, and the diaphragm, along with the armature, returns to its original position under its own elasticity and the action of the spring plate. The contacts close the circuit again, allowing current to flow through the contacts to the coil, generating magnetic force and repeating the above action. This cycle continues, causing the diaphragm to vibrate continuously and produce sound. 2. Different types: Car horns are divided into air horns and electric horns based on the sound power; they are classified into cylindrical, spiral, and basin shapes based on their appearance; and they are categorized into high-pitched horns and low-pitched horns based on the sound frequency.
Regarding the issue of replacing the original 4-ohm speakers with 2-ohm ones, I often encounter this during car repairs and think it's better to be cautious. Because the car audio system is specifically designed for the original speakers, the amplifier's output power and impedance matching are very strict. Switching to a lower 2-ohm impedance will reduce the amplifier's load by half, causing a sharp increase in current. Over time, this can lead to the amplifier overheating or even burning out, much like forcing a small engine into a large car. I've helped many car owners deal with similar failures, and the cost of repairing the amplifier far exceeds the price of new speakers, not to mention the potential damage to other circuits. I recommend checking the owner's manual or the amplifier's label, as most factory systems only support a fixed impedance. If you really want to improve sound quality, it's safer and more cost-effective to directly replace them with high-quality 4-ohm speakers or upgrade the entire audio system. When it comes to modifications in a car, safety should always come first.
