As you shop for earphones or headphones, you may run into numbers such as 16Ω, 32Ω, or 80Ω. This is referred to as impedance rating, and if you are not conversant with the vocabulary of the audio world, it may seem a bit complex.
Is there any relationship between the value in ohms and better quality of sound? Does one require an amplifier for his earphones to function? Let us find out.
What Does the Ohms Rating Mean?
The Ohms rating tells you how much resistance your wired earphones have to the electrical signal coming from your device. It is measured in Ohms (Ω).
Think of it as how much effort your phone, laptop, or other device needs to put in to drive your earphones. Lower-impedance earphones generally need less power, while higher-impedance headphones can need more.
For everyday earphones, ratings such as 16Ω or 32Ω are quite common and are designed to work comfortably with devices like smartphones, laptops, and tablets.
Does Higher Impedance Mean Better Sound?
However, that is not always the case.
Just because the earphones have high Ohms, does not guarantee better sound quality. Sound quality depends on a variety of things like driver quality, tuning, sensitivity, quality of source, etc.
For instance, 16Ω earphones when well-designed, can give better sound than high Ohm earphones which are not designed properly.
So do not go for earphones just because their Ohm is high.
Do You Need an Amplifier?
That’s when things start getting really interesting.
Normal low-impedance earphones tend to be made to use in conjunction with mobile phones, laptops, tablets, and all sorts of similar gadgets without any additional hardware. Higher impedance headphones, on the other hand, might require some extra power to reach a good sound level. And if you hear your headphones playing at an unusual low volume despite increasing the volume level, there might not be enough power being delivered from the gadget.
An amplifier can fix this problem by providing this extra power.
What Should You Look For When Buying Earphones?
Rather than being solely concerned with the Ohm value, consider the big picture. Take into account the impedance, sensitivity, driver size, frequency range, and device that will be used with the headphones.
If you mostly consume music, podcasts, and video content from your smartphone, buying earphones that can handle such devices easily is a better choice. You won’t have to worry about any additional gadgets just to enjoy your daily listening session.
Conclusion
Ohms is certainly a good measurement to consider, but it shouldn’t be your sole basis for choosing earphones. Not only is a high measurement no guarantee of better quality sound, but regular consumer earphones do not need an amplifier anyway.
In other words, pick the right earphones for your particular device and listening preferences. Sound quality is all about compatibility and integration, not about one single measurement.
