# Small accessories that solve big problems, Ningfan Acoustic Impedance Rods and Extra Small Headphone Cases

Recently, I bought two new earphone accessories for myself. One of them is relatively rare, but it is quite interesting. Although it is simple, it can solve the big problem that plagues some friends. Let me share it with you.

## Impedance rod

The name of the first accessory is the impedance rod , which is used to increase the impedance of the headphones . Although many friends wish that the earphones have lower impedance and are easier to push, too low impedance and too high sensitivity sometimes cause an unbearable problem- floor noise . Just like the noise we usually get when the radio cannot receive a station, it is not only annoying, but also affects the sound quality and makes the sound of the song muddy. Impedance rods are used to solve this problem.

The workmanship of Ning Fanjia’s impedance stick is relatively good

Simply popularize the impedance: According to the definition of the encyclopedia, the impedance of the earphone is the abbreviation of its AC impedance. Impedance refers to the resistance to alternating current in a circuit with resistance, inductance and capacitance. It is called impedance, and the unit is ohm (Ω). Generally speaking, the smaller the impedance, the easier it is for the earphones to sound and drive. The impedance of the earphone is the abbreviation of its AC impedance, and its size is the sum of the DC resistance of the coil and the inductive reactance of the coil: Z=(R2+02L2)1/2.

In human terms, it is actually the resistance (Ω) we learned in junior high school. It is meaningful to match this parameter with the sensitivity on the earphones. However, generally speaking, earphones with low impedance are more sensitive, and can emit large volumes at low power. Headphones with high impedance are less sensitive and require high power to produce a large volume, which is what audiophiles often say is easy to push but not easy to push.

## Impedance rods have two advantages

One is that it can eliminate the background noise mentioned above, and the other is that it can activate the high-impedance mode of various devices, such as HiFi mobile phone players, small tails and even large power amplifiers , to make the sound more tense. Then how do you know if you have switched to high-impedance mode? A very simple way to check is to check whether the volume has changed before and after. Generally speaking, after plugging in the impedance rod, the volume will decrease because of the high impedance. The volume has not changed or If it becomes larger, there is a high-impedance mode to compensate the volume.

I used Ningfan’s own NA3 for testing, and it is a relatively easy-to-use earphone (especially very light and portable, suitable for the main force, you can see my previous experience). As far as the earphone itself is concerned, the music will be more tense after the impedance bar is added (although the difference can hardly be heard), and the high-impedance mode can be activated with the self-made LG HiFi tail, the sound will be completely different, more energetic and more Nice to hear. Moreover, the small tail and wired earphones are already the worst-hit areas of the background noise on mobile phones and other devices. If the anti-shielding is not done well, there will be a clear background noise. The role of the impedance bar is more obvious. As for the power brought by a few more ohms Consumption is negligible.

Small tail with wired earphones

## Extra Small Headphone Case

Another solution to my big problem is the super small earphone cover.

Most of Ningfanjia’s earphones provide super small earphone sets

There are quite a lot of friends around me with small ear holes, including me, the small earphone sleeves that come with ordinary earphones can’t be plugged in, and some people even have to give up using in-ear earphones, or use Samsung buds live or buds The s2 pro is such that the earphones are not inserted into the ear canal.

And one of the things I like about Ningfanjia headphones is that most of their headphones provide four models of earphone sets, among which there is a super small size, and the workmanship is very good. I tried it on my buds s2 pro, hey, it really fits well, and I feel that there are exclusive optimizations. Later, I asked the manufacturer, and I really thought about active noise reduction for true wireless headphones, so it is also very suitable for true wireless and active noise reduction headphones.

Ningfan Acoustic Super Small Headphone Cover

Now they have also sold this set separately, which is a good replacement for the earphone cover. There are relatively few earphones that come with super small earmuffs on the market, but I found that this super small earphone is a little smaller than Ning Fan’s own super small earphones. And other sizes of earphone sets are also available, ranging from 4.2mm to 13.2mm in diameter (1.3 cm ear holes should be called brain holes…), but the demand may not be as large as the special sizes of super small or extra large.

Various models are available in multiple sizes

As for the impact of different earphone sets on the sound, I don’t think there will be much difference that can be noticed. However, since I use a super small size that is a little smaller than the original one, it can be inserted deeper into the ear canal. places, listening to music may be more full, this can be regarded as an optimization.

I recently bought these two accessories, which basically solved my two problems that affected my experience, which is worth the money. If you have a similar problem and see this dynamic, you can also start to try it, which can really improve the listening experience.