When I was a child, I had a lot of fun and saw headphones, but I didn’t care. I paid attention to headphones probably after I went to junior high school. In the past, domestic pocket radios were often equipped with headphones. My parents bought radios several times, but after buy

When I was a child, I had a lot of fun and I saw headphones, but I didn’t care. I paid attention to headphones probably after I went to junior high school. In the past, domestic pocket radios were often equipped with headphones. My parents bought radios several times, but after buying them, they never saw them use headphones, so the accessory of headphones belonged to me. Maybe I also got headphones from other channels. Anyway, between 1991 and 1994, I got several headphones, which are also called earbuds.

At that time, I also saw headset and earbuds on tape Walkman, but I didn't care. After I get the

headphones, I usually listen to them for a short period of time and then use them to do various experiments. For example, headphones are modified, headphones are repaired, headphones are expanded in volume experiments, etc. To change the headset, I use the 0.09 enameled wire of the AC contactor , either rewind, or add coil , or change the wire diameter, thicken or thinner. When repairing the headphones, the thread end is broken, so I reconnect it with a soldering iron. Of course, this must be done when I have a soldering iron.

headphones expand the volume experiment. At that time, there was an idle bucket for a restaurant in my room. I took off the shell of the headphones and removed the diaphragm. Using the suction power of its own magnet, I sucked the headphones on the bucket and inserted the headphones on the radio or TV. At this time, my ears were dozens of centimeters away from the bucket, and I could hear the sound. Although this sound was like a mosquito, the volume increased a lot compared to when it was not changed.

Unfortunately, the headphones I changed are still not high-resistance headphones, so I failed to successfully use them to do experiments such as ore machines~ Although the 0.09 enameled wire was already very thin at the beginning. Around 2008, and a few months ago, I modified the white old-fashioned headphones several times. Judging from my changes, if I rewind it with 0.09-like enameled wire, the DC resistance is about ten to dozens of euros, so we can know that the headphones I changed back then, the impedance is only tens of euros. At that time, I thought that all the headphones in the world were the same tone.

html went to technical school in 2094. In 2019, I saw a amplifier board for the recorder and put it in a 20X20CM box. Of course, the box is not big. Apart from the circuit board, I can only hold a speaker. I used it as an amplifier for that box, and it is also stereo. When I need to listen to stereo, I plugged white headphones into two 3.5mm jacks. I saw a radio-loving classmate in the next class who had tape Walkman headphones. I told him that I used old-fashioned white headphones, and he told me that the metal sound of the headphones was too heavy. Later I found a tape Walkman headphone, and after listening, I found that the effect was indeed good, with richer high and lows than white headphones. I started researching ore machines around 2008. Until then, I still thought that the white earphones had a small diaphragm and only needed a very small power to push it. The effect of making ore machines would definitely be good.

Later I saw that there were headphones like Title on the Internet (I’ve seen them before, but I haven’t heard of them). I bought a few of them, including 65 euros, and two of them were 300 euros, so I used two 300 euros in series. At this time, I found that using them as ore machines has a higher volume than white headphones and a better sound quality. The volume of the 350 ohm reed headphones is even louder.

In the past 10 years, I have collected a small number of white headphones intermittently and found that some of the coils are not cylindrical iron rods in the middle, but stamping the base of the headphones out to serve as the core of the headphones. For some headphones, the diaphragm is not a whole piece of thin iron sheet, but a piece of plastic film, and a small piece of iron is glued to the middle part. I think this method can improve the sound quality. But stamping the headphone base a small part as a core, I thought it would reduce the volume at first, but I returned to the iron rod or compared with the headphones that were originally iron rods, the volume seemed to be no different.