The TRS Connector is a 3.5MM Audio Connector that, according to WiKiPedia, is one of the following:
A connector designed to connect audio equipment and transmit audio signals.
According to the size, the TRS terminal family has three brothers:
The eldest is 6.35mm,
The penis is 3.5mm,
The third is 2.5mm.
The old 6.35mm is still common in audio equipment, and it was the standard interface for telephone exchanges in the past.
1970s: Telephone operator working in the 1970s
The two high-end ear players both use 6.35mm standard earphone port for output, which can be converted to 3.5MM Audio Connector for output
In 1979, SONY introduced the first generation Walkman, which pioneered portable music playback for the individual.
With the first Walkman came the smaller and still widely used 3.5mm stereo (TRS) headphone jack. It replaced the 3.5mm mono (TS) port because the old one only provided mono output, the new one supported two channels, and its smaller size. People will finally be able to listen to and enjoy music on portable devices.
Between 6.35mm interface and 3.5mm interface, the adapter can be easily converted.
This pair of Walkman king of industrial design, in today's also not out of date
A headphone connector that follows standard 3.5mm stereo (TRS) design specifications
The second 2.5mm interface is mainly used to connect the earphones of old portable walkman and mobile phones. However, because it is thinner than the 3.5mm plug, the structure is very fragile and easy to break, so it has been basically eliminated.
Compare the thickness of 3.5mm jack and 2.5mm plug
With the emergence and improvement of headphone noise reduction and stereo technology, 3.5mm headphone interface is also making steady progress, and the industry is silently supporting it.
When smart phones were new, in order to defend their right to speak in the industry, major manufacturers all adopted their own interface design, including the headphone interface, which was incompatible with each other.
Do you remember the similar "Octopus Brother" universal adapter?
Apart from the special interface earphones that came with the original manufacturer when purchasing the phone, it is difficult for users to find other models made by the manufacturer in the market, or the earphones specially customized for the interface of this phone by a third-party headphone manufacturer.
As we all know, the quality of the original earphone is generally not good, a little pursuit of sound quality users, hand will have better quality than the original earphone.
But the Walkman and iPod, two leading audio players, both used 3.5mm headphone jacks, which greatly expanded its popularity. Moreover, the production cost of earphones with unconventional interfaces is higher, and earphone manufacturers are not willing to make customization. In addition, there are many converters on the market for unconventional earphones with 3.5mm ports.
