Today we'll discuss two common interface types: MMCX and 0.78mm interfaces. These two interfaces are widely used in audio equipment, each with its own advantages and disadvantages.
🌈🌈🌈 Interface Types
Common interface types include 2-pin (0.75mm, 0.78mm), MMCX, and a2dc. Currently, the most mainstream interface is MMCX, a coaxial RF connector that uses a snap-fit connection and can rotate 360 degrees. Its characteristic impedance is typically 50 ohms. MMCX interfaces are circular, with the outer ring being negative and the inner ring positive (Shure's middle ring is positive). 2-pin interfaces are small and square; the difference between 0.75mm and 0.78mm lies in their outer diameter. The a2dc interface looks very similar to traditional MMCX, but with a longer metal plug.
🔌🔌🔌 User Experience
In terms of usage, MMCX pins can be inserted in all directions, while 2-pin pins can only be inserted in two directions. a2dc is primarily used in the small metal series. MMCX has a 70% market share and is relatively cheaper (though some luxury brands may use high-quality MMCX). 0.78mm pins are generally more expensive than a2dc.
💡💡💡 Advantages and Disadvantages Comparison
MMCX pins are relatively secure, but prolonged insertion and removal or rough handling can lead to poor contact compared to 0.78mm pins. The advantage of 0.78mm pins is that they don't experience poor contact, but they are more prone to breakage or bending. a2dc is mainly used in the small metal series, and its biggest advantage is that it's interchangeable with other small metal series pins, which is very convenient. Finally, MMCX has a major advantage-strong Bluetooth support.
🔧🔧🔧 Expandable Connector
MMCX also has an expandable connector, which can be seen as an improved version of MMCX. It has a longer lifespan, is more stable, and is adjustable, effectively reducing poor contact. However, this type of connector is more expensive, and some expandable connectors are not well-matched with traditional MMCX connectors. Some cables are also optimized for ear tips; for example, some small-sized cables have a stabilizing device, but these are more expensive.
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Summary
In summary, MMCX is prone to loosening (the expandable connector works well), 0.78mm is prone to breakage, while a2dc has excellent universality and compatibility issues are not a concern. Hopefully, this information will help you better choose the right connector type for your needs.