Many people only pay attention to the conductor material of the IEM cable when choosing, such as pure silver, silver-plated copper, gold and silver cable, and recently some have even mixed in metals like platinum. Each material has its own unique sound characteristics. Peter believes that the conductor is only a part of the IEM cable, and the weaving method, welding method, and even the plug can also affect the sound. However, he believes that the most influential factor on sound quality is the structure of the IEM cable, as the structure can greatly change the amplitude of the sound. For example, a coaxial single core with shielding structure effectively eliminates internal and external interference, which means a quieter background and better auditory experience. "It is not difficult to notice that even with two different brands or even pure copper cable from the same brand, the sound can be significantly different. In fact, it is the structure of the cable that directly affects the sound. Each wire also has a 'extension rate' in its design. For example, when a cable is pulled under a fixed diameter, its extension can be observed. The stronger the extension, the better the conductivity. Therefore, the extension rate can determine the quality of the sound, and this number has always been a secret that cable manufacturers do not disclose."

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