随便谈几根便宜网线，赛尔之声nc100、Lindy 8类、酷比客 8类

任任任

上了个百万交换机，一前一后两根网线，搭配可有得折腾。为了减少工作量，就先把手头的网线单独直插路由器听了一遍，顺便分享下吧。

网播是鼠莓派pi4。ab时为了方便快速切换，用的是iPad pro走AirPlay。


不知道什么线 cat5类（1米）
这跟黄线是拿来作对照的，其实听感还挺宽松的？主要问题是比较松散，密度一般，乐器略缺乏质感。偶尔高频会有点燥。

酷比客 cat8类（1米）
比较有能量感，厚度不错，带点温暖和细腻。比普通网线更清晰、密度更好。算是一根比较泛用的平价、略厚声、均衡的网线。这根是之前被一位烧友推荐的，确实可以。

Lindy LSZH cat8类（0.5米）
很清澈，明快、干净且透明。解析感不错，低频下潜以及低频纹理的表达非常优秀；但高频比如小提琴的表现，在我这里有时略显得过亮，且声场显得挺局促的，比较头中舒展不太开。
按照玩数字线的经验，不那么舒展、偏亮的声音一定程度上有线材比较短的因素，但我猜这方面应该影响不至于那么的大？
于此，基于以上的缺点，个人感觉也许lindy更适合针对性地搭配系统使用（比如搭配交换机、串上另一根网线中和，或者直插用于本身较暗但宽松的系统），且最好有别的线当参照物。

赛尔之声nc100 cat6类（1.5米）（金属屏蔽头插在路由器端）
作为这里面最贵的、唯一为hifi设计的网线，确实很强。一耳朵豁然开朗，是一种非常宽松、舒展、安定耐听的声音；同时拥有最细腻流畅的表达，娓娓道来且具有不错的鲜活感。值。

中关村东路

有意思，家里坏了两根网线我也正想买呢，看到如下三个链接，建议使用非屏蔽线，你测试的似乎都是屏蔽线，试试对比下不屏蔽的六类？

链接一是dcs论坛上一个dCS: Programme Manager的说法，

https://dcs.community/t/what-ethernet-cable-are-you-using-into-you-streamer/882/23

Andrew Papanikolas, dCS: Programme Manager, Streaming Audio, Apr '20

I use an Amazon Special CAT6 (I believe the brand is either Cables 2 Go or Cables Matter) between my Vivaldi Upsampler and Ubiquiti switch.

I have a unique position in the industry as the “network streaming guy” for one of the premier digital audio manufacturers so I could easily have any audiophile cable currently available. I still chose the basic unshielded cable that passed certification.

Keywords above are unshielded and passed certification.


链接二解释的比较详细，

https://audiophilestyle.com/forums/topic/46225-shielded-vs-unshielded-ethernet-and-grounding/

The issue with shielded Ethernet is that the shield has the potential to connect the ground plane of the audio device to the ground plane of whatever it's connected to. This gets especially bad with switches that use a wall wart power supply as they do not have a real connection to earth. In that case the audio component's ground becomes the ground for the network device and potentially anything else connected through that network device. It gets ugly from a noise perspective.

......

We recommend against using shielded Ethernet cables as the shield is a very easy way for noise to get onto the ground plane of the audio system. This is especially bad when dealing with digital as that noise can create some issues both on the digital and  analog sides. The noise may not be audible, but it's definitely within the current differential between a couple of bits. In other words, you may not be able to hear it, but it may be messing with the overall resolution of your system.


链接三是朋友发给我的，似乎是山泽的解释

https://www.sohu.com/a/336783119_120150037

2、屏蔽网线对布线系统的要求

我们对屏蔽网线存在一个很大的误区：只要选择屏蔽网线来进行网络布线，肯定会大幅度的屏蔽各种干扰。

其实屏蔽网线对布线系统的要求很苛刻，首先需要布线场景有良好的地线系统，通过地线才能将干扰电流导向大地。与此同时，布线系统需要处处屏蔽，比如水晶头、插座、交换机等等，如果有一个部件不是屏蔽的，整个系统就起不到屏蔽效果。而目前市场上还很少有可支持屏蔽的网络集线器或计算机，所以很难实现整个传输链路的屏蔽。

3、屏蔽的真相

我们要知道屏蔽网线抵抗的是来自外部的干扰，也就是说外部环境有强干扰时，才适合使用屏蔽网线，比如网吧、机房等网线较多的环境。对于网线内部的信号串扰是没有任何降低作用的，相反如果屏蔽网线高频传输时，需要两端接地，但是接地的两端很容易出现电位差，这样一来，屏蔽层会产生干扰电流，成为系统中最大的干扰源。