德官关于放大器的支持部分，有这样的一篇文章，翻译回来给各位参考一下，为了阅读的便利部分文字做了意译处理，附有原文可参照理解
When do you need to use a headphone amplifier?
什么情况下你会需要耳放？
There are various reasons for using a headphone amplifier:
以下情况适合于使用耳放：
1.The voltage level on the player is too low and therefore the volume emitted from the headphones is too low. It sounds too quiet.
1、播放器的输出电平太低，从耳机输出的音量太小，声音听起来过于平静。
2.The transmission properties of the headphone output on the player are not satisfactory (e.g. distortion, limited frequency response, noise, artefacts, low channel separation).
2、播放器上耳机输出的声音特性不能令人满意（例如：失真、有限的频率响应、杂音、结像缺陷、低水平的通道分离）
3.You want to have a specific sound influence.
3、你希望声音具有特别的特性
Beyerdynamic headphone amplifiers satisfy points 1 and 2 particularly well. However, as we simultaneously want to offer devices that are as neutral as possible, point 3 should not be a criterion when selecting our devices.
拜亚动力的耳放能够很好的满意第一点和第二点的使用需求，然而，我们同时希望我们提供的设备尽可能的中性，因此主要出于第三点使用需求挑选器材时，请谨慎考虑我们的设备。
Our headphone amplifiers also allow you to operate headphones with high impedances (e.g. 600 ohms) without any problems.
我们的耳放同样可以很好的适配高阻耳机（例如：600欧阻抗的耳机）