本帖最后由 zjzju 于 2019-1-7 23:00 编辑
看了一段科普,确实高阻耳机好推些,低阻难推。高电压能够克服其他设备带来的杂讯。同一高电压下,低阻对电流的要求更大(U=I×R)。而高阻则对电流要求很小。所谓难推,主要是吃电流,对耳放要求高。In contrast, many high-quality headphones, such as the Sennheiser HD 650 are intended for studio use and have much higher input impedances. Large voltage swings are always used in professional audio equipment. High voltage signals overcome the low-level noise that is produced by all electronic devices. Large voltage swings make it easier to achieve a very high signal to noise ratio (SNR). When large voltage swings are available, high-impedance headphones can take full advantage of the available dynamic range. High-impedance headphones are easier to drive than low-impedance headphones because they usually draw less current from the headphone amplifier for a given loudness. This often means that distortion will be lower when using high-impedance headphones. High-impedance headphones are a great choice if your headphone amplifier can supply enough voltage to drive them. https://benchmarkmedia.com/blogs/application_notes/14017381-headphone-impedance-and-sensitivity
机翻:相比之下,许多高品质的耳机,如Sennheiser HD 650 适用于演播室,具有更高的输入阻抗。专业音频设备中总是使用大电压摆动。高压信号克服了所有电子设备产生的低电平噪声。大电压摆动使得更容易实现非常高的信噪比(SNR)。当有大电压摆幅时,高阻抗耳机可以充分利用可用的动态范围。高阻抗耳机比低阻抗耳机更容易驱动,因为它们通常在给定的响度下从耳机放大器吸取更少的电流。这通常意味着使用高阻抗耳机时失真会降低。如果您的耳机放大器能够提供足够的电压来驱动它们,则高阻抗耳机是一个很好的选择(来自benchmark media网站的音频应用笔记)。
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