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发表于 2010-8-24 16:22:24
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这支耳机说是headfi上全都喜欢倒也不是，有人形容过他的声音，素质上说是密度奇高，鲜活感好，与hd800对比的时候说hd800很难从整体上融入音乐，而lcd2能够很容易融入音乐，是大多数headfi上面的人听过速度最快，低频最有力度的耳机，我询问lcd2作者关于耳放匹配的时候，他写了一段长文，主要是说耳放的推力很重要，最小最小的这个耳放的输出在1w，他以听交响乐为例，目的是说明下lcd2应该体现的声压，他的建议和我询问的mail如下，可能我有理解错的地方，大家勿拍
至于缺点，有过lcd2的玩家我也接触过几个，第一这个耳机很难推（按照美国人的听音喜好），第二 这个耳机带着非常难受（和一些yy的人不一样，带过都说难受），难受到什么地步呢，像刑具一样，两边夹着头，5-10分钟就会反复调整。。。。很可怕，我自己带着说实话的确不好受，第三，这个耳机高频偏暗（不过这个也未必是个太缺的缺点。。）
in general here is the information, The LCD-2 has an impedance of 50 ohms, which is purely resistive and is almost perfectly flat across the entire frequency range.http://www.audeze.com/2009/12/wa ... iver-impedence/Lets us say you listen to symphony-orchestra. This type of music can have dynamic range of 60 dB. i.e if silence (room noise) is at 60 dB (LCD-2 is open type headphone design with almost no attenuation of ambient noise) and the maximum occasional peak needs to be 120 dB. I am just giving an example here, but depending upon the type of music and the recording this varies. 120 dB is very loud - almost Rock Concert level close to the speaker.
For the LCD-2, if you put 1 mw of power, you get about 90dB output. For this example, let us assume 90dB is the level you listen normally. To reproduce the occasional 120 dB peak without clipping on the LCD-2, the amplifier would have to output 1000 times more power than 1mw, i.e 1 W.
So, an amplifier that can output 1w is the bare minimum. Amplifiers will have distortion metrics at different wattage levels. If an amp can output maximum 1w it would be barely sufficient and might have a lot of distortion at full output.
So I would suggest an Amp that would at least be able to provide a couple of watts of output without any clipping. Damping in amplifiers is not a big problem for LCD-2 since the impedance doesn’t vary.email me if you have any other questions. |
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