声道分离度在20到30dB的黑胶 是否能准确重播立体声呢？

欧罗巴精神

Krell的创始人Dan说过，黑胶并不高保真，

但他依旧会偶尔在某个悠闲的晚上，倒一杯红酒，放一张黑胶，作为背景音乐，

作为一种背景音乐，体验休闲。



单声道的最高标准是三频均衡 高音甜，中音准，低音劲

但立体声重播讲求还原出一些现场录音的舞台感，需要的是左右声道信号的分离度。




出去当今最昂贵的唱头（分离度35dB），在最完美的理论状态下，

90度垂直在唱片上刮过，最高的分离度1000赫兹时，普通唱头都不会超过30dB，在20K赫兹时会更低。

18dB的分离度，让我们可以区分出左和右两个声道。


但离高保真发烧友的立体声是否足够呢？

只知道，许多黑胶唱片是单声道录音。










问：What is channel separation, and is 63db good for a headphone output?

THD < 0.05%
SNR > 90db
Channel Separation > 63db

yay or nay?


答：

channel seperation is just what it says. it's the amount of difference between 2 channels. mono = 0dB seperation as both channels share the exact same signal.

63dB isn't that good for a headphone amp. that means that the seperation between your left and right channels is LESS than your noise level (90dB)

if you have a sound that purely left... you'll hear the same sound on the right 63dB below the left (eg. at 27dB right for 90dB left)

it isn't the end of the world though. many phono cartridges have a channel seperation of just 20-30dB. 35dB is excellent for a phono cartridge.

by the way... the "name" for seperation is "crosstalk" which is the amount that one channel talks to another.  

63dB channel seperation  
is the exact same thing as
-63dB crosstalk

the number is how much louder a sound will be over a "silent" channel where the sound bleeds into. the silent channel will stay silent until the other channel reaches 64dB.