UID466923
威望0
金钱37384
交易诚信度22
主题13
帖子359
注册时间2008-1-17
最后登录2021-2-5
中级会员
交易诚信度22
注册时间2008-1-17
|
尊敬的JBL螺先生，我怀疑您根本没有阅读原文。因为原文当中并没有回答我提出的问题。原文主要描述的是如何不让电容工作在交越状态，文章认为交越状态下，电容会产生不好的声音，信号会不光滑。
我关注的是，在电容C1A和C1B之间连接一个电池的正极，相当于在这个点对地交流短路的。信号还怎么能正常流过C1B呢？相当于C1B被短接了。同样对于C2A和C2B 也一样，交流对地短路，信号还怎么流进高音喇叭HF呢？
在此我把英文原文的文字贴在这里，让懂电子线路的人可以通过谷歌字典翻译，分析一下：
core saturation and hysteresis are relatively well understood and controllable in the design and selection of inductors. with capacitors,however,it is a different story.capacitors are much more complex with charge-coupled technology,audio signals do not cross the capacitors' dielectric zero,so they do not experience the phase anomolies of conventional networks.this is analogous to the difference between class A and class B amolfier performance.
they selectively control the flow of audio frequency signals to the various drivers in the system by changing their resistance (actually,reactance) to various frequencies,non-reavtice components,generally resistors,printed circuit boards,and wire do not change their electrical nature with frequency.(the k2 5500 is internally wired with monster cable to assure competely non-reactive wire performance.)
reactive components behave differently at different frequencies; this is the behavior that permits the dividing action of the crossover networks.but along with this behavior comes varying transient characteristics, which also change with frequency. in the case of inductors, two factors which affect transient response are called core saturation and hysteresis. core sturation results in a rapid change in inductance value resultin in F.M. distortion. Hysteresis in a characteristic which dela with inductance change in the area of zero crossings; this results in an increase in F.M. distortion,which is highly audible in audio reproduction.
devices than coils,and their behavior in speaker crossover networdk is far less understood.
compared to conventional network design,charge-coupled thchnology uses twice as many capacitors and the calue of each capacitor is doubled.in this way,the correct calue resules and the voltage presented by the battery is transparent to the amplifier.
capacitors do not exhibit hysteresis,per se ,but they have a behacior with similar results,called dielectric ab-sorption.whtn an audio signal passing through a capacitor changes polarity,that is ,it passes through zero volts,the current flow change direction.but it does not do so immediately;due tu dielectric absorption,the acpacitor "remembers" tis precious state and resists change.this leads to blurring of transients in the deive signal,a highly audible distortion.
a capacitor si fundamentally two conductive plates separated by a dielectric,or semi-insulator. current flows through the capacitor by setting up different voltages on the two plates.the difference in the voltages and the frequency of the signal determine the amount of current flow.the imppedance of a capacitor,that is,how much it resists the flow of current,is dependent on the signal frequency and the physical and electrical matures of the capacitor.in combination,these factors are called capacitive reactance.
factors that deteimine the sound quality of a capacitor in a crossover natwork include the material composition of the conductive plates,the material composition of the dielectric,and the tightness of the winding of the capacitor.in general,"fast" capacitors,that is,those with technically high transient response,tend to sound sharp,while capacitors that sound"smooth"tend to have slow |
|
楼主: edisonaudio
[复制链接]
京公网安备 11010602010207号
( 京ICP证041102号，京ICP备09075138号-9 )
狗仔卡
发表于 2018-2-1 21:45
楼主
