nzcym大大翻的真好,這樣一看我的似乎太生硬了. 不過其中有很多細節是雜誌上沒有提到的,請問是平時就有在做研究然後補上的嗎?

我來補上下一篇,希望大家別見笑...

以下截錄自雜誌...

打開機箱,可以看到720的訊源輸入端與目前大部分 Hi End 前級一樣,採用不接地的繼電器來分離各個輸入訊號,避免相互干擾. 而且,左聲道與右聲道各自一片獨立線路版,另外 MC 唱頭放大線路版也是獨立一塊架在主線路上上面. 720的線路架構屬於非平衡設計.

The inner side of the case shows the input of 720 is as the same as the most of the Hi End preamplifiers nowadays, that is, an ungrounded relay is used to separate input signals individually to prevent them from interfering with one another.

Moreover, both the left and the right channels have their own circuit boards independently. Additionally, the circuit board of MC phono amplifier has, as well as the channels do, an independent circuit board built on the main circuit board, which makes the framework of 720 to be an unbalanced one.

再來看到720的音量控制線路.除了電阻與繼電器之外,這個音量控制系統還加入他們稱為PGA ( Programmable Gain Amplifier ) 的線路,這個PGA線路有什麼作用呢? 一來讓音量控制的反應更直接,二者可以延長繼電器接點的壽命.

Apart from resister and relay, the volume control circuit was also added with PGA, Programmable Gain Amplifier, which hastens the reaction when adjusting volume and prolong the lifetime of the contact of the relay.

待續...