轉載: 試聽Soulution 710功放

sai2020

回復 柒喜 #38 的帖子

咁平價機聽情歌有無問題.......有無好介紹
我阿媽果D最鐘意聽徐小鳳果D歌。

柒喜

sai2020 發表於 2014-2-25 16:45
回復 柒喜 #38 的帖子

咁平價機聽情歌有無問題.......有無好介紹

如果你要開很很大聲的話又要價平可以考慮NAD，因它有特別設計不會容易燒機

auraheart

柒喜 發表於 2014-2-25 18:14
如果你要開很很大聲的話又要價平可以考慮NAD，因它有特別設計不會容易燒機

NAD not a rock machine to me, hehe. More or less an old cake amp for some classical, maybe Jazz music and NAD is not designed to be very heavy duty.  It could handle some peaks but not loud volume continuously.   A good test for it's protection circuits.  A good used Sansui or Pioneer integrated amp will work better (not the cheap line though), even a 20 year plus one...Very well build for what it cost.  Most of the newer low end hi fi are cheaply build, unlike before. For 徐小 g 果D歌, NAD fine..

柒喜

auraheart 發表於 2014-2-25 19:15
NAD not a rock machine to me, hehe. More or less an old cake amp for some classical, maybe Jazz mu ...

雖然我就唔中意NAD既聲音，但佢有兩個獨有既功能的確無咁易燒機
NAD發明專利柔性剪峰
      Soft Clipping電路革命性令純電晶體製作擴音機散溢出叫發燒友如痴如醉的甜美而柔媚之天文數字價位膽機才有的風韻!
       當年what hi-fi 250英鎊級別的5星功放。
      “柔性剪峰”(Soft Clipping)是一個相當有用的功能，您可以選擇開啟或關閉此功能。一般人都有這樣的經驗：如果功放音量開得比較大，或音樂電平起伏較大，功放的輸出超過其額定功率，會產生削波失真，聲音變緊、生硬、失真。而NAD的Soft Clipping電路正是通過適當減小輸出功率等辦法來保持波形的完整，減少失真。如果只以適中功率使用NAD功放，則可關閉此功能；反之也可以開啟，既可保護音箱，又可保護自己的耳朵。
       “氣囊功率”(Power Drive)也是NAD的特色線路，這是NAD於上世紀80年代和90年代著名的Power Envelope電路技術的進一步發展和改進，它能在瞬間高輸出的情況下提供更強大的電源供給，使功放的大功率輸出更穩定，驅動力更強，低頻更出色。 Power Drive電路與Power Envelope電路相比，效果更為顯著，同時整體失真更小。

123faifai

無錢買，睇吓就好

auraheart

柒喜 發表於 2014-2-25 21:13
雖然我就唔中意NAD既聲音，但佢有兩個獨有既功能的確無咁易燒機
NAD發明專利柔性剪峰
      Soft  ...

Power Drive is not a protection circuit, it gives a little extra juice form the power supply for momentary peaks, but it is not as good as a full time, larger power supply.  It is a good cost saving feature.   I believe that Hitachi took it a step farther by having Class G amps and Soundcraftsman had it's Class H amps...maybe based on such idea or maybe a coincidence.    Well, I don't know...none said they learned from NAD.  Soft clipping is some kinda current limiter instead of switching on/off...it works linearly.  It wasn't a revolutionary invention.  Working theory was there all along.  It is a protection circuit, any protection circuit will degrade the sound quality, one way or the other (I don't even like a fuse).  Just happened some people liked the sound of it specially for the money.  Wonder how many of those reviewers actually used them as main system.  Maybe true at the time, a lot of users thought they get more than they paid for.  Just leave the chassis construction aside (NAD never had fancy cases),  NADs are light weight..hehe.  Nervertheless, NAD never got popular as the major Japanese makers in the lower end market (I still remember how over build some of those Pioneer and Sansui are, middle of the line and up, too bad don't happen today lol...).  I agree those are good features, and compromise effectively lower the cost of manufacturing amps for average users.   I never liked NAD, never spend time to study it.  So, what I said could be wrong to most.   Just my 2 cents, no offense.

補充內容 (2014-2-26 04:48):
Simplest way to explain the class G & H:
Class "H" was an attempt to adjust the power supply voltage by a continous dynamic regulation instead of switching to set higher voltage rail as in class G, class G also required another set of outputs.  Class G has an amplification of 207 degrees compare to class A/B's 270, a more efficient design. An example of a good idea implemented badly, or because it was Japanese idea..I wouldn't know. It was brilliant that focused on both power supply and out put stage, my humble opinion.  (more complicated than NAD's)  Ending was just like Sony's VFET (VFET, RET, EBT), dead..lol..All Japanese first class innovations were dead, some for no reasons..hehe.  Can non-Japanese designers adapt their technology and use them in their own design that fits the "taste" of their groups? LOL...!

chu691030

可以拿番屋企聽一聽就好啦