Latest News & Reviews

           
 

Seduction Of Vacuum Tube Amplifier
The superior quality of Vacuum Tube Amplifier has always been recognized and given compliments by Professional Musicians, Mistral, Record Artists, Music Commentators and Professional Audio Engineers because of its unique structural construction.

As according to Experts: “The perfect combination of Vacuum Tubes , High Efficient Power Supply Transformer and Stable Audio Output Transformer achieve significant improvement on audio sound re-production.” Vacuum Tube Amplifier is found absolutely suitable for suppressing and neutralizing the annoyed “Rigid & Artificial” feelings generated from Digital Medias like: CD, Vinyl LP, DAT, MD…etc…

Besides, it also reproduces superb audio quality, especially in terms of Ambience, Hall depth effects, Instruments separation, Human voice and Harmonics. The reproduced music sounds natural and smooth. That's “The Seduction of Vacuum Tube Amplifiers”

The LEO Group of Companies have been in the electronics field for over Thirty years, have developed a range of Hi-End Vacuum Tube Amplifiers and Professional Speakers Systems at very affordable price. Why not find out by yourself and enjoy the natural sound of music now.

胆机之魅力

胆机之魅力, 是需要親身体验, 非文字可以形容. 不論任何声频訊号: CD, Vinyl LP (黑胶唱片), DVD-Audio Disc, MD, DAT [另外包括 MP3,手机等....等], 一進入胆机, 便全部反映到喇叭, 经由空氣传播到你的耳朶裡. 有人会有疑问: "你卖胆机, 一定係卖花讚花香喇!!"

此点是有科学根据的,一般石机 (半導体功放) 的設计, 喇叭是直接接到半導体上, 电流由喇叭流经半導体. 一般阻抗为 4-16 Ohm (如8 Ohm), 只是在音频 1KHz 的数值. 但在工作时卻隨频率而变动, 有时会低至 2 Ohm, 但亦可高至 50 Ohm; 这时半導体便疲於奔命. 因为阻抗直接影响輸出功率. 大部份石机规格列出: 8 Ohm 时是 100W, 而 4 Ohm 更加是 200W. (部份高级石机如: 麥景图 'McIntosh' 等..., 因設有輸出牛则除外), 一般人以为执到宝, 但这正正就是死穴所在.

胆机在愛迪生发明电灯泡後便出现,学名叫 '真空管/电子管'功放, 距今超过120年. 喇叭与輸出变压器 (輸出牛) 的关系, 恰如孪生兄弟, 分工合作, 收到由胆传來之訊号便送至喇叭. 这是为什麼呢? 由於真空管结构特性, 工作电压动辄三五百伏(V), 需数千 Ohm 阻抗才可有效工作, 喇叭的结构根本不能应付. 故一併设计出輸出变压器, 將阻抗提升, 一般为 5,000 : 8 Ohm. 因为这样, 真空管永遠在一个固定範圍內工作,无需理会什麼频率, 都照单传送; 而輸出牛便有如汽車避震器, 即使喇叭阻抗变更, 亦不会直接影响真空管運作, 輕鬆地放大音源讯号.

要比較两者器材亦不困难,只要將胆机及石机设置同一音乐輸出强度,便高下立见. 胆机可輕鬆及無损地还原(重播)原本声频訊号. 而石机則要添加 "味の素" (高低音频调整) 來蒙混你的耳朶了!!

James 柳德衍 (LEO RESEARCH 創办人及设计师)
 

HK Review & SIN_Review

Spec, SIN_Review

   
   

User Review

Spec, SIN_Review

   
   

SIN_Review

SIN_&_HK Review

   
   

James' Interview

LR-845DM Review

     
   
 
 
     
 

Updated on 31-Oct-2014