在德国Accustic Arts（以下简称AA）旗下有一款极受好评的Tube Preamp II真空管前级扩大机，现在AA推出了第二代版本，名字叫做Tube Preamp II-MK2，原厂说明这是前代的修改版，或许称用小改款来形容应该更容易理解，除了延续前代设计重点之外，又增添了一些新功能，而 ...

When most people think of tube circuits, the first thing that comes to mind is often the use of high-voltage power supplies. It wasn’t a given for tube circuits, though, as a range of low-voltage ...

Upgrades include sonic improvements and new gain control functionality. Price of base model remains the same at $4450. Linear Tube Audio (LTA), the only manufacturer of amplifiers based on David ...