Telefunken Elektroakustic completes its Black Diamond series of vaccum tubes with three new models for hi-fi and instrument amps.
![[NAMM] 3 Telefunken and JJ Tubes vacuum tubes](https://img.audiofanzine.com/img/product/normal/2/3/230943.jpg?fm=pjpg&w=334&h=243&fit=contain&s=c1e82ee018153b09d453afda546a3ca8)