KT150 vacuum tube made by  Tung-Sol – beam power tetrode.
KT150 vacuum tube made by  Tung-Sol is the most powerful octal beam tetrode ever produced. The Tung-Sol KT150 glass envelope is a special egg shaped balloon that was developed to improve thermal dissipation and maintain a superior vacuum for the best sound. It characterised by wonderful powerful sound.  The bass extension is tight, full, and precise. The main advantages are neutral midrange and transparent high end clarity. The dynamics are unlike anything we have ever heard before. This is truly titan of beam tetrodes.
Tube socket – octal.

When ordering a pair or it`s multiples, the tubes are matched free of charge in configurations: pair, quad, sextet or octet.