If you want a great vacuum tube sound, you have to use great tubes.

Ruby Tubes manufactures premium vacuum tubes and electrolytic capacitors. All Ruby Tubes premium power tubes are carefully tested and matched. Matching is accomplished by referencing both plate current and transconductance. In addition to preamp and power tubes, Ruby produces axial electrolytic capacitors that are perfect for vintage amplifiers and preamplifiers, as well as contemporary designs. Shop Ruby Tubes today at Parts Express.