KR Audio is a European manufacturer specializing in high-end vacuum tubes and audio equipment. Located in the heart of Europe—the Czech Republic—KR Audio focuses on producing directly heated audio transistors and high-end audio equipment. All KR products are handcrafted, starting with the selection of glass, vacuuming and metalworking, glassblowing and design, chemical and electrical design, and an absolute refusal to use automated production lines—all contributing to KR’s unique high quality.