KR 5U4G RK LIMITED SERIES

KR AUDIO 5U4G RICCARDO KRON LIMITED SERIES

• Use of Zirconium - as the coating for the anodes
• Improved structure support in the least vibrating glass points with double mica
• Ceramic bases
• Gold plated base pins
• Triple thickness glass 
• Doubled cooling radiation surface for anode cooling
• Barium heaters that run colder and have better emission
• Closer tolerance matching
• 9th degree of vacuum for extended longevity