KR Audio Electronics sro is located in Prauge, Czech Republic is a manufacturer of hand-crafted, high quality tubes (all glass is hand blown) and audio equipment.
Their company began by doing the research and finding ways to improve classic triodes in 1992 and started its life as a tube manufacturer, first with the historic Marconi valve reproduction and then tubes for audio as an OEM upgrade option in hi-end audio amplifiers in 1994. Their success is a direct result of the comparison between the hand-made KR tube and the mass produced tube made on 60+ year old tube machinery.
Given the unique technology they have developed, KR was able to satisfy the demand for a better 2 channel stereo. It has been said that nothing comes closer to live music than our sound reproduction. A KR tube gives the listener increased dynamics, greater detail from the recording, be it vinyl or CD, and an almost tangible imaging.
The tube division currently makes 12 models to cover most audio requirements for imporved sound be it a normal up-grade or an innovative design.
Patented multi-ribbon filament / cathode provide four emissive surfaces per filament, equating to 32 electrical cathodes (eight filaments x four surfaces = 32). This unique design provides far greater power output and sonic dynamics.
Extreme dark black plate insures the most efficient electron absorption, providing the highest audio power output possible.
All glass is hand blown and formed in KR Audio from ultra durable SIMAX®, a world renowned borosilicate hard glass available only in the Czech Republic, insuring the strongest vacuum possible.
Polished heavy brass bases provide excellent heat dissipation and solid tube support.
Robust Bakelite bases provide superior arc protection, durable heat resistance, and solid tube support.
Gold plated pins provide corrosion free connections that never interfere with the music.
Each power tube has internally mounted serialization for quick identification with verifiable performance records.
All tubes are very hard vacuum taking from several hours to days (depending on tube type) to accomplish. A Hard vacuum insures very long life under extreme usage.
Each power tube, from start to finish, requires 128 hours of labor to construct.
KR Audio has been building tubes since 1992, the craftsmen at KR Audio have been building tubes for much longer.