KR AUDIO KR211 Matched Pair

The 211 is not an extension of the 300B or 2A3, and the voltage and energy are exceptional. The well-designed 211 single moves forward without major disruption of the sound image, and works in the direction of "pushing" the depth of the space. The fun of the 211 is that it allows you to realistically expand the speaker options while maintaining the beauty of a small-output triode.

The KR 211 numerically sets the foundation for the stable operation required of the 211 system. The filament is 10V (±5%)/1A, and the amplification factor is 12. It has a maximum rating of 1250 V plate voltage, 140 mA plate current, and 100 W plate loss. First of all, this is the most important "condition on the amplifier side".

In the world of 211 amplifiers, it is common to talk about designs that aim for the 20-26W class with pure A-class. The KR211 is also distributed on the premise of 211 single/211 amplifiers in that range, and is treated as classic 211 compatible.

Compatibility and Usage Notes

211 is a ball that runs on high voltage. The amplifier side must be designed with 211 assumptions and meet the conditions including heater capacity, insulation, heat dissipation, and socket area. The 10V/1A filament is not only high voltage, but also susceptible to power quality, so if the design is weak, the stability will be lost before the sound.