VK-55

About the VK-55

The Balanced Audio Technology VK-55 is a meticulously designed vacuum tube power amplifier that combines a fully balanced design topology with intelligent automatic biasing of individual output tubes. It delivers 55 watts per channel into 8 ohms in stereo mode and 110 watts in mono mode, using the high-current dual-triode 6C33C-B tubes, the same used in BAT's flagship REX II amplifier. The VK-55 features a compact chassis (17" x 8" x 16") and weighs 50 lbs. It offers a frequency response from 8Hz to 200kHz, a nominal gain of 25 dB, and low total harmonic distortion of 3%. The amplifier includes 4 x 6SN7 and 4 x 6C33C-B tubes, with an input impedance of 215 kΩ in stereo and 108 kΩ in mono. It has an intelligent auto-bias design that adjusts for line voltage changes and tube aging, ensuring optimal performance and ease of use. The VK-55 can be upgraded to monoblock operation by adding a second unit or a wire kit. It is known for its midrange clarity, power, and dynamic musical insight, providing a vivid, relaxed, and liquid sound character. The amplifier does not have remote control and consumes 400W at idle and 800W at full power. It is highly regarded for its build quality and sonic performance in the high-end audio community.