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6C33C-B Triode Output Tubes with Fully Balanced Signal Path

Delivering 55 watts per channel, VK-80i uses four 6C33C-B triode output tubes for power delivery. They offer many times the current delivery of the 6550/KT90 tetrode tube variant used in most traditional tube integrated amplifiers. In addition to driving even difficult low-impedance speaker loads, the all-triode fully balanced design provides a natural portrayal of harmonic texture and instrumental timbre. Your recordings will sound more alive while simultaneously yielding greater finesse, grace, and inner detail.

“Fuse-less” Protection Circuit 

In the event an output tube becomes over-stressed, all you need to do is turn VK-80i off and on again to restore normal operation. That’s it. The elimination of internal fuses also contributes to a greater sense of ease and more natural reproduction of music. Also, the fuse-less protection circuit is combined with a world-class automatic-bias circuit that eliminates the constant need to set and readjust the proper bias of the output tubes. No tubes to bias. No tube fuses to replace.

Intelligent Auto-Bias Design Makes Operation a Cinch

The advanced engineering within VK-80i eliminates the traditional headache associated with most vacuum-tube power amplifiers—specifically, the constant need to set and readjust the proper bias of the output tubes. VK-80i features an intelligent automatic-bias design that adjusts for changing line voltage and aging tubes, with each output tube having its own dedicated bias circuit. The auto-bias circuit also ensures your VK-80i sounds wonderful within the first few minutes of listening.

Output per channel at 8Ω/4Ω

THD at full power

Frequency response
8Hz to 200kHz

Input impedance
215 kΩ

Tube complement
4x6SN7, 4x6C33C-B

Power Consumption
400W idle, 800W full power

Remote included
Yes – all metal

Signal inputs
1 XLR, 3 RCAs

Volume control
Resistive ladder, 90 steps, 1dB per step

17″ W x 8″ H x 16″ D


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