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Congratulations
Please accept our sincere thanks and congratulations for making
your musical choice Butler Audio. This new USA-Patented
technology from BK Butler promises to become a classic design,
just as his former efforts have in the professional music and auto
sound industry.
After more than 25 years of tube audio experience in the
Professional Music Industry with some of the world's greatest
musical talents, BK Butler has now created an entirely new class of
home audio and theater amplifier products. With careful emphasis
on the achievement of practical "all tube" response characteristics,
Butler Audio's Tube Driverb BLUE technology satisfies even the
most critical vacuum tube audiophiles.
The Past is the Future™
For the first time in the history of tube amplifier design, the original
"Edison Effect," or the essence of pure Thermionic vacuum tube
emissions have been fully utilized to yield very low THD distortion and
produce "all tube" type musical response characteristics in a multi-
channel home amplifier. With painstaking efforts and great
attention to detail, BK Butler has balanced the sonic response, load
and transfer characteristics of individually selected twin triode
vacuum tubes to operate under optimum conditions in this open-
ended ZERO global negative feedback circuit topology.
Previous hybrid designs employing vacuum tubes generally utilized
tubes only in impedance-isolated preamp or driver stages.
However, Butler places the triodes exactly where they should be:
DC - Coupled through the output power devices to the speakers.
Therefore, the tubes are positioned to naturally and actively
respond to the speaker load. This also completely eliminates one of
the most inefficient and non-musical components in a typical tube
power amplifier: the Output Transformer. Without hundreds of feet
of phase-shifting, musicality-robbing wire and many pounds of
induction-generating core iron to overcome, Butler's newly
patented current-multiplying DC coupling circuitry allows the output
driver tubes to directly operate into the fixed ratio-reduced speaker
output load. This novel design results in the production of authentic
power vacuum tube characteristics hundreds of times greater
than normal capabilities of the driver tubes.
Comparable in concept to precision racecar active power steering,
Butler allows the tubes to "power steer" the audio output signal
directly into your speakers. The result: A superlative marriage of
tube and solid-state technology without the limitations of either.
Literally, you get the reliable, efficient power capability of solid-state
with all the greatly extended dynamics, warmth and musicality of the
highest quality vacuum tube design available today.