Octave
OCTAVE manufactures more fantastic tube amplifiers that rival the best transistor equipment in terms of stability and dependability. They are committed to making the best-sounding, most dependable vacuum tube amplifiers on the market. Their isolation transformers are the only ones on demand created by the same individuals who built your favorite vintage tube amps. They thoroughly tested every piece of their equipment, from the carefully selected parts to the hand-wired circuitry. Tube amplifiers, guitar preamps, power amplifiers, studio interfaces, and other audio equipment are available.