The Boss OC-2 Octave pedal produces additional tones, one and two octaves below the original note. The pedal has a direct level control knob for exact tonal shaping and separate controls for octave 1 (OCT 1) and octave 2 (OCT 2).
Fig. 1: Boss OC-2 Octave guitar pedal schematic diagram
According to BossArea.com, the OC-2 was sold from 1982 to 2003. The pedal was painted originally in a much lighter brown color and it was labeled Octaver. The name changed to Octave in 1984 and the darker shade of metallic brown was introduced about a year later.
3 Controls: Octave 1 Level, Octave 2 Level and Direct Level
Connectors: Input, Output, AC Adaptor
Residual noise: -100dBm (IHF-A)
Maximum input level: -5dBm
Maximum output level: 0dBm
Input impedance: 1MΩ (FET input)
Output load impedance: > 10kΩ
Minimum operating input level: -60dBm al 250Hz
AC Adaptor: ACA series (black label) or PSA series (silver label)