Up for sale, a 1982 Yamaha “Professional System Effectors” Octaver OC-01 in perfect working order, complete with the original box and paperwork. The Professional System Effectors pedals were the first stompboxes ever produced by Yamaha, introduced in 1980, with 10 unique effects. This Octaver OC-01 is a straightforward, no-nonsense effect, adding an additional tone one octave down from the input signal, with Direct Level and Effect Level knobs to fine-tune the wet/dry mix. Additionally, the Polarity switch allows the input signal to be inverted to further fine-tune your sound when interacting with other effects in the chain.

There is moderate scuffing around the edges of the enclosure, with clean silkscreen graphics and the original knobs.

The original box is included, along with the paperwork, which is dated to the 57th year of the Showa period (translating to 1982).