The Yamaha GB-100 Equalizer for Bass (s/n M862503364, Vintage, Made in Japan) is a rare Japanese-built graphic EQ unit designed to give bass players precise tonal shaping in a compact, stage-ready format. Produced during Yamaha’s highly regarded 1980s era of pedal manufacturing, it delivers clean, responsive frequency control with the reliability and low-noise performance the brand is known for.
The GB-100 features multiple frequency sliders that allow detailed boosting or cutting across the instrument’s critical ranges. This makes it easy to sculpt low-end punch, enhance midrange presence, or refine high-end definition, depending on the mix or musical style. A level control further adjusts the overall output, enabling subtle corrective EQ or more pronounced tone shaping for solos or specific song parts.
Built in a durable enclosure typical of Yamaha’s vintage pedal line, the GB-100 offers dependable performance for both studio and live use. Its Japanese construction and focused bass-oriented design have made it a desirable find for collectors and players seeking precise analogue EQ control with a distinctly vintage character.
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