When Korg released the SB-100 in 1975, they created something that proved you don't need complexity to get fat bass sounds—just one oscillator, a well-designed filter, and the right attitude about what a bass synth should do.
The SB-100 is a 25-key monophonic synthesizer built around a single voltage-controlled oscillator with five selectable waveforms: triangle, square, sawtooth, pulse, and a phaser-like setting that behaves more like pulse-width modulation. The heart of the sound comes from the "Traveler" low-pass filter with a switchable resonance peak, paired with a simple AD envelope and sustain control. You get pitch bend up and down buttons, an octave switch for extending your range across two octaves, and a pitch slider for fine tuning or vibrato effects. The whole thing weighs just 16.3 pounds and fits into a briefcase-style enclosure with full-size keys, making it genuinely portable despite its serious sound.
The SB-100 has earned respect among bass players and electronic musicians for delivering surprisingly powerful low-end character from minimal circuitry. Its sine wave is described as huge, the filter sweep is smooth and expressive, and the envelope has enough punch to cut through a mix. Players appreciate its straightforward workflow and the way its limitations actually encourage creative constraint—there's no menu diving or preset hunting, just immediate hands-on control. The compact footprint and vintage analog character have made it a sought-after piece for both studio work and live performance, particularly for dub, drum and bass, and experimental electronic music where that focused, characterful bass tone matters more than polyphonic flexibility.
