Top Pick Used ARP 2601 SYNTHESIZER AND 3620 Vintage 49-Key Synthesizer 49-Key

The ARP 2601 (a later variant of the ARP 2600 series) is a semi-modular, analog synthesizer known for its flexibility and rich sonic character. It features three voltage-controlled oscillators (VCOs), a 24 dB/oct low-pass filter, envelope generators, sample & hold, noise, ring modulation, and built-in spring reverberation, all patched internally but also accessible via external patch points for advanced routing. It was paired with the ARP 3620 keyboard interface, which adds duophonic capability (allowing two notes/voices), interval latching, repeat functions, and memory of control voltages—enhancing the expressive and performance possibilities of the system. Together, the 2601 + 3620 combo is prized for its hands-on patchability, expressive control, and vintage analog tone, and remains a classic among synthesizer aficionados.

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