ARP Odyssey Model 2800 (1972–1975)
Compact duophonic analog synthesizer introduced as ARP’s answer to the Minimoog.
Overview
The ARP Odyssey Model 2800 is the first revision (Mk I) of ARP’s flagship portable synthesizer, produced from 1972 to 1975. Designed as a direct competitor to the Moog Minimoog, it was one of the first synthesizers with duophonic capability, allowing two notes to be played simultaneously under specific conditions. It offers a hard-wired, patch-cord-free design with all parameters controlled via front-panel sliders and switches, making it performance-ready. The Odyssey gives a simplified, compact version of the ARP 2600’s architecture in a stage-friendly format.
From 1972 to 1974, the Model 2800 featured a white-faced front panel with black lettering; in 1974, ARP switched to a black panel with gold lettering. It includes a 37-key keyboard with pitch-bend via a rotary knob and pressure-sensitive buttons. The unit has no interface jacks for CV/Gate control in its original form.
Specifications
| Production Years | 1972–1975 |
| Oscillators | 2 VCOs with sawtooth, square, and pulse waveforms; oscillator sync and pulse-width modulation |
| Filter | 2-pole voltage-controlled filter (model 4023), resonant low pass with high pass in series; filter can be modulated by LFO, S&H, envelope, keyboard, or CV |
| Envelopes | AR and ADSR generators |
| LFO | Sine and square waveforms |
| Modulation | Sample-and-hold function; S&H input mixer can route VCO output to FM input of VCO 2 and VCF for audio-rate FM |
| Polyphony | 1–2 voices (duophonic) |
| Keyboard | 37 keys |
| Dimensions | 23 x 6 x 16 inches |
| Synthesis Type | Analog subtractive |
| Memory | None |
| Effects | None |
| External Control | None (original Mk I units had no CV/Gate jacks) |
Design
The Model 2800 uses a 2-oscillator analog subtractive architecture with a 2-pole voltage-controlled filter (model 4023), known for a smooth but tinny character similar to the Oberheim SEM. All functions are accessed via sliders and switches; no patch cords are required. The ring modulator is implemented as a logical exclusive-OR between the pulse waves of the two VCOs. The front panel lettering was applied using PressType, and the ARP logo was designed by Margaret Shepherd.
Context
Introduced in 1972, the Odyssey was ARP’s direct response to the Minimoog, aiming to provide a more flexible, affordable, and performance-oriented alternative. It became ARP’s best-selling synthesizer and developed a strong following among funk and electronic musicians. It was one of the first duophonic synths and stood out for its immediate playability and aggressive analog sound.
Market
An auction estimate from Sotheby's in October 2021 placed the value of a Model 2800 at $2,000–$3,000. It remains one of the most sought-after analog synths on the used market.
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