1970

2500

A large duophonic modular analog synthesizer that uses slider matrices to make module connections

1971

2600

The classic duophonic 3-oscillator, semimodular analog synth, with built-in monitor speakers and spring reverb

1972

Odyssey

An analog duophonic monosynth designed to handle stage and studio use equally well

1975

Axxe

A single-voltage-controlled-oscillator version of the Odyssey that includes an audio input

1975

Little Brother

An expander module with a single VCO that offers four waveforms and four simultaneous octave divisions

1975

Omni

A popular polyphonic string synth with bass presets and stereo output

1977

Avatar

A monophonic guitar synth that borrows its filter and oscillator components from the Odyssey

1978

Quadra

ARP put several of its instruments into one package offering bass, strings, synths, and leads under microprocessor control

1980

Chroma

One of the first programmable multitimbral polysynths with a touch-sensitive keyboard and a computer interface