The Antonus 3620 is a sophisticated keyboard, sequencer, and CV/MIDI controller designed to be an expressive, powerful, logical, and intuitive tool. Inspired by the classic ARP 3620, the Antonus 3620 goes further by incorporating many new features and enhanced connectivity, capable of interacting with both voltage–controlled systems and MIDI devices.
Designed for anyone looking for a professional controller with a beautiful look and finish, featuring high-quality, full-size keys that work simultaneously with both MIDI and CV.
We were inspired by the original 3620 design philosophy, where the aesthetic and benefits of using big controls offered a big pleasure. This concept is deeply connected to the early days of analog systems, when patching possibilities and human-scale ergonomics defined the personality of the instrument and its bond with the musician.
At the same time, the modern high–performance digital processor allows us to unlock a level of functionality and expressive control that was unimaginable back then.
The Antonus keyboard was designed with two primary goals in mind:
The keyboard accommodates a wide variety of setups. For instance, the CV section can operate in monophonic, duophonic, biphonic, or bi-timbral modes (with independent lower and upper voices). With MIDI, it supports full polyphony as well as bi-timbral operation (transmitting on two separate channels in split mode).
We added advanced features, including CV-controlled portamento, interval latch control, aftertouch, velocity sensitivity, LFO sync, random generators, and a powerful arpeggiator/sequencer controllable via external clock. It also features a powerfull split mode that turns the unit into a true bi-timbral keyboard.
Fitting all of these capabilities within the size of the original ARP 3620 panel was a genuine engineering challenge. We achieved it while maintaining playability and a clean layout, strictly avoiding digital screens or menu-diving that would compromise its classic design spirit and tactile performance experience
We offer two keyboard options: the classic 49-key and the compact 37-key.
We preserve the classic look using traditional Tolex-covered cases, capturing the authentic spirit of legendary 1960s and 70s instruments. Beyond its vintage appeal, it offers a self-contained, road-ready design an ideal feature for touring musicians.
Keeping this traditional manufacturing process alive demands extensive manual labor in woodworking, covering, and hardware assembly, which naturally increases production costs and limits annual output per year.
For studio-focused setups or musicians who don’t require a portable flight case, we also offer a metal chassis version. It serves as a more accessible, available option that provides a sturdy, stylish, and keeping a professional look.
Customize the look of your 3620 by selecting your preferred panel finish to match with your set up:
Available for both Tolex and Metal cabinet versions
We are well known for making custom designs and this keyboard is not an exception. We offer different tolex and hardware colors, we encourage you to choose the color that fits most with your set up.
Also, we offer different led colors, that way, you can make your equipment fully personalized.
For more information do not hesitate to contact us.
The interface socket serves as the main connector for MIDI and USB connectivity. Included with the keyboard is a custom cable that allows seamless connection to computers and external hardware via USB or standard 5-pin DIN MIDI.
Additionally, an interface system for connecting to vintage ARP2600 units via the original Cinch-Jones connector is available upon request and has additional cost.
We engineered this controller to satisfy the standards of the most demanding players, featuring a premium Fatar key-bed with exceptionally responsive velocity and aftertouch. However, its capabilities extend far beyond conventional playing.
The Antonus 3620 integrates two powerful tools for deep synth programming: a built-in Arpeggiator and a Step Sequencer. The posibility to patch external CV control into parameters like clock speed or reset points unlocks impressive, expressive results, even for musicians who prefer programming and sound experimentation over traditional keyboard technique.
For lovers of generative techniques and unpredictability, the 3620 includes two dedicated random generators with independent waveforms and levels.
Furthermore, Split Mode transforms the unit into a powerful dual-zone controller. You can assign any combination of CV or MIDI routing to the upper and lower sections of the key-bed. For instance, use the lower zone for basslines, chords, arpeggios, or sequences, while using the upper zone for expressive monophonic leads or polyphonic arrangements. Combining CV and MIDI connectivity across your setup opens up infinite creative paths.
The Antonus 3620 is far more than a simple keyboard controller. To explore its full features, we invite you to download the complete user manual from our downloads section.
