Elka Synthex

A rare Italian 8-voice analog polyphonic synthesizer with DCOs, built-in sequencer, and factory MIDI in on the MK2 version

Overview

The Elka Synthex is an analog polyphonic synthesizer built by the Italian company Elka from 1981 to 1985. Independent Italian designer Mario Maggi developed it. It has 8-voice polyphony and 4-part timbrality, so it can stack complex layered sounds. Only 1850 units were ever made, which is why it's rare. The MK2 has factory-installed MIDI in, and two tracks can output MIDI data. The keyboard has 61 keys, and the panel carries 36 knobs and 84 buttons.

Specifications

Product type	polyphonic analog synthesizer
Production years	1981 to 1985
Original price	£2,500 including VAT
Units produced	1850
Polyphony	8
Timbrality	4
Oscillators	2 per voice (16 DCOs total)
Keyboard	61 keys
Controls	36 knobs, 84 buttons
Dimensions	1095x500x165mm
MIDI	Built in factory MIDI in (MK2 version); two tracks can output MIDI data
Sequencer	Built-in sequencer

Design

The Elka Synthex is an analog, polyphonic-structured synthesizer with stable digital-controlled oscillators (DCOs). The MK2 has updated circuitry and factory-installed MIDI. Oscillator recalibration centers on board number 5840, which sits at the bottom of the 4-board stack. Schematic diagrams exist, including "Elka Synthex Schematic.pdf" from manuals.fdiskc.com.

Context

Independent Italian designer Mario Maggi developed the Elka Synthex, and it was produced in the early 1980s. In June 2024, Behringer announced plans to clone the Synthex, citing its 1981 origin. Cherry Audio also released a software emulation called Elka-X, which keeps the character of the synth and adds modern updates.

Market

As of 2026, Elka Synthex units sell for between 9,000 and 14,000 Euros, down from earlier peaks near 18,000. Original RAM memories are hard to find, and service information is limited. Oscillator recalibration procedures reference board number 5840. The original schematic is available online, which helps with restoration.