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Multivox MX-20

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Page last updated Dec 17, 2025

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Description

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Step into the world of vintage sound with the Multivox MX-20, a synthesizer that caters to both nostalgic vibes and modern creativity. This classic piece of musical equipment is renowned for its analog sound engine, delivering rich and warm tones reminiscent of the golden era of synthesizers. The MX-20 is designed for musicians who appreciate tactile control, offering hands-on manipulation of sound with a straightforward interface that invites experimentation. Whether you're crafting lush pads, deep basses, or vibrant leads, the MX-20's intuitive layout makes it an ideal choice for both studio sessions and live performances.

Equipped with a versatile array of features, the MX-20 ensures a dynamic sonic palette. Its dual oscillator configuration allows for layered sound creation, providing depth and complexity to your compositions. The built-in LFO and comprehensive filter section offer further opportunities for sound shaping, enabling you to dial in everything from subtle modulations to dramatic sweeps. This synthesizer also includes a selection of pre-programmed sounds, catering to immediate playability and inspiring creative exploration.

Join a community of musicians who appreciate the nuanced character and expressive potential of the Multivox MX-20. Its enduring appeal lies not only in its sound but also in its robust build, making it a reliable companion for your musical journey.

Key Features:

Analog sound engine for rich, warm tones
Dual oscillator configuration for layered sound creation
Comprehensive filter section for advanced sound shaping
Built-in LFO for modulation effects
Selection of pre-programmed sounds for instant creativity
Intuitive interface for hands-on control
Ideal for studio and live performance settings

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SynthMania

Multivox MX-20 & Moog Micromoog

SynthMania

1977 Multivox MX-20 Electronic Piano Keyboard

keyboard resource

1975 Multivox MX-20

Dustin Altick

Multivox mx20

RECYCLEDMEMORIES

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Multivox MX-20.

Setup and maintenance

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Owners struggle to find schematics for the MX-20; sourcing replacement parts like transistors can be challenging.
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The 2SA825 transistor can be replaced with a 2N3906, but note that Japanese transistor pinouts often differ, with ECB configuration instead of the typical middle base.
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Refurbishing the power supply, including replacing electrolytic and tantalum capacitors, is recommended to ensure voltage stability and prevent issues due to aged components.
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Mods and upgrades

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NTE85 transistors may be used as replacements in the MX-20, similar to applications in Vox Continental.
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Flatkeys offers clones of the obsolete LM3216 frequency divider, which may be necessary to replace if frequency output issues arise.
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Features and functionality

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Transistors in the MX-20 are primarily used for the gating circuit associated with each key, which can impact note output if faulty.
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User experience

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The lack of available schematics complicates troubleshooting and repair efforts, making component-level repairs more challenging for owners.
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